National Drinking Water Database
Emerald Coast Water Utility Utilities - Pensacola, FL
Serves 307,076 people
MTBE
MTBE (methyl tert-butyl ether) is a fuel additive that had been used as an octane enhancer in unleaded gasoline; it contaminates groundwater due to spillage or leakage at gas stations, and has been banned or scheduled for phaseout in most states.Testing Summary
| Contaminant | Average/ Maximum Result | Health Limit Exceeded | Legal Limit Exceeded | Testing History -Tested  -Detected  -Over Health Guidelines  -Over Legal Limit* |
|---|---|---|---|---|
| MTBEMTBE (methyl tert-butyl ether) is a fuel additive that had been used as an octane enhancer in unleaded gasoline; it contaminates groundwater due to spillage or leakage at gas stations, and has been banned or scheduled for phaseout in most states. | 1.23 ppb 62.82 ppb | Yes 13 ppb | Legal at any levelThis is the Federal Limit. State Limits may be lower. | |
| NOTE: Each dot in the above graph represents one month. * Water utilities are noted as exceeding the legal limit if any test is above the maximum contaminant level (MCL). Most MCLs are based on annual averages so exceeding the MCL for one test does not necessarily indicate that the system is out of compliance. | ||||
Health Based and Legal Limits for MTBE
Health Based Limits for MTBE
| Standard | Description | Level |
|---|---|---|
| California Public Health Goals | Defined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health. | 13 ppb |
Testing Results
| Testing Date | Average Result | Samples taken that day | Number of Non-Detects | Range of Results |
|---|---|---|---|---|
| 2008-12-30 | 0.71 ppb | 5 | 3 | 0 to 2.38 ppb |
| 2008-12-29 | 0 ppb | 3 | 3 | 0 ppb |
| 2008-12-03 | 0.69 ppb | 2 | 1 | 0 to 1.37 ppb |
| 2008-12-02 | 3.12 ppb | 1 | 0 | 3.12 ppb |
| 2008-12-01 | 0 ppb | 5 | 5 | 0 ppb |
| 2008-11-24 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-11-06 | 1.41 ppb | 5 | 2 | 0 to 4.16 ppb |
| 2008-11-05 | 0.2 ppb | 3 | 2 | 0 to 0.6 ppb |
| 2008-10-20 | 1.73 ppb | 1 | 0 | 1.73 ppb |
| 2008-10-16 | 0 ppb | 2 | 2 | 0 ppb |
| 2008-10-15 | 0.49 ppb | 7 | 6 | 0 to 3.45 ppb |
| 2008-10-14 | 0 ppb | 2 | 2 | 0 ppb |
| 2008-10-02 | 0.9 ppb | 4 | 3 | 0 to 3.6 ppb |
| 2008-10-01 | 0.55 ppb | 4 | 3 | 0 to 2.19 ppb |
| 2008-09-17 | 0.73 ppb | 2 | 1 | 0 to 1.46 ppb |
| 2008-09-15 | 0.54 ppb | 6 | 5 | 0 to 3.25 ppb |
| 2008-09-05 | 0.56 ppb | 3 | 2 | 0 to 1.69 ppb |
| 2008-09-04 | 0.8 ppb | 3 | 2 | 0 to 2.4 ppb |
| 2008-09-03 | 0 ppb | 2 | 2 | 0 ppb |
| 2008-08-27 | 1.6 ppb | 2 | 1 | 0 to 3.19 ppb |
| 2008-08-26 | 0.63 ppb | 3 | 2 | 0 to 1.88 ppb |
| 2008-08-25 | 0.24 ppb | 3 | 2 | 0 to 0.73 ppb |
| 2008-08-08 | 4.51 ppb | 1 | 0 | 4.51 ppb |
| 2008-08-07 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-08-06 | 0.26 ppb | 3 | 2 | 0 to 0.79 ppb |
| 2008-08-05 | 0.49 ppb | 3 | 2 | 0 to 1.46 ppb |
| 2008-08-04 | 0 ppb | 4 | 4 | 0 ppb |
| 2008-07-28 | 2.25 ppb | 1 | 0 | 2.25 ppb |
| 2008-07-24 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-07-22 | 0.29 ppb | 6 | 5 | 0 to 1.76 ppb |
| 2008-07-10 | 0 ppb | 3 | 3 | 0 ppb |
| 2008-07-09 | 1.32 ppb | 2 | 1 | 0 to 2.64 ppb |
| 2008-07-08 | 0.35 ppb | 3 | 2 | 0 to 1.06 ppb |
| 2008-06-30 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-06-19 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-06-18 | 0 ppb | 2 | 2 | 0 ppb |
| 2008-06-17 | 0.39 ppb | 5 | 4 | 0 to 1.93 ppb |
| 2008-06-06 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-06-05 | 1.86 ppb | 1 | 0 | 1.86 ppb |
| 2008-06-04 | 0 ppb | 3 | 3 | 0 ppb |
| 2008-06-03 | 0 ppb | 3 | 3 | 0 ppb |
| 2008-05-21 | 0 ppb | 4 | 4 | 0 ppb |
| 2008-05-20 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-05-19 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-05-12 | 0 ppb | 2 | 2 | 0 ppb |
| 2008-05-08 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-05-07 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-05-06 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-05-05 | 0 ppb | 3 | 3 | 0 ppb |
| 2008-05-01 | 0.54 ppb | 4 | 3 | 0 to 2.15 ppb |
