Total trihalomethanes (TTHMs)
U.S. Navy San Clemente Island
Trihalomethanes are cancer-causing contaminants that form during water treatment with chlorine and other disinfectants. The total trihalomethanes group includes four chemicals: chloroform, bromodichloromethane, dibromochloromethane and bromoform. Read More.
Studies conducted in the U.S. and Europe have found that drinking tap water that carries disinfection byproducts increases the risk of developing bladder cancer. In animal studies, all trihalomethanes cause liver, kidney and intestinal tumors. Some human epidemiological studies also reported an association between disinfection byproducts and an increased risk of problems during pregnancy, including spontaneous miscarriage, cardiovascular defects, neural tube defects and low birth weight.
The health guideline of 0.15 parts per billion, or ppb, for the group of four trihalomethanes, or THM4/TTHM, was defined in a peer-reviewed scientific study by EWG and represents a one-in-one-million lifetime cancer risk level.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 29.3 ppb | 60 | 60 | 2.00 ppb - 80.0 ppb |
| 2019 | 24.7 ppb | 60 | 60 | 1.70 ppb - 97.0 ppb |
| 2020 | 29.8 ppb | 55 | 55 | 2.20 ppb - 90.0 ppb |
| 2021 | 43.6 ppb | 60 | 60 | 4.00 ppb - 111.0 ppb |
| 2022 | 31.1 ppb | 100 | 99 | ND - 140.0 ppb |
| 2023 | 28.0 ppb | 108 | 105 | ND - 95.0 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.15 ppb
The health guideline of 0.15 parts per billion, or ppb, for the group of four trihalomethanes, or THM4/TTHM, was defined in a peer-reviewed scientific study by EWG and represents a one-in-one-million lifetime cancer risk level.
EPA Maximum Contaminant
Level (MCL): 80 ppb
The legal limit for the group of four trihalomethanes, established in 1998, was based on the need for residual disinfectant levels in water served to customers and the cost of treatment. This limit does not fully protect against the risk of cancer due to exposure to trihalomethanes.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-01-08 | CA3710707_DST_901-201801081015 | 26.0 ppb |
| 2018-01-08 | CA3710707_DST_902-201801080935 | 47.0 ppb |
| 2018-01-08 | CA3710707_DST_903-201801080720 | 63.0 ppb |
| 2018-01-08 | CA3710707_DST_900-201801080955 | 27.0 ppb |
| 2018-01-11 | CA3710707_DST_904-201801110930 | 12.0 ppb |
| 2018-02-04 | CA3710707_DST_901-201802040910 | 56.0 ppb |
| 2018-02-04 | CA3710707_DST_902-201802040830 | 54.0 ppb |
| 2018-02-04 | CA3710707_DST_903-201802040800 | 61.0 ppb |
| 2018-02-04 | CA3710707_DST_900-201802040920 | 55.0 ppb |
| 2018-02-06 | CA3710707_DST_904-201802060810 | 6.90 ppb |
| 2018-03-06 | CA3710707_DST_900-201803060925 | 40.0 ppb |
| 2018-03-06 | CA3710707_DST_901-201803060745 | 49.0 ppb |
| 2018-03-06 | CA3710707_DST_902-201803060900 | 20.0 ppb |
| 2018-03-06 | CA3710707_DST_903-201803060825 | 24.0 ppb |
| 2018-03-07 | CA3710707_DST_904-201803070808 | 11.0 ppb |
| 2018-04-02 | CA3710707_DST_903-201804020740 | 53.0 ppb |
| 2018-04-02 | CA3710707_DST_901-201804020850 | 46.0 ppb |
| 2018-04-02 | CA3710707_DST_900-201804020930 | 44.0 ppb |
| 2018-04-02 | CA3710707_DST_902-201804020815 | 49.0 ppb |
| 2018-04-04 | CA3710707_DST_904-201804040900 | 65.0 ppb |
| 2018-05-03 | CA3710707_DST_901-201805031520 | 19.0 ppb |
| 2018-05-03 | CA3710707_DST_902-201805031440 | 25.0 ppb |
| 2018-05-03 | CA3710707_DST_903-201805031355 | 71.0 ppb |
| 2018-05-03 | CA3710707_DST_900-201805031250 | 23.0 ppb |
| 2018-05-09 | CA3710707_DST_904-201805090810 | 4.80 ppb |
