Nitrate
City of Shafter
Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 5.18 ppm | 6 | 6 | 2.17 ppm - 7.91 ppm |
2015 | 7.88 ppm | 19 | 19 | 2.40 ppm - 11.0 ppm |
2016 | 7.41 ppm | 30 | 30 | 2.60 ppm - 12.2 ppm |
2017 | 6.33 ppm | 1 | 1 | 6.33 ppm |
2018 | 6.85 ppm | 64 | 63 | ND - 10.1 ppm |
2019 | 5.19 ppm | 116 | 116 | 0.120 ppm - 8.40 ppm |
ppm = parts per million
State and national drinking water standards and health guidelines
EWG Health Guideline 0.14 ppm
The EWG Health Guideline of 0.14 ppm for nitrate was defined by EWG . This health guideline protects against cancer and harm to fetal growth and development.
EPA Maximum Contaminant
Level (MCL) 10 ppm
The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.
ppm = parts per million
All test results
Date | Lab ID | Result |
---|---|---|
2014-01-29 | 5806-007-1330 | 3.39 ppm |
2014-02-27 | 5806-019-1100 | 4.07 ppm |
2014-04-30 | 5806-017-1030 | 2.17 ppm |
2014-08-28 | 5806-003-0820 | 7.91 ppm |
2014-08-28 | 5806-004-1215 | 6.33 ppm |
2014-10-30 | 5806-008-1140 | 7.23 ppm |
2015-01-28 | 5806-007-1145 | 7.91 ppm |
2015-05-28 | 5806-016-0920 | 7.68 ppm |
2015-06-30 | 5806-003-0930 | 9.94 ppm |
2015-06-30 | 5806-004-1135 | 10.8 ppm |
2015-07-29 | 5806-004-1120 | 7.00 ppm |
2015-08-27 | 5806-004-0944 | 6.60 ppm |
2015-09-30 | 5806-004-0930 | 6.60 ppm |
2015-09-30 | 5806-008-1100 | 6.30 ppm |
2015-10-28 | 5806-004-1040 | 11.0 ppm |
2015-11-09 | 5806-004-1150 | 11.0 ppm |
2015-11-12 | 5806-004-1410 | 7.60 ppm |
2015-11-12 | 5806-008-1445 | 7.70 ppm |
2015-11-12 | 5806-017-1425 | 2.40 ppm |
2015-11-17 | 5806-016-1430 | 8.20 ppm |
2015-11-24 | 5806-016-1155 | 8.30 ppm |
2015-12-01 | 5806-016-1250 | 8.10 ppm |
2015-12-10 | 5806-021-1030 | 6.60 ppm |
2015-12-15 | 5806-016-1340 | 8.10 ppm |
2015-12-22 | 5806-016-1133 | 7.80 ppm |
2016-01-26 | 5867-003-1110 | 10.2 ppm |
2016-01-26 | 5867-007-1140 | 8.50 ppm |
2016-02-04 | 5867-003-1230 | 7.30 ppm |
2016-02-09 | 5867-003-1130 | 9.50 ppm |
2016-02-16 | 5806-003-1415 | 7.20 ppm |
2016-02-23 | 5867-003-0920 | 7.20 ppm |
2016-02-23 | 5867-007-1225 | 5.40 ppm |
2016-03-01 | 5867-003-1056 | 9.50 ppm |
2016-03-08 | 5867-003-1015 | 9.60 ppm |
2016-03-10 | 5806-021-1100 | 8.50 ppm |
2016-03-15 | 5867-003-1012 | 7.60 ppm |
2016-03-22 | 5867-003-1035 | 7.70 ppm |
2016-03-29 | 5867-003-1000 | 6.80 ppm |
2016-03-29 | 5867-007-1340 | 7.00 ppm |
2016-04-05 | 5867-003-1145 | 12.2 ppm |
2016-04-26 | 5867-007-1255 | 7.50 ppm |
2016-04-26 | 5867-021-1057 | 4.00 ppm |
2016-05-24 | 5867-007-1350 | 7.90 ppm |
2016-05-24 | 5867-008-1210 | 7.50 ppm |