| 2008-04-28 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-04-16 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-04-15 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-04-14 | 0.28 ppb | 7 | 6 | 0 to 1.98 ppb |
| 2008-04-07 | 0 ppb | 2 | 2 | 0 ppb |
| 2008-04-04 | 0.05 ppb | 7 | 6 | 0 to 0.38 ppb |
| 2008-04-03 | 0 ppb | 3 | 3 | 0 ppb |
| 2008-04-02 | 0.44 ppb | 6 | 4 | 0 to 2.13 ppb |
| 2008-04-01 | 0.25 ppb | 6 | 5 | 0 to 1.49 ppb |
| 2008-03-26 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-03-25 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-03-21 | 1.86 ppb | 1 | 0 | 1.86 ppb |
| 2008-03-19 | 0.6 ppb | 3 | 2 | 0 to 1.81 ppb |
| 2008-03-18 | 0.34 ppb | 1 | 0 | 0.34 ppb |
| 2008-03-17 | 1.01 ppb | 3 | 1 | 0 to 2.57 ppb |
| 2008-03-12 | 0 ppb | 2 | 2 | 0 ppb |
| 2008-03-11 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-03-10 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-03-06 | 2.02 ppb | 1 | 0 | 2.02 ppb |
| 2008-03-05 | 0.2 ppb | 2 | 1 | 0 to 0.39 ppb |
| 2008-03-04 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-03-03 | 1.09 ppb | 3 | 0 | 0.49 to 2.22 ppb |
| 2008-02-21 | 0.51 ppb | 4 | 2 | 0 to 1.72 ppb |
| 2008-02-20 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-02-19 | 1.27 ppb | 2 | 0 | 0.48 to 2.06 ppb |
| 2008-02-14 | 0 ppb | 2 | 2 | 0 ppb |
| 2008-02-12 | 0.57 ppb | 1 | 0 | 0.57 ppb |
| 2008-02-11 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-02-08 | 1.6 ppb | 1 | 0 | 1.6 ppb |
| 2008-02-05 | 0.21 ppb | 2 | 1 | 0 to 0.41 ppb |
| 2008-02-04 | 0.97 ppb | 2 | 1 | 0 to 1.94 ppb |
| 2008-02-01 | 0.18 ppb | 2 | 1 | 0 to 0.36 ppb |
| 2008-01-24 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-01-23 | 0.38 ppb | 2 | 0 | 0.32 to 0.43 ppb |
| 2008-01-16 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-01-15 | 0.59 ppb | 3 | 2 | 0 to 1.78 ppb |
| 2008-01-14 | 1.12 ppb | 2 | 1 | 0 to 2.24 ppb |
| 2008-01-11 | 0 ppb | 2 | 2 | 0 ppb |
| 2008-01-10 | 0 ppb | 2 | 2 | 0 ppb |
| 2008-01-09 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-01-08 | 0 ppb | 4 | 4 | 0 ppb |
| 2008-01-07 | 0.18 ppb | 3 | 2 | 0 to 0.53 ppb |
| 2008-01-04 | 0.18 ppb | 2 | 1 | 0 to 0.35 ppb |
| 2008-01-03 | 0.56 ppb | 8 | 5 | 0 to 2.49 ppb |
| 2008-01-02 | 0.06 ppb | 6 | 5 | 0 to 0.34 ppb |
| 2007-12-19 | 0.43 ppb | 4 | 2 | 0 to 1.34 ppb |
| 2007-12-18 | 1.04 ppb | 2 | 1 | 0 to 2.08 ppb |
| 2007-12-17 | 0.11 ppb | 3 | 2 | 0 to 0.34 ppb |
| 2007-12-11 | 0.15 ppb | 4 | 3 | 0 to 0.6 ppb |
| 2007-12-07 | 0.8 ppb | 1 | 0 | 0.8 ppb |
| 2007-12-05 | 2.09 ppb | 1 | 0 | 2.09 ppb |
| 2007-12-04 | 0.23 ppb | 3 | 1 | 0 to 0.36 ppb |
| 2007-12-03 | 0 ppb | 4 | 4 | 0 ppb |
| 2007-11-30 | 0.45 ppb | 1 | 0 | 0.45 ppb |
| 2007-11-26 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-11-21 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-11-20 | 0.2 ppb | 4 | 2 | 0 to 0.41 ppb |
| 2007-11-19 | 0 ppb | 2 | 2 | 0 ppb |
| 2007-11-16 | 1.65 ppb | 2 | 0 | 0.83 to 2.47 ppb |
| 2007-11-14 | 0.4 ppb | 2 | 1 | 0 to 0.8 ppb |
| 2007-11-13 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-11-12 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-11-06 | 0.43 ppb | 3 | 1 | 0 to 0.71 ppb |
| 2007-11-05 | 0.35 ppb | 2 | 1 | 0 to 0.69 ppb |
| 2007-11-02 | 1.1 ppb | 3 | 1 | 0 to 2.87 ppb |
| 2007-10-30 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-10-17 | 0.23 ppb | 4 | 2 | 0 to 0.46 ppb |
| 2007-10-15 | 0.84 ppb | 5 | 2 | 0 to 3.09 ppb |
| 2007-10-13 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-10-12 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-10-11 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-10-09 | 0.72 ppb | 1 | 0 | 0.72 ppb |
| 2007-10-08 | 0 ppb | 4 | 4 | 0 ppb |
| 2007-10-04 | 0.26 ppb | 4 | 1 | 0 to 0.38 ppb |
| 2007-10-03 | 0.2 ppb | 2 | 1 | 0 to 0.4 ppb |
| 2007-10-02 | 0.02 ppb | 13 | 12 | 0 to 0.32 ppb |
| 2007-10-01 | 0.36 ppb | 3 | 1 | 0 to 0.55 ppb |
| 2007-09-19 | 0 ppb | 4 | 4 | 0 ppb |
| 2007-09-18 | 1.2 ppb | 2 | 0 | 0.33 to 2.07 ppb |
| 2007-09-17 | 0.15 ppb | 5 | 3 | 0 to 0.42 ppb |
| 2007-09-11 | 0 ppb | 2 | 2 | 0 ppb |
| 2007-09-10 | 0.44 ppb | 2 | 0 | 0.31 to 0.57 ppb |
| 2007-09-05 | 0.77 ppb | 5 | 1 | 0 to 2.72 ppb |
| 2007-09-04 | 0.25 ppb | 3 | 1 | 0 to 0.45 ppb |