| 2018-06-03 | CA3710707_DST_901-201806031010 | 41.0 ppb |
| 2018-06-03 | CA3710707_DST_903-201806030930 | 25.0 ppb |
| 2018-06-03 | CA3710707_DST_902-201806031120 | 28.0 ppb |
| 2018-06-03 | CA3710707_DST_900-201806031100 | 19.0 ppb |
| 2018-06-06 | CA3710707_DST_904-201806060810 | 2.00 ppb |
| 2018-07-09 | CA3710707_DST_902-201807091550 | 4.40 ppb |
| 2018-07-09 | CA3710707_DST_903-201807091515 | 53.0 ppb |
| 2018-07-09 | CA3710707_DST_901-201807091645 | 20.0 ppb |
| 2018-07-09 | CA3710707_DST_900-201807091630 | 22.0 ppb |
| 2018-07-11 | CA3710707_DST_904-201807110900 | 4.10 ppb |
| 2018-08-08 | CA3710707_DST_903-201808080820 | 35.0 ppb |
| 2018-08-08 | CA3710707_DST_900-201808080730 | 23.0 ppb |
| 2018-08-08 | CA3710707_DST_901-201808080850 | 4.50 ppb |
| 2018-08-08 | CA3710707_DST_902-201808080750 | 38.0 ppb |
| 2018-08-08 | CA3710707_DST_904-201808080900 | 2.30 ppb |
| 2018-09-04 | CA3710707_DST_900-201809040940 | 25.0 ppb |
| 2018-09-04 | CA3710707_DST_901-201809041005 | 36.0 ppb |
| 2018-09-04 | CA3710707_DST_903-201809040845 | 80.0 ppb |
| 2018-09-04 | CA3710707_DST_902-201809040910 | 28.0 ppb |
| 2018-09-05 | CA3710707_DST_904-201809050730 | 3.70 ppb |
| 2018-10-02 | CA3710707_DST_903-201810020725 | 19.0 ppb |
| 2018-10-02 | CA3710707_DST_902-201810020820 | 46.0 ppb |
| 2018-10-02 | CA3710707_DST_900-201810020845 | 25.0 ppb |
| 2018-10-02 | CA3710707_DST_901-201810020915 | 22.0 ppb |
| 2018-10-03 | CA3710707_DST_904-201810030730 | 2.20 ppb |
| 2018-11-05 | CA3710707_DST_901-201811051550 | 41.0 ppb |
| 2018-11-05 | CA3710707_DST_900-201811051610 | 32.0 ppb |
| 2018-11-05 | CA3710707_DST_902-201811051530 | 24.0 ppb |
| 2018-11-05 | CA3710707_DST_903-201811051455 | 25.0 ppb |
| 2018-11-07 | CA3710707_DST_904-201811070710 | 2.70 ppb |
| 2018-12-01 | CA3710707_DST_900-201812010955 | 12.0 ppb |
| 2018-12-01 | CA3710707_DST_901-201812010930 | 18.0 ppb |
| 2018-12-01 | CA3710707_DST_902-201812011025 | 17.0 ppb |
| 2018-12-01 | CA3710707_DST_903-201812011400 | 20.0 ppb |
| 2018-12-05 | CA3710707_DST_904-201812050930 | 4.20 ppb |
| 2019-01-02 | CA3710707_DST_902-201901021455 | 28.0 ppb |
| 2019-01-02 | CA3710707_DST_903-201901021415 | 7.40 ppb |
| 2019-01-02 | CA3710707_DST_900-201901021515 | 24.0 ppb |
| 2019-01-03 | CA3710707_DST_901-201901030655 | 8.10 ppb |
| 2019-01-03 | CA3710707_DST_904-201901030730 | 5.20 ppb |
| 2019-02-07 | CA3710707_DST_904-201902071330 | 2.30 ppb |
| 2019-02-12 | CA3710707_DST_900-201902120855 | 12.0 ppb |
| 2019-02-12 | CA3710707_DST_903-201902120715 | 16.0 ppb |
| 2019-02-12 | CA3710707_DST_901-201902120910 | 13.0 ppb |
| 2019-02-12 | CA3710707_DST_902-201902120830 | 11.0 ppb |
| 2019-03-05 | CA3710707_DST_901-201903050730 | 15.0 ppb |
| 2019-03-05 | CA3710707_DST_900-201903050710 | 16.0 ppb |
| 2019-03-05 | CA3710707_DST_902-201903050650 | 8.40 ppb |
| 2019-03-05 | CA3710707_DST_903-201903050620 | 15.0 ppb |
| 2019-03-06 | CA3710707_DST_904-201903060720 | 1.70 ppb |
| 2019-04-08 | CA3710707_DST_902-201904080715 | 6.90 ppb |
| 2019-04-08 | CA3710707_DST_901-201904080730 | 16.0 ppb |
| 2019-04-08 | CA3710707_DST_900-201904080830 | 24.0 ppb |
| 2019-04-08 | CA3710707_DST_903-201904080755 | 11.0 ppb |
| 2019-04-11 | CA3710707_DST_904-201904110725 | 16.0 ppb |
| 2019-05-14 | CA3710707_DST_903-201905140715 | 47.0 ppb |
| 2019-05-14 | CA3710707_DST_902-201905140755 | 11.0 ppb |
| 2019-05-14 | CA3710707_DST_900-201905140815 | 49.0 ppb |
| 2019-05-14 | CA3710707_DST_901-201905140845 | 42.0 ppb |
| 2019-05-15 | CA3710707_DST_904-201905150720 | 5.70 ppb |