2016-05-24 | 5867-017-1240 | 2.70 ppm |
2016-05-24 | 5867-021-1320 | 8.10 ppm |
2016-06-21 | 5867-007-1210 | 7.80 ppm |
2016-07-19 | 5867-007-1130 | 4.60 ppm |
2016-07-19 | 5867-008-1145 | 6.90 ppm |
2016-07-19 | 5867-017-1235 | 2.60 ppm |
2016-07-19 | 5867-021-1210 | 3.20 ppm |
2016-08-16 | 5867-016-1200 | 8.40 ppm |
2016-11-01 | 5867-004-1120 | 11.5 ppm |
2016-12-20 | 5867-016-1030 | 7.40 ppm |
2016-12-27 | 5867-016-1155 | 8.00 ppm |
2017-06-01 | 6.33 ppm* | |
2018-01-03 | 5867-016-1036 | 7.10 ppm |
2018-01-09 | 5867-016-1139 | 7.20 ppm |
2018-01-16 | 5867-016-0850 | 7.30 ppm |
2018-01-23 | 5867-016-0930 | 7.40 ppm |
2018-01-23 | 5867-021-1315 | ND |
2018-01-30 | 5867-016-0900 | 7.10 ppm |
2018-02-06 | 5867-016-0835 | 7.60 ppm |
2018-02-12 | 5867-016-0900 | 7.30 ppm |
2018-02-20 | 5867-016-0810 | 7.50 ppm |
2018-02-26 | 5867-016-1025 | 7.60 ppm |
2018-03-06 | 5867-016-0815 | 7.60 ppm |
2018-03-13 | 5867-016-0835 | 7.40 ppm |
2018-03-20 | 5867-016-1000 | 7.30 ppm |
2018-03-28 | 5867-008-1315 | 5.70 ppm |
2018-03-28 | 5867-016-0920 | 7.50 ppm |
2018-03-28 | 5867-017-1245 | 2.60 ppm |
2018-03-28 | 5867-021-1335 | 2.00 ppm |
2018-04-03 | 5867-016-1005 | 7.40 ppm |
2018-04-10 | 5867-016-0815 | 7.10 ppm |
2018-04-17 | 5867-016-0840 | 6.90 ppm |
2018-04-24 | 5867-016-0830 | 7.30 ppm |
2018-04-24 | 5867-021-1115 | 3.00 ppm |
2018-05-01 | 5867-016-0930 | 7.10 ppm |
2018-05-08 | 5867-016-0900 | 7.10 ppm |
2018-05-15 | 5867-016-0850 | 7.30 ppm |
2018-05-22 | 5867-016-0900 | 6.90 ppm |
2018-05-29 | 5867-016-0840 | 7.80 ppm |
2018-06-05 | 5867-016-0745 | 7.70 ppm |
2018-06-12 | 5867-016-1004 | 7.50 ppm |
2018-06-19 | 5867-016-0800 | 7.60 ppm |
2018-06-27 | 5867-016-0715 | 7.80 ppm |
2018-07-05 | 5867-016-0700 | 8.20 ppm |
2018-07-10 | 5867-016-0720 | 7.60 ppm |
2018-07-13 | 5806-025-0900 | 1.60 ppm |
2018-07-17 | 5867-016-0730 | 8.30 ppm |
2018-07-24 | 5867-007-0915 | 10.1 ppm |
2018-07-24 | 5867-016-0730 | 8.10 ppm |
2018-07-24 | 5867-021-1010 | 3.40 ppm |
2018-07-24 | 5867-021-1015 | 3.40 ppm |
2018-07-31 | 5867-016-0830 | 7.60 ppm |
2018-08-02 | 5867-007-1400 | 9.40 ppm |
2018-08-07 | 5867-016-0800 | 7.80 ppm |
2018-08-14 | 5867-016-0835 | 7.50 ppm |
2018-08-21 | 5867-016-1000 | 7.50 ppm |
2018-08-28 | 5867-016-0720 | 7.60 ppm |
2018-09-06 | 5867-016-0800 | 7.40 ppm |
2018-09-11 | 5867-016-0730 | 7.60 ppm |
2018-09-18 | 5867-016-0950 | 7.10 ppm |
2018-09-25 | 5867-016-0900 | 7.30 ppm |
2018-10-02 | 5867-016-0800 | 7.40 ppm |
2018-10-09 | 5867-016-0910 | 7.20 ppm |
2018-10-16 | 5867-016-0900 | 7.50 ppm |
2018-10-23 | 5867-016-0805 | 7.10 ppm |