| 2007-08-15 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-08-14 | 0 ppb | 2 | 2 | 0 ppb |
| 2007-08-13 | 0.65 ppb | 7 | 4 | 0 to 3.47 ppb |
| 2007-08-10 | 0.28 ppb | 2 | 1 | 0 to 0.55 ppb |
| 2007-08-07 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-08-06 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-08-05 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-08-04 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-08-03 | 0.27 ppb | 2 | 1 | 0 to 0.53 ppb |
| 2007-08-01 | 0.84 ppb | 4 | 1 | 0 to 2.62 ppb |
| 2007-07-30 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-07-25 | 0.18 ppb | 2 | 1 | 0 to 0.35 ppb |
| 2007-07-24 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-07-23 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-07-20 | 0 ppb | 2 | 2 | 0 ppb |
| 2007-07-19 | 0.87 ppb | 4 | 2 | 0 to 2.99 ppb |
| 2007-07-18 | 0.13 ppb | 3 | 2 | 0 to 0.4 ppb |
| 2007-07-17 | 0.1 ppb | 3 | 2 | 0 to 0.31 ppb |
| 2007-07-16 | 5.73 ppb | 9 | 7 | 0 to 50.91 ppb |
| 2007-07-11 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-07-10 | 0.39 ppb | 3 | 2 | 0 to 1.17 ppb |
| 2007-07-09 | 0 ppb | 2 | 2 | 0 ppb |
| 2007-07-06 | 11.72 ppb | 3 | 1 | 0 to 34.76 ppb |
| 2007-07-05 | 3.78 ppb | 1 | 0 | 3.78 ppb |
| 2007-07-03 | 0.08 ppb | 4 | 3 | 0 to 0.33 ppb |
| 2007-07-02 | 0.78 ppb | 1 | 0 | 0.78 ppb |
| 2007-06-22 | 36.01 ppb | 1 | 0 | 36.01 ppb |
| 2007-06-21 | 0.37 ppb | 4 | 1 | 0 to 0.8 ppb |
| 2007-06-20 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-06-19 | 0.91 ppb | 3 | 2 | 0 to 2.74 ppb |
| 2007-06-13 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-06-11 | 0.37 ppb | 3 | 2 | 0 to 1.1 ppb |
| 2007-06-06 | 10.19 ppb | 3 | 2 | 0 to 30.57 ppb |
| 2007-06-05 | 1.24 ppb | 3 | 1 | 0 to 2.85 ppb |
| 2007-06-04 | 0 ppb | 3 | 3 | 0 ppb |
| 2007-05-18 | 0 ppb | 2 | 2 | 0 ppb |
| 2007-05-17 | 0 ppb | 2 | 2 | 0 ppb |
| 2007-05-16 | 0 ppb | 8 | 8 | 0 ppb |
| 2007-05-15 | 1 ppb | 4 | 2 | 0 to 2.92 ppb |
| 2007-05-14 | 0 ppb | 2 | 2 | 0 ppb |
| 2007-05-10 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-05-08 | 0.54 ppb | 2 | 1 | 0 to 1.07 ppb |
| 2007-05-07 | 0 ppb | 2 | 2 | 0 ppb |
| 2007-05-04 | 0.69 ppb | 6 | 4 | 0 to 3.11 ppb |
| 2007-05-03 | 0 ppb | 2 | 2 | 0 ppb |
| 2007-04-24 | 0 ppb | 2 | 2 | 0 ppb |
| 2007-04-23 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-04-21 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-04-20 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-04-18 | 0.72 ppb | 3 | 2 | 0 to 2.17 ppb |
| 2007-04-17 | 0 ppb | 2 | 2 | 0 ppb |
| 2007-04-16 | 7.74 ppb | 4 | 1 | 0 to 28.59 ppb |
| 2007-04-13 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-04-12 | 0.48 ppb | 2 | 1 | 0 to 0.96 ppb |
| 2007-04-10 | 0 ppb | 4 | 4 | 0 ppb |
| 2007-04-09 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-04-06 | 0 ppb | 2 | 2 | 0 ppb |
| 2007-04-04 | 21.12 ppb | 2 | 0 | 3.27 to 38.97 ppb |
| 2007-04-03 | 0 ppb | 2 | 2 | 0 ppb |
| 2007-04-02 | 1.05 ppb | 2 | 1 | 0 to 2.1 ppb |
| 2007-03-22 | 0.27 ppb | 2 | 1 | 0 to 0.54 ppb |
| 2007-03-21 | 1.37 ppb | 2 | 1 | 0 to 2.73 ppb |
| 2007-03-19 | 13.54 ppb | 4 | 2 | 0 to 52.17 ppb |
| 2007-03-16 | 0 ppb | 2 | 2 | 0 ppb |
| 2007-03-15 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-03-13 | 0.73 ppb | 1 | 0 | 0.73 ppb |
| 2007-03-12 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-03-08 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-03-07 | 18.2 ppb | 3 | 1 | 0 to 50.84 ppb |
| 2007-03-05 | 1 ppb | 2 | 1 | 0 to 1.99 ppb |
| 2007-03-02 | 0.55 ppb | 2 | 0 | 0.53 to 0.57 ppb |
| 2007-02-22 | 0 ppb | 2 | 2 | 0 ppb |
| 2007-02-21 | 0 ppb | 2 | 2 | 0 ppb |
| 2007-02-15 | 0.96 ppb | 2 | 1 | 0 to 1.91 ppb |
| 2007-02-14 | 14.54 ppb | 3 | 2 | 0 to 43.63 ppb |
| 2007-02-09 | 0.4 ppb | 2 | 1 | 0 to 0.8 ppb |
| 2007-02-08 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-02-07 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-02-06 | 24.32 ppb | 2 | 0 | 3.69 to 44.95 ppb |
| 2007-02-05 | 0.71 ppb | 3 | 2 | 0 to 2.13 ppb |
| 2007-02-02 | 0 ppb | 2 | 2 | 0 ppb |