| 2019-06-03 | CA3710707_DST_901-201906031000 | 49.0 ppb |
| 2019-06-03 | CA3710707_DST_902-201906031030 | 19.0 ppb |
| 2019-06-03 | CA3710707_DST_900-201906031015 | 38.0 ppb |
| 2019-06-03 | CA3710707_DST_903-201906031100 | 17.0 ppb |
| 2019-06-05 | CA3710707_DST_904-201906051230 | 7.50 ppb |
| 2019-07-01 | CA3710707_DST_901-201907011430 | 39.0 ppb |
| 2019-07-01 | CA3710707_DST_900-201907011410 | 41.0 ppb |
| 2019-07-01 | CA3710707_DST_902-201907011345 | 13.0 ppb |
| 2019-07-01 | CA3710707_DST_903-201907011315 | 55.0 ppb |
| 2019-07-02 | CA3710707_DST_904-201907020805 | 24.0 ppb |
| 2019-08-05 | CA3710707_DST_903-201908051635 | 30.0 ppb |
| 2019-08-06 | CA3710707_DST_902-201908061230 | 8.80 ppb |
| 2019-08-06 | CA3710707_DST_900-201908061425 | 25.0 ppb |
| 2019-08-06 | CA3710707_DST_901-201908061510 | 23.0 ppb |
| 2019-08-07 | CA3710707_DST_904-201908070715 | 5.10 ppb |
| 2019-09-10 | CA3710707_DST_900-201909101355 | 30.0 ppb |
| 2019-09-10 | CA3710707_DST_901-201909101415 | 55.0 ppb |
| 2019-09-10 | CA3710707_DST_903-201909101327 | 28.0 ppb |
| 2019-09-10 | CA3710707_DST_904-201909100800 | 4.10 ppb |
| 2019-09-10 | CA3710707_DST_902-201909101300 | 1.90 ppb |
| 2019-10-08 | CA3710707_DST_901-201910081025 | 73.0 ppb |
| 2019-10-08 | CA3710707_DST_902-201910081035 | 44.0 ppb |
| 2019-10-08 | CA3710707_DST_900-201910081055 | 45.0 ppb |
| 2019-10-08 | CA3710707_DST_903-201910081010 | 17.0 ppb |
| 2019-10-09 | CA3710707_DST_904-201910090925 | 14.0 ppb |
| 2019-11-04 | CA3710707_DST_902-201911041010 | 4.70 ppb |
| 2019-11-04 | CA3710707_DST_903-201911041035 | 30.0 ppb |
| 2019-11-04 | CA3710707_DST_901-201911041100 | 97.0 ppb |
| 2019-11-04 | CA3710707_DST_900-201911040950 | 19.0 ppb |
| 2019-11-05 | CA3710707_DST_904-201911050745 | 7.70 ppb |
| 2019-12-06 | CA3710707_DST_903-201912061000 | 67.0 ppb |
| 2019-12-07 | CA3710707_DST_902-201912071140 | 40.0 ppb |
| 2019-12-07 | CA3710707_DST_900-201912071410 | 28.0 ppb |
| 2019-12-10 | CA3710707_DST_901-201912101635 | 46.0 ppb |
| 2019-12-11 | CA3710707_DST_904-201912110815 | 22.0 ppb |
| 2020-01-02 | CA3710707_DST_902-202001021625 | 2.20 ppb |
| 2020-01-02 | CA3710707_DST_901-202001021600 | 11.0 ppb |
| 2020-01-03 | CA3710707_DST_903-202001031140 | 90.0 ppb |
| 2020-01-03 | CA3710707_DST_900-202001031640 | 25.0 ppb |
| 2020-01-08 | CA3710707_DST_904-202001080715 | 14.0 ppb |
| 2020-02-02 | CA3710707_DST_900-202002021310 | 36.0 ppb |
| 2020-02-02 | CA3710707_DST_903-202002021245 | 37.0 ppb |
| 2020-02-03 | CA3710707_DST_902-202002030945 | 31.0 ppb |
| 2020-02-03 | CA3710707_DST_901-202002030640 | 29.0 ppb |
| 2020-02-05 | CA3710707_DST_904-202002050725 | 8.10 ppb |
| 2020-03-02 | CA3710707_DST_900-202003020635 | 37.0 ppb |
| 2020-03-02 | CA3710707_DST_903-202003020750 | 49.0 ppb |
| 2020-03-02 | CA3710707_DST_902-202003020715 | 26.0 ppb |
| 2020-03-02 | CA3710707_DST_901-202003020830 | 22.0 ppb |
| 2020-03-04 | CA3710707_DST_904-202003040730 | 8.00 ppb |
| 2020-04-11 | CA3710707_DST_901-202004110750 | 59.0 ppb |
| 2020-04-11 | CA3710707_DST_903-202004111418 | 32.0 ppb |
| 2020-04-11 | CA3710707_DST_900-202004110930 | 46.0 ppb |
| 2020-04-11 | CA3710707_DST_902-202004110955 | 8.70 ppb |
| 2020-04-15 | CA3710707_DST_904-202004150851 | 5.30 ppb |
| 2020-05-11 | CA3710707_DST_900-202005111550 | 30.0 ppb |
| 2020-05-11 | CA3710707_DST_902-202005111535 | 27.0 ppb |
| 2020-05-11 | CA3710707_DST_901-202005111605 | 25.0 ppb |
| 2020-05-11 | CA3710707_DST_903-202005111500 | 36.0 ppb |