2018-10-23 | 5867-021-1140 | 2.90 ppm |
2018-10-30 | 5867-016-0900 | 7.40 ppm |
2018-11-06 | 5867-016-0930 | 7.30 ppm |
2018-11-08 | 5806-023-0810 | 8.60 ppm |
2018-11-15 | 5867-016-1115 | 7.20 ppm |
2018-11-19 | 5867-016-1033 | 7.50 ppm |
2018-11-27 | 5867-016-1154 | 7.20 ppm |
2018-12-04 | 5867-016-0830 | 7.20 ppm |
2018-12-11 | 5867-016-0810 | 7.30 ppm |
2018-12-18 | 5867-016-0830 | 7.20 ppm |
2018-12-26 | 5867-016-0840 | 7.40 ppm |
2019-01-02 | 5867-016-0855 | 7.50 ppm |
2019-01-08 | 5867-016-0924 | 7.50 ppm |
2019-01-15 | 5867-016-0825 | 7.30 ppm |
2019-01-22 | 5867-016-0835 | 7.50 ppm |
2019-01-23 | 5806-007-0945 | 2.40 ppm |
2019-01-23 | 5806-008-1055 | 5.10 ppm |
2019-01-23 | 5806-017-1020 | 4.00 ppm |
2019-01-23 | 5806-021-1130 | 0.120 ppm |
2019-01-23 | 5806-023-0850 | 6.90 ppm |
2019-01-29 | 5867-016-0800 | 7.70 ppm |
2019-02-05 | 5867-016-0830 | 7.40 ppm |
2019-02-12 | 5867-016-1000 | 5.20 ppm |
2019-02-19 | 5867-016-0830 | 7.30 ppm |
2019-02-26 | 5867-016-1255 | 7.20 ppm |
2019-03-05 | 5867-016-0845 | 7.50 ppm |
2019-03-12 | 5867-016-0730 | 7.10 ppm |
2019-03-19 | 5867-016-0805 | 7.20 ppm |
2019-04-02 | 5867-016-0830 | 7.10 ppm |
2019-04-09 | 5867-016-0935 | 7.20 ppm |
2019-04-16 | 5867-016-0935 | 7.40 ppm |
2019-04-23 | 5867-016-0815 | 7.30 ppm |
2019-04-23 | 5867-017-1325 | 2.50 ppm |
2019-04-23 | 5867-021-1225 | 2.70 ppm |
2019-04-30 | 5867-016-0830 | 7.40 ppm |
2019-05-07 | 5867-016-0900 | 7.50 ppm |
2019-05-14 | 5867-016-0905 | 7.50 ppm |
2019-05-21 | 5867-014-0917 | 3.00 ppm |
2019-05-21 | 5867-016-0832 | 7.30 ppm |
2019-05-21 | 5867-021-0815 | 2.70 ppm |
2019-05-21 | 5867-022-0815 | 2.80 ppm |
2019-05-21 | 5867-023-1010 | 6.40 ppm |
2019-05-21 | 5867-024-1010 | 6.60 ppm |
2019-06-04 | 5867-014-0815 | 3.20 ppm |
2019-06-04 | 5867-016-0721 | 7.50 ppm |
2019-06-04 | 5867-021-0915 | 2.80 ppm |
2019-06-04 | 5867-022-0915 | 2.70 ppm |
2019-06-04 | 5867-023-0950 | 6.40 ppm |
2019-06-04 | 5867-024-0950 | 6.60 ppm |
2019-06-25 | 5867-014-0930 | 3.80 ppm |
2019-06-25 | 5867-016-0830 | 7.30 ppm |
2019-06-25 | 5867-021-0815 | 2.70 ppm |
2019-06-25 | 5867-022-0815 | 2.70 ppm |
2019-06-25 | 5867-023-1124 | 6.30 ppm |
2019-06-25 | 5867-023-1410 | 6.30 ppm |
2019-06-25 | 5867-024-1124 | 6.70 ppm |
2019-07-02 | 5867-014-0920 | 3.70 ppm |
2019-07-02 | 5867-016-0837 | 6.90 ppm |
2019-07-02 | 5867-021-0900 | 2.60 ppm |
2019-07-02 | 5867-022-0900 | 2.50 ppm |
2019-07-02 | 5867-023-1054 | 5.90 ppm |
2019-07-02 | 5867-024-1054 | 6.10 ppm |
2019-07-10 | 5867-014-1040 | 3.90 ppm |
2019-07-10 | 5867-016-0815 | 7.20 ppm |