| 2007-01-25 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-01-18 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-01-17 | 1.96 ppb | 3 | 2 | 0 to 5.87 ppb |
| 2007-01-16 | 18.31 ppb | 3 | 1 | 0 to 51.42 ppb |
| 2007-01-12 | 0 ppb | 1 | 1 | 0 ppb |
| 2007-01-11 | 0.27 ppb | 3 | 2 | 0 to 0.82 ppb |
| 2007-01-10 | 0 ppb | 7 | 7 | 0 ppb |
| 2007-01-09 | 0 ppb | 8 | 8 | 0 ppb |
| 2007-01-08 | 0 ppb | 2 | 2 | 0 ppb |
| 2007-01-04 | 0 ppb | 2 | 2 | 0 ppb |
| 2007-01-03 | 18.91 ppb | 4 | 1 | 0 to 67.18 ppb |
| 2007-01-02 | 0 ppb | 3 | 3 | 0 ppb |
| 2006-12-20 | 1.05 ppb | 4 | 2 | 0 to 3.67 ppb |
| 2006-12-19 | 0.11 ppb | 5 | 4 | 0 to 0.53 ppb |
| 2006-12-18 | 20.97 ppb | 3 | 1 | 0 to 60.6 ppb |
| 2006-12-12 | 0 ppb | 3 | 3 | 0 ppb |
| 2006-12-11 | 0.76 ppb | 1 | 0 | 0.76 ppb |
| 2006-12-08 | 17.4 ppb | 3 | 1 | 0 to 48.45 ppb |
| 2006-12-07 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-12-06 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-12-05 | 0.69 ppb | 4 | 3 | 0 to 2.75 ppb |
| 2006-11-16 | 0 ppb | 4 | 4 | 0 ppb |
| 2006-11-15 | 62.82 ppb | 1 | 0 | 62.82 ppb |
| 2006-11-14 | 1.17 ppb | 7 | 4 | 0 to 3.81 ppb |
| 2006-11-13 | 0 ppb | 2 | 2 | 0 ppb |
| 2006-11-09 | 0 ppb | 2 | 2 | 0 ppb |
| 2006-11-07 | 0 ppb | 2 | 2 | 0 ppb |
| 2006-11-06 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-11-02 | 1.32 ppb | 3 | 2 | 0 to 3.95 ppb |
| 2006-11-01 | 25.32 ppb | 2 | 0 | 2.62 to 48.02 ppb |
| 2006-10-24 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-10-20 | 0 ppb | 2 | 2 | 0 ppb |
| 2006-10-19 | 47.37 ppb | 1 | 0 | 47.37 ppb |
| 2006-10-18 | 1.78 ppb | 3 | 1 | 0 to 3.83 ppb |
| 2006-10-17 | 0.14 ppb | 4 | 3 | 0 to 0.57 ppb |
| 2006-10-16 | 0.63 ppb | 1 | 0 | 0.63 ppb |
| 2006-10-10 | 0 ppb | 2 | 2 | 0 ppb |
| 2006-10-06 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-10-05 | 0 ppb | 5 | 5 | 0 ppb |
| 2006-10-04 | 0 ppb | 6 | 6 | 0 ppb |
| 2006-10-03 | 7.33 ppb | 9 | 6 | 0 to 60.78 ppb |
| 2006-10-02 | 0.28 ppb | 2 | 1 | 0 to 0.56 ppb |
| 2006-09-20 | 0 ppb | 3 | 3 | 0 ppb |
| 2006-09-19 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-09-18 | 12.88 ppb | 4 | 2 | 0 to 48.85 ppb |
| 2006-09-13 | 0 ppb | 2 | 2 | 0 ppb |
| 2006-09-12 | 0.52 ppb | 2 | 1 | 0 to 1.03 ppb |
| 2006-09-07 | 3.94 ppb | 1 | 0 | 3.94 ppb |
| 2006-09-06 | 12.97 ppb | 3 | 2 | 0 to 38.92 ppb |
| 2006-09-05 | 1.31 ppb | 4 | 2 | 0 to 4.47 ppb |
| 2006-08-22 | 0 ppb | 3 | 3 | 0 ppb |
| 2006-08-21 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-08-18 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-08-16 | 2.06 ppb | 4 | 2 | 0 to 4.48 ppb |
| 2006-08-15 | 16.21 ppb | 2 | 1 | 0 to 32.42 ppb |
| 2006-08-14 | 0 ppb | 3 | 3 | 0 ppb |
| 2006-08-11 | 0 ppb | 2 | 2 | 0 ppb |
| 2006-08-10 | 0 ppb | 10 | 10 | 0 ppb |
| 2006-08-07 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-08-05 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-08-04 | 1.4 ppb | 3 | 2 | 0 to 4.19 ppb |
| 2006-08-03 | 0.79 ppb | 5 | 4 | 0 to 3.93 ppb |
| 2006-08-02 | 1.66 ppb | 2 | 1 | 0 to 3.32 ppb |
| 2006-08-01 | 8.1 ppb | 3 | 2 | 0 to 24.3 ppb |
| 2006-07-28 | 14.15 ppb | 2 | 0 | 3.07 to 25.23 ppb |
| 2006-07-27 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-07-26 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-07-25 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-07-24 | 0 ppb | 2 | 2 | 0 ppb |
| 2006-07-20 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-07-19 | 21.12 ppb | 1 | 0 | 21.12 ppb |
| 2006-07-14 | 0.52 ppb | 2 | 1 | 0 to 1.04 ppb |
| 2006-07-12 | 4.3 ppb | 1 | 0 | 4.3 ppb |
| 2006-07-11 | 3.66 ppb | 3 | 2 | 0 to 10.97 ppb |
| 2006-07-10 | 0 ppb | 2 | 2 | 0 ppb |
| 2006-07-07 | 2.87 ppb | 1 | 0 | 2.87 ppb |
| 2006-07-06 | 0 ppb | 2 | 2 | 0 ppb |
| 2006-07-05 | 1.98 ppb | 2 | 1 | 0 to 3.95 ppb |
| 2006-07-01 | 0.79 ppb | 1 | 0 | 0.79 ppb |
| 2006-06-26 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-06-23 | 0 ppb | 3 | 3 | 0 ppb |
| 2006-06-22 | 4.7 ppb | 1 | 0 | 4.7 ppb |
| 2006-06-20 | 9.8 ppb | 3 | 1 | 0 to 25.54 ppb |
| 2006-06-19 | 0 ppb | 3 | 3 | 0 ppb |
| 2006-06-16 | 0.44 ppb | 2 | 1 | 0 to 0.88 ppb |
| 2006-06-07 | 5.23 ppb | 5 | 3 | 0 to 20.81 ppb |
| 2006-06-06 | 0 ppb | 3 | 3 | 0 ppb |