| 2020-05-16 | CA3710707_DST_904-202005160730 | 6.80 ppb |
| 2020-06-16 | CA3710707_DST_902-202006160915 | 16.0 ppb |
| 2020-06-16 | CA3710707_DST_900-202006160930 | 14.0 ppb |
| 2020-06-16 | CA3710707_DST_901-202006160955 | 56.0 ppb |
| 2020-06-16 | CA3710707_DST_903-202006160830 | 20.0 ppb |
| 2020-06-17 | CA3710707_DST_904-202006170730 | 8.40 ppb |
| 2020-07-29 | CA3710707_DST_903-202007291009 | 39.0 ppb |
| 2020-07-29 | CA3710707_DST_904-202007290931 | 18.0 ppb |
| 2020-07-29 | CA3710707_DST_901-202007290943 | 18.0 ppb |
| 2020-07-30 | CA3710707_DST_902-202007300815 | 36.0 ppb |
| 2020-07-30 | CA3710707_DST_900-202007300830 | 57.0 ppb |
| 2020-08-03 | CA3710707_DST_900-202008031345 | 60.0 ppb |
| 2020-08-03 | CA3710707_DST_901-202008030935 | 55.0 ppb |
| 2020-08-03 | CA3710707_DST_902-202008031320 | 15.0 ppb |
| 2020-08-03 | CA3710707_DST_903-202008030900 | 31.0 ppb |
| 2020-08-04 | CA3710707_DST_904-202008040800 | 19.0 ppb |
| 2020-10-06 | CA3710707_DST_900-202010061345 | 64.0 ppb |
| 2020-10-06 | CA3710707_DST_902-202010061430 | 11.0 ppb |
| 2020-10-06 | CA3710707_DST_903-202010061410 | 68.0 ppb |
| 2020-10-06 | CA3710707_DST_901-202010061320 | 55.0 ppb |
| 2020-10-07 | CA3710707_DST_904-202010070840 | 12.0 ppb |
| 2020-11-04 | CA3710707_DST_902-202011040815 | 11.0 ppb |
| 2020-11-04 | CA3710707_DST_904-202011040910 | 15.0 ppb |
| 2020-11-04 | CA3710707_DST_901-202011040840 | 23.0 ppb |
| 2020-11-04 | CA3710707_DST_900-202011040855 | 23.0 ppb |
| 2020-11-04 | CA3710707_DST_903-202011040750 | 15.0 ppb |
| 2020-12-06 | CA3710707_DST_901-202012061055 | 59.0 ppb |
| 2020-12-06 | CA3710707_DST_902-202012061025 | 30.0 ppb |
| 2020-12-06 | CA3710707_DST_903-202012060955 | 32.0 ppb |
| 2020-12-06 | CA3710707_DST_900-202012061040 | 49.0 ppb |
| 2020-12-09 | CA3710707_DST_904-202012091005 | 7.90 ppb |
| 2021-01-05 | CA3710707_DST_903-202101050900 | 22.0 ppb |
| 2021-01-05 | CA3710707_DST_900-202101051050 | 27.0 ppb |
| 2021-01-05 | CA3710707_DST_901-202101050800 | 17.0 ppb |
| 2021-01-05 | CA3710707_DST_902-202101051025 | 10.00 ppb |
| 2021-01-06 | CA3710707_DST_904-202101060740 | 9.30 ppb |
| 2021-02-01 | CA3710707_DST_903-202102010535 | 27.0 ppb |
| 2021-02-01 | CA3710707_DST_900-202102010635 | 48.0 ppb |
| 2021-02-01 | CA3710707_DST_902-202102010610 | 24.0 ppb |
| 2021-02-01 | CA3710707_DST_901-202102010710 | 44.0 ppb |
| 2021-02-03 | CA3710707_DST_904-202102030725 | 6.90 ppb |
| 2021-03-11 | CA3710707_DST_900-202103110715 | 40.0 ppb |
| 2021-03-11 | CA3710707_DST_901-202103110830 | 46.0 ppb |
| 2021-03-11 | CA3710707_DST_902-202103110810 | 23.0 ppb |
| 2021-03-11 | CA3710707_DST_903-202103110745 | 21.0 ppb |
| 2021-03-11 | CA3710707_DST_904-202103110920 | 13.0 ppb |
| 2021-04-14 | CA3710707_DST_904-202104141045 | 15.0 ppb |
| 2021-04-17 | CA3710707_DST_902-202104170915 | 43.0 ppb |
| 2021-04-17 | CA3710707_DST_901-202104170935 | 44.0 ppb |
| 2021-04-17 | CA3710707_DST_900-202104170810 | 44.0 ppb |
| 2021-04-17 | CA3710707_DST_903-202104170830 | 44.0 ppb |
| 2021-05-10 | CA3710707_DST_903-202105101305 | 32.0 ppb |
| 2021-05-10 | CA3710707_DST_901-202105101415 | 66.0 ppb |
| 2021-05-10 | CA3710707_DST_902-202105101330 | 53.0 ppb |
| 2021-05-10 | CA3710707_DST_900-202105101350 | 60.0 ppb |
| 2021-05-12 | CA3710707_DST_904-202105120820 | 10.00 ppb |
| 2021-06-04 | CA3710707_DST_900-202106041050 | 50.0 ppb |
| 2021-06-04 | CA3710707_DST_901-202106041200 | 69.0 ppb |
| 2021-06-04 | CA3710707_DST_903-202106041000 | 41.0 ppb |
| 2021-06-06 | CA3710707_DST_902-202106060940 | 62.0 ppb |