2019-07-10 | 5867-021-0755 | 2.70 ppm |
2019-07-10 | 5867-022-0755 | 2.70 ppm |
2019-07-10 | 5867-023-1125 | 6.20 ppm |
2019-07-10 | 5867-024-1125 | 7.00 ppm |
2019-07-17 | 5867-014-0800 | 4.20 ppm |
2019-07-17 | 5867-016-0800 | 7.80 ppm |
2019-07-17 | 5867-021-0800 | 2.80 ppm |
2019-07-17 | 5867-022-0800 | 2.80 ppm |
2019-07-17 | 5867-023-0800 | 6.70 ppm |
2019-07-17 | 5867-024-0800 | 6.90 ppm |
2019-07-24 | 5867-007-1135 | 4.00 ppm |
2019-07-24 | 5867-014-1200 | 3.70 ppm |
2019-07-24 | 5867-016-1020 | 7.20 ppm |
2019-07-24 | 5867-021-1015 | 2.70 ppm |
2019-07-24 | 5867-021-1030 | 2.70 ppm |
2019-07-24 | 5867-022-1050 | 2.60 ppm |
2019-07-24 | 5867-023-1100 | 7.30 ppm |
2019-07-24 | 5867-024-1120 | 7.40 ppm |
2019-07-31 | 5867-014-1200 | 3.80 ppm |
2019-07-31 | 5867-016-1200 | 7.20 ppm |
2019-07-31 | 5867-021-1200 | 2.70 ppm |
2019-07-31 | 5867-022-1200 | 2.70 ppm |
2019-07-31 | 5867-023-1200 | 6.30 ppm |
2019-07-31 | 5867-024-1200 | 6.50 ppm |
2019-08-21 | 5867-008-0920 | 5.90 ppm |
2019-08-21 | 5867-014-0850 | 4.00 ppm |
2019-08-21 | 5867-016-1330 | 8.20 ppm |
2019-08-21 | 5867-021-0955 | 3.00 ppm |
2019-08-21 | 5867-022-0955 | 3.00 ppm |
2019-08-21 | 5867-023-1050 | 7.10 ppm |
2019-08-21 | 5867-024-1050 | 7.40 ppm |
2019-09-10 | 5867-007-0935 | 4.10 ppm |
2019-09-10 | 5867-008-1015 | 5.40 ppm |
2019-09-10 | 5867-014-0935 | 3.40 ppm |
2019-09-10 | 5867-016-0920 | 7.50 ppm |
2019-09-10 | 5867-017-0942 | 2.70 ppm |
2019-09-10 | 5867-021-0820 | 2.90 ppm |
2019-09-10 | 5867-022-0850 | 2.80 ppm |
2019-09-10 | 5867-023-1115 | 6.40 ppm |
2019-09-10 | 5867-024-1115 | 6.80 ppm |
2019-10-02 | 5867-007-0800 | 4.50 ppm |
2019-10-02 | 5867-008-0815 | 5.90 ppm |
2019-10-02 | 5867-014-0800 | 3.90 ppm |
2019-10-02 | 5867-016-1035 | 8.40 ppm |
2019-10-02 | 5867-017-0835 | 2.90 ppm |
2019-10-02 | 5867-021-0900 | 2.90 ppm |
2019-10-02 | 5867-022-0900 | 2.90 ppm |
2019-10-02 | 5867-023-0935 | 7.20 ppm |
2019-10-02 | 5867-024-0935 | 7.70 ppm |
2019-11-06 | 5867-007-0808 | 3.40 ppm |
2019-11-06 | 5867-008-1030 | 4.70 ppm |
2019-11-06 | 5867-014-0808 | 2.80 ppm |
2019-11-06 | 5867-016-1000 | 6.90 ppm |
2019-11-06 | 5867-017-0753 | 2.00 ppm |
2019-11-06 | 5867-023-0920 | 5.90 ppm |
2019-11-06 | 5867-024-0920 | 6.30 ppm |
2019-12-04 | 5867-007-0945 | 2.10 ppm |
2019-12-04 | 5867-008-1008 | 4.40 ppm |
2019-12-04 | 5867-014-0945 | 3.50 ppm |
2019-12-04 | 5867-016-1131 | 7.00 ppm |
2019-12-04 | 5867-017-0924 | 1.40 ppm |
2019-12-04 | 5867-023-0845 | 7.20 ppm |
2019-12-04 | 5867-024-0845 | 6.80 ppm |
* Sample result is taken from the system's CCR report.