| 2006-06-05 | 3.68 ppb | 1 | 0 | 3.68 ppb |
| 2006-05-24 | 0.88 ppb | 1 | 0 | 0.88 ppb |
| 2006-05-23 | 0.53 ppb | 1 | 0 | 0.53 ppb |
| 2006-05-19 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-05-18 | 0 ppb | 2 | 2 | 0 ppb |
| 2006-05-17 | 3.64 ppb | 1 | 0 | 3.64 ppb |
| 2006-05-15 | 3.9 ppb | 4 | 2 | 0 to 11.74 ppb |
| 2006-05-11 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-05-09 | 0 ppb | 2 | 2 | 0 ppb |
| 2006-05-04 | 0 ppb | 2 | 2 | 0 ppb |
| 2006-05-03 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-05-02 | 2.34 ppb | 5 | 3 | 0 to 8.45 ppb |
| 2006-05-01 | 2.03 ppb | 2 | 1 | 0 to 4.05 ppb |
| 2006-04-21 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-04-20 | 3.69 ppb | 3 | 1 | 0 to 7.69 ppb |
| 2006-04-19 | 0.88 ppb | 4 | 3 | 0 to 3.52 ppb |
| 2006-04-18 | 0.11 ppb | 5 | 4 | 0 to 0.56 ppb |
| 2006-04-13 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-04-12 | 0 ppb | 3 | 3 | 0 ppb |
| 2006-04-10 | 0 ppb | 6 | 6 | 0 ppb |
| 2006-04-07 | 1.34 ppb | 2 | 1 | 0 to 2.68 ppb |
| 2006-04-06 | 0 ppb | 4 | 4 | 0 ppb |
| 2006-04-05 | 0 ppb | 2 | 2 | 0 ppb |
| 2006-04-04 | 1.8 ppb | 4 | 3 | 0 to 7.2 ppb |
| 2006-04-03 | 0.55 ppb | 5 | 3 | 0 to 1.66 ppb |
| 2006-03-24 | 0.59 ppb | 1 | 0 | 0.59 ppb |
| 2006-03-23 | 0.35 ppb | 2 | 1 | 0 to 0.69 ppb |
| 2006-03-22 | 1.58 ppb | 1 | 0 | 1.58 ppb |
| 2006-03-21 | 0.73 ppb | 2 | 1 | 0 to 1.45 ppb |
| 2006-03-20 | 1.86 ppb | 3 | 2 | 0 to 5.59 ppb |
| 2006-03-17 | 0.84 ppb | 1 | 0 | 0.84 ppb |
| 2006-03-15 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-03-13 | 0 ppb | 2 | 2 | 0 ppb |
| 2006-03-10 | 0.84 ppb | 1 | 0 | 0.84 ppb |
| 2006-03-09 | 0.13 ppb | 2 | 1 | 0 to 0.26 ppb |
| 2006-03-08 | 2.33 ppb | 2 | 0 | 0.99 to 3.66 ppb |
| 2006-03-07 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-03-06 | 1.81 ppb | 1 | 0 | 1.81 ppb |
| 2006-03-03 | 0.13 ppb | 1 | 0 | 0.13 ppb |
| 2006-03-02 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-02-28 | 0.38 ppb | 1 | 0 | 0.38 ppb |
| 2006-02-27 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-02-24 | 0.52 ppb | 1 | 0 | 0.52 ppb |
| 2006-02-23 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-02-22 | 1.09 ppb | 3 | 1 | 0 to 2.41 ppb |
| 2006-02-21 | 1.34 ppb | 2 | 0 | 0.22 to 2.45 ppb |
| 2006-02-16 | 0.95 ppb | 1 | 0 | 0.95 ppb |
| 2006-02-15 | 0.09 ppb | 2 | 1 | 0 to 0.17 ppb |
| 2006-02-14 | 0.2 ppb | 1 | 0 | 0.2 ppb |
| 2006-02-10 | 0.57 ppb | 1 | 0 | 0.57 ppb |
| 2006-02-09 | 0 ppb | 2 | 2 | 0 ppb |
| 2006-02-08 | 0.1 ppb | 2 | 1 | 0 to 0.19 ppb |
| 2006-02-07 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-02-06 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-02-03 | 0.18 ppb | 2 | 1 | 0 to 0.36 ppb |
| 2006-02-02 | 1.53 ppb | 3 | 1 | 0 to 2.46 ppb |
| 2006-02-01 | 0.21 ppb | 5 | 4 | 0 to 1.03 ppb |
| 2006-01-31 | 0 ppb | 3 | 3 | 0 ppb |
| 2006-01-30 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-01-27 | 0 ppb | 1 | 1 | 0 ppb |
| 2006-01-18 | 1.76 ppb | 1 | 0 | 1.76 ppb |
| 2006-01-17 | 0.74 ppb | 3 | 1 | 0 to 1.68 ppb |
| 2006-01-12 | 0.09 ppb | 2 | 1 | 0 to 0.18 ppb |
| 2006-01-11 | 0.1 ppb | 3 | 1 | 0 to 0.17 ppb |
| 2006-01-10 | 0.64 ppb | 2 | 0 | 0.32 to 0.96 ppb |
| 2006-01-09 | 0 ppb | 3 | 3 | 0 ppb |
| 2006-01-06 | 0.14 ppb | 2 | 1 | 0 to 0.28 ppb |
| 2006-01-05 | 0.79 ppb | 3 | 1 | 0 to 2.2 ppb |
| 2006-01-04 | 0.04 ppb | 4 | 3 | 0 to 0.17 ppb |
| 2006-01-03 | 0.18 ppb | 4 | 1 | 0 to 0.34 ppb |
| 2005-12-23 | 0.06 ppb | 2 | 1 | 0 to 0.11 ppb |
| 2005-12-22 | 0.63 ppb | 1 | 0 | 0.63 ppb |
| 2005-12-21 | 1.06 ppb | 2 | 0 | 0.14 to 1.98 ppb |
| 2005-12-20 | 0.17 ppb | 2 | 0 | 0.14 to 0.2 ppb |
| 2005-12-19 | 0.35 ppb | 2 | 1 | 0 to 0.69 ppb |
| 2005-12-15 | 0.51 ppb | 2 | 1 | 0 to 1.01 ppb |
| 2005-12-12 | 0.08 ppb | 2 | 1 | 0 to 0.15 ppb |
| 2005-12-08 | 0.16 ppb | 2 | 0 | 0.1 to 0.22 ppb |
| 2005-12-05 | 0.38 ppb | 1 | 0 | 0.38 ppb |
| 2005-12-02 | 0.05 ppb | 3 | 2 | 0 to 0.16 ppb |
| 2005-11-30 | 3.69 ppb | 1 | 0 | 3.69 ppb |
| 2005-11-23 | 0.1 ppb | 1 | 0 | 0.1 ppb |
| 2005-11-22 | 0.43 ppb | 4 | 0 | 0.14 to 0.71 ppb |
| 2005-11-21 | 0.45 ppb | 2 | 0 | 0.16 to 0.73 ppb |
| 2005-11-18 | 0.1 ppb | 1 | 0 | 0.1 ppb |