| 2021-06-09 | CA3710707_DST_904-202106090840 | 15.0 ppb |
| 2021-07-05 | CA3710707_DST_901-202107051030 | 111.0 ppb |
| 2021-07-06 | CA3710707_DST_900-202107061600 | 83.0 ppb |
| 2021-07-06 | CA3710707_DST_902-202107061450 | 85.0 ppb |
| 2021-07-06 | CA3710707_DST_903-202107061520 | 45.0 ppb |
| 2021-07-07 | CA3710707_DST_904-202107070740 | 10.00 ppb |
| 2021-08-03 | CA3710707_DST_901-202108031410 | 100.0 ppb |
| 2021-08-03 | CA3710707_DST_902-202108031330 | 9.90 ppb |
| 2021-08-03 | CA3710707_DST_900-202108031350 | 59.0 ppb |
| 2021-08-03 | CA3710707_DST_903-202108031300 | 43.0 ppb |
| 2021-08-04 | CA3710707_DST_904-202108040805 | 19.0 ppb |
| 2021-09-14 | CA3710707_DST_902-202109141330 | 4.00 ppb |
| 2021-09-14 | CA3710707_DST_900-202109141215 | 88.0 ppb |
| 2021-09-14 | CA3710707_DST_901-202109141350 | 110.0 ppb |
| 2021-09-14 | CA3710707_DST_903-202109141250 | 54.0 ppb |
| 2021-09-15 | CA3710707_DST_904-202109150730 | 14.0 ppb |
| 2021-10-07 | CA3710707_DST_904-202110070725 | 13.0 ppb |
| 2021-10-08 | CA3710707_DST_903-202110080720 | 59.0 ppb |
| 2021-10-11 | CA3710707_DST_902-202110111425 | 34.0 ppb |
| 2021-10-11 | CA3710707_DST_900-202110111600 | 54.0 ppb |
| 2021-10-11 | CA3710707_DST_901-202110111625 | 55.0 ppb |
| 2021-11-02 | CA3710707_DST_900-202111021525 | 68.0 ppb |
| 2021-11-02 | CA3710707_DST_901-202111021500 | 56.0 ppb |
| 2021-11-02 | CA3710707_DST_902-202111021425 | 11.0 ppb |
| 2021-11-02 | CA3710707_DST_903-202111021400 | 35.0 ppb |
| 2021-11-03 | CA3710707_DST_904-202111030810 | 16.0 ppb |
| 2021-12-08 | CA3710707_DST_904-202112080730 | 93.0 ppb |
| 2021-12-09 | CA3710707_DST_900-202112091040 | 64.0 ppb |
| 2021-12-09 | CA3710707_DST_901-202112091015 | 61.0 ppb |
| 2021-12-09 | CA3710707_DST_902-202112090930 | 70.0 ppb |
| 2021-12-09 | CA3710707_DST_903-202112090900 | 64.0 ppb |
| 2022-01-04 | CA3710707_DST_904-202201040720 | 16.0 ppb |
| 2022-01-07 | CA3710707_DST_900-202201070730 | 26.0 ppb |
| 2022-01-07 | CA3710707_DST_902-202201070700 | 29.0 ppb |
| 2022-01-07 | CA3710707_DST_901-202201070740 | 31.0 ppb |
| 2022-01-07 | CA3710707_DST_903-202201070645 | 24.0 ppb |
| 2022-02-09 | CA3710707_DST_900-202202090825 | 65.0 ppb |
| 2022-02-09 | CA3710707_DST_901-202202090810 | 46.0 ppb |
| 2022-02-09 | CA3710707_DST_902-202202090715 | 32.0 ppb |
| 2022-02-09 | CA3710707_DST_903-202202090740 | 83.0 ppb |
| 2022-02-09 | CA3710707_DST_904-202202090730 | 56.0 ppb |
| 2022-03-01 | CA3710707_DST_900-202203010725 | 48.0 ppb |
| 2022-03-01 | CA3710707_DST_903-202203010620 | 47.0 ppb |
| 2022-03-01 | CA3710707_DST_901-202203010530 | 44.0 ppb |
| 2022-03-01 | CA3710707_DST_902-202203010700 | 32.0 ppb |
| 2022-03-02 | CA3710707_DST_904-202203020730 | 11.0 ppb |
| 2022-03-13 | CA3710707_004_004-202203130930 | 50.0 ppb |
| 2022-03-13 | CA3710707_005_005-202203130910 | 15.0 ppb |
| 2022-03-13 | CA3710707_006_006-202203130850 | ND |
| 2022-03-13 | CA3710707_007_007-202203130800 | 15.0 ppb |
| 2022-04-04 | CA3710707_DST_902-202204040830 | 2.40 ppb |
| 2022-04-04 | CA3710707_DST_901-202204040740 | 46.0 ppb |
| 2022-04-04 | CA3710707_004_004-202204040800 | 39.0 ppb |
| 2022-04-04 | CA3710707_005_005-202204040815 | 18.0 ppb |
| 2022-04-04 | CA3710707_DST_903-202204040940 | 90.0 ppb |
| 2022-04-04 | CA3710707_006_006-202204040840 | 2.30 ppb |
| 2022-04-04 | CA3710707_007_007-202204040855 | 18.0 ppb |
| 2022-04-04 | CA3710707_DST_900-202204040955 | 42.0 ppb |
| 2022-04-06 | CA3710707_DST_904-202204060600 | 13.0 ppb |
| 2022-05-13 | CA3710707_DST_904-202205130730 | 13.0 ppb |
| 2022-05-15 | CA3710707_007_007-202205150810 | 16.0 ppb |
| 2022-05-15 | CA3710707_004_004-202205150945 | 22.0 ppb |
| 2022-05-15 | CA3710707_DST_903-202205150830 | 51.0 ppb |
| 2022-05-15 | CA3710707_006_006-202205150900 | 3.90 ppb |
| 2022-05-15 | CA3710707_DST_901-202205151000 | 56.0 ppb |
| 2022-05-15 | CA3710707_005_005-202205150930 | 21.0 ppb |
| 2022-05-15 | CA3710707_DST_900-202205150945 | 41.0 ppb |
| 2022-05-15 | CA3710707_DST_902-202205150910 | 4.00 ppb |
| 2022-06-08 | CA3710707_DST_904-202206080740 | 13.0 ppb |
| 2022-06-09 | CA3710707_007_007-202206090905 | 18.0 ppb |
| 2022-06-09 | CA3710707_004_004-202206091530 | 41.0 ppb |
| 2022-06-09 | CA3710707_006_006-202206091150 | 7.00 ppb |
| 2022-06-09 | CA3710707_DST_901-202206091550 | 140.0 ppb |
| 2022-06-09 | CA3710707_005_005-202206091345 | 19.0 ppb |
| 2022-06-09 | CA3710707_DST_900-202206091410 | 29.0 ppb |
| 2022-06-09 | CA3710707_DST_902-202206091010 | 7.60 ppb |
| 2022-06-09 | CA3710707_DST_903-202206090825 | 55.0 ppb |
| 2022-07-02 | CA3710707_DST_903-202207020925 | 48.0 ppb |
| 2022-07-02 | CA3710707_004_004-202207021415 | 37.0 ppb |
| 2022-07-02 | CA3710707_005_005-202207021315 | 20.0 ppb |
| 2022-07-02 | CA3710707_006_006-202207021125 | 5.40 ppb |
| 2022-07-02 | CA3710707_007_007-202207020955 | 25.0 ppb |
| 2022-07-02 | CA3710707_DST_902-202207021250 | 6.80 ppb |
| 2022-07-03 | CA3710707_DST_900-202207031440 | 61.0 ppb |
| 2022-07-03 | CA3710707_DST_901-202207031500 | 74.0 ppb |
| 2022-07-07 | CA3710707_DST_904-202207070740 | 15.0 ppb |
| 2022-08-08 | CA3710707_004_004-202208080730 | 52.0 ppb |
| 2022-08-08 | CA3710707_005_005-202208080900 | 16.0 ppb |
| 2022-08-08 | CA3710707_006_006-202208080830 | 24.0 ppb |
| 2022-08-08 | CA3710707_007_007-202208080740 | 20.0 ppb |
| 2022-08-08 | CA3710707_DST_901-202208080915 | 46.0 ppb |
| 2022-08-08 | CA3710707_DST_902-202208080840 | 24.0 ppb |
| 2022-08-08 | CA3710707_DST_900-202208081000 | 49.0 ppb |
| 2022-08-08 | CA3710707_DST_903-202208080940 | 69.0 ppb |
| 2022-08-09 | CA3710707_DST_904-202208090855 | 12.0 ppb |
| 2022-09-06 | CA3710707_004_004-202209060645 | 64.0 ppb |
| 2022-09-06 | CA3710707_005_005-202209060700 | 18.0 ppb |
| 2022-09-06 | CA3710707_006_006-202209060715 | 16.0 ppb |
| 2022-09-06 | CA3710707_007_007-202209060735 | 21.0 ppb |
| 2022-09-06 | CA3710707_DST_902-202209060720 | 15.0 ppb |
| 2022-09-06 | CA3710707_DST_901-202209060835 | 140.0 ppb |
| 2022-09-06 | CA3710707_DST_903-202209060800 | 33.0 ppb |
| 2022-09-06 | CA3710707_DST_900-202209060820 | 55.0 ppb |
| 2022-09-07 | CA3710707_DST_904-202209070715 | 5.80 ppb |
| 2022-10-08 | CA3710707_004_004-202210081120 | 53.0 ppb |
| 2022-10-08 | CA3710707_005_005-202210081030 | 13.0 ppb |
| 2022-10-08 | CA3710707_006_006-202210080955 | 5.10 ppb |
| 2022-10-08 | CA3710707_007_007-202210080830 | 7.80 ppb |
| 2022-10-08 | CA3710707_DST_903-202210080800 | 28.0 ppb |
| 2022-10-09 | CA3710707_DST_902-202210091540 | 18.0 ppb |
| 2022-10-09 | CA3710707_DST_900-202210091625 | 48.0 ppb |
| 2022-10-09 | CA3710707_DST_901-202210091640 | 60.0 ppb |
| 2022-10-12 | CA3710707_DST_904-202210120800 | 13.0 ppb |
| 2022-11-17 | CA3710707_006_006-202211171350 | 7.60 ppb |
| 2022-11-17 | CA3710707_DST_903-202211171055 | 46.0 ppb |
| 2022-11-17 | CA3710707_007_007-202211171130 | 12.0 ppb |
| 2022-11-17 | CA3710707_004_004-202211171515 | 45.0 ppb |
| 2022-11-17 | CA3710707_005_005-202211171430 | 21.0 ppb |
| 2022-11-18 | CA3710707_DST_901-202211180900 | 16.0 ppb |