| 2005-11-17 | 0.12 ppb | 1 | 0 | 0.12 ppb |
| 2005-11-15 | 0 ppb | 2 | 2 | 0 ppb |
| 2005-11-14 | 0.05 ppb | 2 | 1 | 0 to 0.09 ppb |
| 2005-11-10 | 0.79 ppb | 1 | 0 | 0.79 ppb |
| 2005-11-09 | 0.24 ppb | 3 | 1 | 0 to 0.48 ppb |
| 2005-11-08 | 0.15 ppb | 3 | 0 | 0.12 to 0.19 ppb |
| 2005-10-25 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-10-24 | 0.11 ppb | 5 | 2 | 0 to 0.27 ppb |
| 2005-10-21 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-10-19 | 0.16 ppb | 1 | 0 | 0.16 ppb |
| 2005-10-17 | 1.25 ppb | 3 | 0 | 0.12 to 2.62 ppb |
| 2005-10-14 | 0.09 ppb | 3 | 2 | 0 to 0.27 ppb |
| 2005-10-13 | 0 ppb | 6 | 6 | 0 ppb |
| 2005-10-07 | 0.3 ppb | 4 | 1 | 0 to 0.72 ppb |
| 2005-10-06 | 0 ppb | 2 | 2 | 0 ppb |
| 2005-10-04 | 0 ppb | 2 | 2 | 0 ppb |
| 2005-10-03 | 0.26 ppb | 9 | 6 | 0 to 1.72 ppb |
| 2005-09-21 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-09-20 | 1.76 ppb | 3 | 2 | 0 to 5.28 ppb |
| 2005-09-19 | 0.34 ppb | 2 | 0 | 0.27 to 0.4 ppb |
| 2005-09-14 | 0 ppb | 2 | 2 | 0 ppb |
| 2005-09-13 | 0.42 ppb | 2 | 1 | 0 to 0.84 ppb |
| 2005-09-07 | 0.13 ppb | 2 | 1 | 0 to 0.26 ppb |
| 2005-09-06 | 0.62 ppb | 2 | 0 | 0.55 to 0.69 ppb |
| 2005-09-02 | 0.09 ppb | 4 | 3 | 0 to 0.34 ppb |
| 2005-09-01 | 3.94 ppb | 2 | 1 | 0 to 7.87 ppb |
| 2005-08-22 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-08-18 | 1.03 ppb | 3 | 1 | 0 to 2.68 ppb |
| 2005-08-17 | 1.56 ppb | 5 | 2 | 0 to 6.9 ppb |
| 2005-08-16 | 0.44 ppb | 1 | 0 | 0.44 ppb |
| 2005-08-12 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-08-09 | 0.06 ppb | 3 | 2 | 0 to 0.18 ppb |
| 2005-08-08 | 0.66 ppb | 2 | 0 | 0.2 to 1.12 ppb |
| 2005-08-05 | 0.36 ppb | 1 | 0 | 0.36 ppb |
| 2005-08-04 | 0.63 ppb | 1 | 0 | 0.63 ppb |
| 2005-08-03 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-08-02 | 1.97 ppb | 4 | 0 | 0.21 to 4.85 ppb |
| 2005-08-01 | 0 ppb | 4 | 4 | 0 ppb |
| 2005-07-29 | 0.65 ppb | 1 | 0 | 0.65 ppb |
| 2005-07-28 | 2.7 ppb | 1 | 0 | 2.7 ppb |
| 2005-07-27 | 2.07 ppb | 3 | 1 | 0 to 5.75 ppb |
| 2005-07-22 | 0 ppb | 3 | 3 | 0 ppb |
| 2005-07-21 | 2.76 ppb | 3 | 1 | 0 to 5.32 ppb |
| 2005-07-20 | 0.36 ppb | 1 | 0 | 0.36 ppb |
| 2005-07-19 | 0 ppb | 2 | 2 | 0 ppb |
| 2005-07-18 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-07-15 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-07-14 | 0.38 ppb | 4 | 2 | 0 to 1.04 ppb |
| 2005-07-13 | 0 ppb | 7 | 7 | 0 ppb |
| 2005-07-01 | 0.15 ppb | 12 | 9 | 0 to 0.75 ppb |
| 2005-06-21 | 2.44 ppb | 1 | 0 | 2.44 ppb |
| 2005-06-20 | 1.5 ppb | 4 | 2 | 0 to 5.63 ppb |
| 2005-06-17 | 0.45 ppb | 1 | 0 | 0.45 ppb |
| 2005-06-15 | 0 ppb | 3 | 3 | 0 ppb |
| 2005-06-14 | 0.37 ppb | 3 | 1 | 0 to 0.69 ppb |
| 2005-06-08 | 0.27 ppb | 3 | 2 | 0 to 0.81 ppb |
| 2005-06-07 | 0.58 ppb | 2 | 1 | 0 to 1.15 ppb |
| 2005-06-06 | 0 ppb | 2 | 2 | 0 ppb |
| 2005-06-03 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-06-02 | 4.84 ppb | 2 | 0 | 3.38 to 6.29 ppb |
| 2005-06-01 | 0 ppb | 2 | 2 | 0 ppb |
| 2005-05-25 | 3.49 ppb | 1 | 0 | 3.49 ppb |
| 2005-05-19 | 0.39 ppb | 2 | 1 | 0 to 0.77 ppb |
| 2005-05-18 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-05-17 | 0.94 ppb | 6 | 5 | 0 to 5.65 ppb |
| 2005-05-12 | 0.82 ppb | 3 | 2 | 0 to 2.47 ppb |
| 2005-05-11 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-05-10 | 0.74 ppb | 1 | 0 | 0.74 ppb |
| 2005-05-09 | 0 ppb | 2 | 2 | 0 ppb |
| 2005-05-04 | 0.29 ppb | 2 | 1 | 0 to 0.57 ppb |
| 2005-05-03 | 0.93 ppb | 5 | 4 | 0 to 4.65 ppb |
| 2005-05-02 | 0.86 ppb | 1 | 0 | 0.86 ppb |
| 2005-04-27 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-04-25 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-04-21 | 0.19 ppb | 4 | 3 | 0 to 0.75 ppb |
| 2005-04-20 | 0.19 ppb | 2 | 1 | 0 to 0.38 ppb |
| 2005-04-19 | 1.29 ppb | 2 | 1 | 0 to 2.58 ppb |
| 2005-04-18 | 1.58 ppb | 4 | 0 | 0.34 to 5 ppb |
| 2005-04-15 | 0.29 ppb | 1 | 0 | 0.29 ppb |
| 2005-04-14 | 0.26 ppb | 2 | 1 | 0 to 0.52 ppb |
| 2005-04-12 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-04-11 | 0.36 ppb | 3 | 2 | 0 to 1.08 ppb |
| 2005-04-08 | 0.12 ppb | 3 | 2 | 0 to 0.35 ppb |
| 2005-04-07 | 0.33 ppb | 8 | 7 | 0 to 2.6 ppb |