| 2022-11-18 | CA3710707_DST_902-202211180810 | 15.0 ppb |
| 2022-11-18 | CA3710707_DST_900-202211180840 | 26.0 ppb |
| 2022-11-22 | CA3710707_DST_904-202211220840 | 6.50 ppb |
| 2022-12-03 | CA3710707_DST_903-202212030800 | 31.0 ppb |
| 2022-12-03 | CA3710707_004_004-202212031100 | 25.0 ppb |
| 2022-12-03 | CA3710707_006_006-202212030915 | 5.20 ppb |
| 2022-12-03 | CA3710707_005_005-202212030945 | 17.0 ppb |
| 2022-12-03 | CA3710707_007_007-202212030830 | 18.0 ppb |
| 2022-12-05 | CA3710707_DST_901-202212050855 | 27.0 ppb |
| 2022-12-05 | CA3710707_DST_900-202212050915 | 32.0 ppb |
| 2022-12-05 | CA3710707_DST_902-202212050805 | 27.0 ppb |
| 2022-12-07 | CA3710707_DST_904-202212070710 | 13.0 ppb |
| 2023-01-16 | CA3710707_006_006-202301161054 | ND |
| 2023-01-16 | CA3710707_005_005-202301161130 | 11.0 ppb |
| 2023-01-16 | CA3710707_DST_903-202301160950 | 16.0 ppb |
| 2023-01-16 | CA3710707_004_004-202301161220 | 20.0 ppb |
| 2023-01-16 | CA3710707_007_007-202301161025 | 7.80 ppb |
| 2023-01-16 | CA3710707_DST_902-202301161115 | 33.0 ppb |
| 2023-01-18 | CA3710707_DST_901-202301181545 | 35.0 ppb |
| 2023-01-19 | CA3710707_DST_904-202301190815 | 8.20 ppb |
| 2023-02-15 | CA3710707_DST_901-202302151400 | 28.0 ppb |
| 2023-02-16 | CA3710707_DST_904-202302160800 | 11.0 ppb |
| 2023-02-19 | CA3710707_DST_903-202302190945 | 21.0 ppb |
| 2023-02-19 | CA3710707_007_007-202302190930 | 19.0 ppb |
| 2023-02-19 | CA3710707_DST_900-202302190820 | 42.0 ppb |
| 2023-02-19 | CA3710707_005_005-202302190900 | 18.0 ppb |
| 2023-02-19 | CA3710707_006_006-202302190910 | 2.40 ppb |
| 2023-02-19 | CA3710707_004_004-202302190805 | 37.0 ppb |
| 2023-02-19 | CA3710707_DST_902-202302190840 | 2.20 ppb |
| 2023-03-08 | CA3710707_007_007-202303081340 | 17.0 ppb |
| 2023-03-08 | CA3710707_005_005-202303081445 | 16.0 ppb |
| 2023-03-08 | CA3710707_DST_903-202303081240 | 21.0 ppb |
| 2023-03-09 | CA3710707_DST_904-202303090745 | 21.0 ppb |
| 2023-03-10 | CA3710707_006_006-202303101400 | 2.60 ppb |
| 2023-03-10 | CA3710707_004_004-202303101450 | 23.0 ppb |
| 2023-03-11 | CA3710707_DST_900-202303111200 | 31.0 ppb |
| 2023-03-11 | CA3710707_DST_902-202303111130 | 16.0 ppb |
| 2023-03-14 | CA3710707_DST_901-202303140850 | 41.0 ppb |
| 2023-04-07 | CA3710707_DST_903-202304071120 | 26.0 ppb |
| 2023-04-07 | CA3710707_007_007-202304071145 | 18.0 ppb |
| 2023-04-08 | CA3710707_005_005-202304081155 | 24.0 ppb |
| 2023-04-08 | CA3710707_DST_902-202304081125 | 20.0 ppb |
| 2023-04-08 | CA3710707_006_006-202304081110 | 9.10 ppb |
| 2023-04-09 | CA3710707_004_004-202304091410 | 26.0 ppb |
| 2023-04-09 | CA3710707_DST_900-202304091415 | 40.0 ppb |
| 2023-04-11 | CA3710707_DST_901-202304111100 | 32.0 ppb |
| 2023-04-14 | CA3710707_DST_904-202304140725 | 19.0 ppb |
| 2023-05-03 | CA3710707_DST_904-202305031030 | 16.0 ppb |
| 2023-05-03 | CA3710707_DST_903-202305031345 | 39.0 ppb |
| 2023-05-03 | CA3710707_007_007-202305031415 | 17.0 ppb |
| 2023-05-03 | CA3710707_006_006-202305031430 | 28.0 ppb |
| 2023-05-03 | CA3710707_DST_902-202305031450 | 49.0 ppb |
| 2023-05-05 | CA3710707_005_005-202305051100 | 95.0 ppb |
| 2023-05-05 | CA3710707_004_004-202305051140 | 47.0 ppb |
| 2023-05-05 | CA3710707_DST_900-202305051125 | 46.0 ppb |
| 2023-05-08 | CA3710707_DST_901-202305080710 | 61.0 ppb |
| 2023-06-01 | CA3710707_007_007-202306011515 | 37.0 ppb |
| 2023-06-01 | CA3710707_DST_903-202306011450 | 42.0 ppb |
| 2023-06-01 | CA3710707_DST_902-202306011540 | 33.0 ppb |
| 2023-06-02 | CA3710707_DST_900-202306021035 | 43.0 ppb |
| 2023-06-02 | CA3710707_005_005-202306021015 | 26.0 ppb |
| 2023-06-02 | CA3710707_006_006-202306020940 | 10.00 ppb |
| 2023-06-03 | CA3710707_004_004-202306031450 | 49.0 ppb |
| 2023-06-04 | CA3710707_DST_901-202306041500 | 51.0 ppb |
| 2023-06-07 | CA3710707_DST_904-202306070735 | 20.0 ppb |
| 2023-07-01 | CA3710707_DST_902-202307011035 | 26.0 ppb |
| 2023-07-01 | CA3710707_006_006-202307011010 | 4.40 ppb |
| 2023-07-01 | CA3710707_007_007-202307010930 | 13.0 ppb |
| 2023-07-01 | CA3710707_DST_903-202307010905 | 24.0 ppb |
| 2023-07-02 | CA3710707_004_004-202307021015 | 28.0 ppb |
| 2023-07-02 | CA3710707_005_005-202307020945 | 8.90 ppb |
| 2023-07-02 | CA3710707_DST_900-202307021115 | 13.0 ppb |
| 2023-07-04 | CA3710707_DST_901-202307041345 | 35.0 ppb |
| 2023-07-06 | CA3710707_DST_904-202307061035 | 31.0 ppb |
| 2023-07-25 | CA3710707_DST_903-202307251535 | 61.0 ppb |
| 2023-08-13 | CA3710707_007_007-202308131305 | 12.0 ppb |
| 2023-08-13 | CA3710707_DST_902-202308131550 | 30.0 ppb |
| 2023-08-13 | CA3710707_006_006-202308131525 | 24.0 ppb |
| 2023-08-13 | CA3710707_DST_903-202308131240 | 70.0 ppb |
| 2023-08-14 | CA3710707_004_004-202308141045 | 77.0 ppb |
| 2023-08-14 | CA3710707_DST_900-202308141030 | 67.0 ppb |
| 2023-08-14 | CA3710707_005_005-202308141000 | 20.0 ppb |
| 2023-08-15 | CA3710707_DST_901-202308150830 | 17.0 ppb |
| 2023-08-15 | CA3710707_DST_904-202308150745 | 17.0 ppb |
| 2023-09-07 | CA3710707_004_004-202309071400 | 57.0 ppb |
| 2023-09-07 | CA3710707_007_007-202309071030 | 12.0 ppb |
| 2023-09-07 | CA3710707_DST_900-202309071320 | 41.0 ppb |
| 2023-09-07 | CA3710707_006_006-202309071100 | ND |
| 2023-09-07 | CA3710707_005_005-202309071310 | 17.0 ppb |
| 2023-09-07 | CA3710707_DST_902-202309071115 | 19.0 ppb |
| 2023-09-07 | CA3710707_DST_903-202309071000 | 27.0 ppb |
| 2023-09-11 | CA3710707_DST_901-202309111445 | 68.0 ppb |
| 2023-09-13 | CA3710707_DST_904-202309131010 | 14.0 ppb |
| 2023-10-05 | CA3710707_007_007-202310050920 | 10.00 ppb |
| 2023-10-05 | CA3710707_DST_902-202310051020 | 43.0 ppb |
| 2023-10-05 | CA3710707_006_006-202310050950 | 4.60 ppb |
| 2023-10-05 | CA3710707_DST_903-202310050835 | 37.0 ppb |
| 2023-10-06 | CA3710707_DST_900-202310061015 | 30.0 ppb |
| 2023-10-06 | CA3710707_004_004-202310061035 | 30.0 ppb |
| 2023-10-06 | CA3710707_005_005-202310060935 | 15.0 ppb |
| 2023-10-10 | CA3710707_DST_901-202310100810 | 33.0 ppb |
| 2023-10-11 | CA3710707_DST_904-202310110715 | 26.0 ppb |
| 2023-11-04 | CA3710707_DST_900-202311041045 | 24.0 ppb |
| 2023-11-04 | CA3710707_DST_902-202311041000 | 13.0 ppb |
| 2023-11-04 | CA3710707_004_004-202311041250 | 50.0 ppb |
| 2023-11-04 | CA3710707_005_005-202311041025 | 11.0 ppb |
| 2023-11-04 | CA3710707_007_007-202311040920 | 7.60 ppb |
| 2023-11-04 | CA3710707_DST_901-202311041320 | 62.0 ppb |
| 2023-11-04 | CA3710707_006_006-202311040940 | ND |
| 2023-11-04 | CA3710707_DST_903-202311040850 | 16.0 ppb |
| 2023-11-09 | CA3710707_DST_904-202311090715 | 34.0 ppb |
| 2023-12-06 | CA3710707_DST_904-202312061015 | 37.0 ppb |
| 2023-12-10 | CA3710707_DST_900-202312101605 | 39.0 ppb |
| 2023-12-10 | CA3710707_DST_901-202312101650 | 59.0 ppb |
| 2023-12-10 | CA3710707_006_006-202312101455 | 22.0 ppb |
| 2023-12-10 | CA3710707_005_005-202312101515 | 13.0 ppb |
| 2023-12-10 | CA3710707_004_004-202312101625 | 56.0 ppb |
| 2023-12-10 | CA3710707_007_007-202312101535 | 16.0 ppb |
| 2023-12-10 | CA3710707_DST_902-202312101440 | 23.0 ppb |
| 2023-12-10 | CA3710707_DST_903-202312101410 | 57.0 ppb |