| 2005-04-05 | 0 ppb | 2 | 2 | 0 ppb |
| 2005-04-04 | 0.9 ppb | 6 | 4 | 0 to 4.52 ppb |
| 2005-03-30 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-03-22 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-03-16 | 0.77 ppb | 1 | 0 | 0.77 ppb |
| 2005-03-14 | 1.21 ppb | 6 | 3 | 0 to 4.11 ppb |
| 2005-03-11 | 0.2 ppb | 2 | 1 | 0 to 0.4 ppb |
| 2005-03-10 | 0 ppb | 4 | 4 | 0 ppb |
| 2005-03-07 | 0.28 ppb | 1 | 0 | 0.28 ppb |
| 2005-03-04 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-03-03 | 0.25 ppb | 1 | 0 | 0.25 ppb |
| 2005-03-02 | 0.59 ppb | 3 | 0 | 0.19 to 0.81 ppb |
| 2005-03-01 | 1.43 ppb | 2 | 1 | 0 to 2.86 ppb |
| 2005-02-24 | 1.1 ppb | 1 | 0 | 1.1 ppb |
| 2005-02-20 | 0.3 ppb | 1 | 0 | 0.3 ppb |
| 2005-02-18 | 0.82 ppb | 1 | 0 | 0.82 ppb |
| 2005-02-17 | 0 ppb | 2 | 2 | 0 ppb |
| 2005-02-16 | 0.1 ppb | 2 | 1 | 0 to 0.2 ppb |
| 2005-02-15 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-02-14 | 0.2 ppb | 3 | 1 | 0 to 0.34 ppb |
| 2005-02-10 | 0.75 ppb | 4 | 2 | 0 to 2.85 ppb |
| 2005-02-09 | 0.2 ppb | 1 | 0 | 0.2 ppb |
| 2005-02-08 | 0 ppb | 3 | 3 | 0 ppb |
| 2005-02-07 | 0 ppb | 2 | 2 | 0 ppb |
| 2005-02-04 | 0 ppb | 2 | 2 | 0 ppb |
| 2005-02-03 | 0 ppb | 7 | 7 | 0 ppb |
| 2005-02-02 | 0.4 ppb | 2 | 1 | 0 to 0.79 ppb |
| 2005-02-01 | 0 ppb | 3 | 3 | 0 ppb |
| 2005-01-28 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-01-27 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-01-26 | 2.7 ppb | 1 | 0 | 2.7 ppb |
| 2005-01-24 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-01-21 | 0 ppb | 3 | 3 | 0 ppb |
| 2005-01-20 | 0.86 ppb | 1 | 0 | 0.86 ppb |
| 2005-01-18 | 0 ppb | 1 | 1 | 0 ppb |
| 2005-01-13 | 0.92 ppb | 3 | 2 | 0 to 2.75 ppb |
| 2005-01-12 | 0 ppb | 3 | 3 | 0 ppb |
| 2005-01-11 | 0 ppb | 3 | 3 | 0 ppb |
| 2005-01-07 | 0.33 ppb | 3 | 2 | 0 to 1 ppb |
| 2005-01-05 | 0 ppb | 2 | 2 | 0 ppb |
| 2005-01-04 | 0 ppb | 2 | 2 | 0 ppb |
| 2004-12-23 | 0.78 ppb | 1 | 0 | 0.78 ppb |
| 2004-12-22 | 0 ppb | 2 | 2 | 0 ppb |
| 2004-12-21 | 0.97 ppb | 3 | 1 | 0 to 2.37 ppb |
| 2004-12-13 | 0 ppb | 3 | 3 | 0 ppb |
| 2004-12-10 | 2.09 ppb | 1 | 0 | 2.09 ppb |
| 2004-12-09 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-12-07 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-12-03 | 0 ppb | 2 | 2 | 0 ppb |
| 2004-11-30 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-11-23 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-11-16 | 0.89 ppb | 2 | 1 | 0 to 1.77 ppb |
| 2004-11-12 | 1.17 ppb | 1 | 0 | 1.17 ppb |
| 2004-11-11 | 0 ppb | 3 | 3 | 0 ppb |
| 2004-11-06 | 1.56 ppb | 1 | 0 | 1.56 ppb |
| 2004-11-05 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-11-03 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-11-02 | 0 ppb | 2 | 2 | 0 ppb |
| 2004-10-29 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-10-28 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-10-27 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-10-26 | 1.76 ppb | 1 | 0 | 1.76 ppb |
| 2004-10-25 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-10-08 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-10-07 | 0.29 ppb | 4 | 3 | 0 to 1.15 ppb |
| 2004-10-06 | 0 ppb | 4 | 4 | 0 ppb |
| 2004-10-05 | 0 ppb | 9 | 9 | 0 ppb |
| 2004-10-04 | 1.01 ppb | 2 | 1 | 0 to 2.02 ppb |
| 2004-09-10 | 1.01 ppb | 1 | 0 | 1.01 ppb |
| 2004-09-08 | 0.74 ppb | 3 | 2 | 0 to 2.23 ppb |
| 2004-09-07 | 1.48 ppb | 3 | 2 | 0 to 4.43 ppb |
| 2004-09-02 | 0 ppb | 3 | 3 | 0 ppb |
| 2004-08-30 | 2.14 ppb | 1 | 0 | 2.14 ppb |
| 2004-08-23 | 1.22 ppb | 1 | 0 | 1.22 ppb |
| 2004-08-19 | 5.31 ppb | 1 | 0 | 5.31 ppb |
| 2004-08-17 | 0.26 ppb | 5 | 4 | 0 to 1.3 ppb |
| 2004-08-16 | 0 ppb | 2 | 2 | 0 ppb |
| 2004-08-13 | 0 ppb | 3 | 3 | 0 ppb |
| 2004-08-12 | 0 ppb | 2 | 2 | 0 ppb |
| 2004-08-11 | 0 ppb | 2 | 2 | 0 ppb |
| 2004-08-10 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-08-06 | 1.07 ppb | 3 | 1 | 0 to 2.15 ppb |
| 2004-08-05 | 1.08 ppb | 4 | 3 | 0 to 4.31 ppb |
| 2004-08-02 | 1.97 ppb | 1 | 0 | 1.97 ppb |
| 2004-07-29 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-07-28 | 0.57 ppb | 2 | 1 | 0 to 1.14 ppb |
| 2004-07-22 | 0.45 ppb | 4 | 3 | 0 to 1.8 ppb |
| 2004-07-21 | 0 ppb | 3 | 3 | 0 ppb |
| 2004-07-19 | 1.56 ppb | 3 | 2 | 0 to 4.68 ppb |
| 2004-07-13 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-07-12 | 0 ppb | 3 | 3 | 0 ppb |
| 2004-07-09 | 0.57 ppb | 4 | 2 | 0 to 1.2 ppb |
| 2004-07-08 | 0 ppb | 5 | 5 | 0 ppb |
| 2004-07-07 | 0 ppb | 4 | 4 | 0 ppb |
| 2004-07-02 | 1.28 ppb | 5 | 2 | 0 to 4.19 ppb |
| 2004-07-01 | 0 ppb | 2 | 2 | 0 ppb |
| 2004-06-30 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-06-28 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-06-24 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-06-18 | 1.34 ppb | 6 | 3 | 0 to 5.1 ppb |
| 2004-06-17 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-06-10 | 0.63 ppb | 2 | 1 | 0 to 1.26 ppb |
| 2004-06-08 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-06-07 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-06-04 | 1.09 ppb | 1 | 0 | 1.09 ppb |
| 2004-06-03 | 0 ppb | 5 | 5 | 0 ppb |
| 2004-06-02 | 1.71 ppb | 4 | 2 | 0 to 4.73 ppb |
| 2004-05-21 | 0.95 ppb | 2 | 1 | 0 to 1.9 ppb |
| 2004-05-20 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-05-19 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-05-17 | 1.05 ppb | 6 | 4 | 0 to 5.03 ppb |
| 2004-05-11 | 0 ppb | 3 | 3 | 0 ppb |
| 2004-05-10 | 1.31 ppb | 1 | 0 | 1.31 ppb |
| 2004-05-07 | 0 ppb | 2 | 2 | 0 ppb |
| 2004-05-06 | 0.88 ppb | 2 | 1 | 0 to 1.75 ppb |
| 2004-05-05 | 0.41 ppb | 3 | 2 | 0 to 1.24 ppb |
| 2004-05-04 | 0 ppb | 3 | 3 | 0 ppb |
| 2004-05-03 | 4.79 ppb | 1 | 0 | 4.79 ppb |
| 2004-04-29 | 0 ppb | 2 | 2 | 0 ppb |
| 2004-04-23 | 0 ppb | 5 | 5 | 0 ppb |
| 2004-04-22 | 2.12 ppb | 3 | 1 | 0 to 4.91 ppb |
| 2004-04-21 | 0.14 ppb | 6 | 5 | 0 to 0.86 ppb |
| 2004-04-16 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-04-14 | 0.48 ppb | 2 | 1 | 0 to 0.96 ppb |
| 2004-04-13 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-04-09 | 0.81 ppb | 1 | 0 | 0.81 ppb |
| 2004-04-08 | 0.05 ppb | 9 | 8 | 0 to 0.42 ppb |
| 2004-04-07 | 0 ppb | 2 | 2 | 0 ppb |
| 2004-04-06 | 0 ppb | 3 | 3 | 0 ppb |
| 2004-04-03 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-04-02 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-04-01 | 0.88 ppb | 5 | 3 | 0 to 3.49 ppb |
| 2004-03-31 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-03-29 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-03-27 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-03-26 | 0 ppb | 3 | 3 | 0 ppb |
| 2004-03-25 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-03-19 | 0.25 ppb | 1 | 0 | 0.25 ppb |
| 2004-03-18 | 0 ppb | 2 | 2 | 0 ppb |
| 2004-03-17 | 0.62 ppb | 1 | 0 | 0.62 ppb |
| 2004-03-16 | 2.2 ppb | 2 | 1 | 0 to 4.39 ppb |
| 2004-03-11 | 0.72 ppb | 2 | 1 | 0 to 1.44 ppb |
| 2004-03-04 | 0 ppb | 3 | 3 | 0 ppb |
| 2004-03-03 | 0 ppb | 2 | 2 | 0 ppb |
| 2004-03-02 | 1.91 ppb | 2 | 1 | 0 to 3.82 ppb |
| 2004-03-01 | 0 ppb | 2 | 2 | 0 ppb |
| 2004-02-27 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-02-26 | 2.13 ppb | 2 | 0 | 0.24 to 4.02 ppb |
| 2004-02-25 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-02-23 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-02-20 | 0 ppb | 3 | 3 | 0 ppb |
| 2004-02-13 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-02-11 | 1.05 ppb | 1 | 0 | 1.05 ppb |
| 2004-02-10 | 0 ppb | 2 | 2 | 0 ppb |
| 2004-02-05 | 0.39 ppb | 2 | 1 | 0 to 0.77 ppb |
| 2004-02-04 | 0.07 ppb | 5 | 4 | 0 to 0.36 ppb |
| 2004-02-03 | 2.09 ppb | 2 | 1 | 0 to 4.17 ppb |
| 2004-01-28 | 0 ppb | 2 | 2 | 0 ppb |
| 2004-01-27 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-01-26 | 1.37 ppb | 3 | 2 | 0 to 4.11 ppb |
| 2004-01-23 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-01-22 | 1.02 ppb | 1 | 0 | 1.02 ppb |
| 2004-01-21 | 0 ppb | 5 | 5 | 0 ppb |
| 2004-01-20 | 0 ppb | 1 | 1 | 0 ppb |
| 2004-01-16 | 0 ppb | 4 | 4 | 0 ppb |
| 2004-01-15 | 0.45 ppb | 3 | 2 | 0 to 1.35 ppb |
| 2004-01-14 | 1.99 ppb | 2 | 1 | 0 to 3.98 ppb |
| 2004-01-09 | 0 ppb | 2 | 2 | 0 ppb |
| 2004-01-08 | 0 ppb | 2 | 2 | 0 ppb |
| 2004-01-07 | 0.3 ppb | 4 | 3 | 0 to 1.18 ppb |
| 2004-01-06 | 0.08 ppb | 7 | 6 | 0 to 0.54 ppb |
| 2004-01-05 | 0 ppb | 1 | 1 | 0 ppb |