Nitrate
City of Atwater
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 | 8.29 ppm | 82 | 82 | 7.68 ppm - 10.2 ppm |
2015 | 7.60 ppm | 115 | 115 | 1.20 ppm - 8.70 ppm |
2016 | 4.90 ppm | 1 | 1 | 1.30 ppm - 12.0 ppm |
2017 | 4.90 ppm | 1 | 1 | 1.80 ppm - 7.70 ppm |
2018 | 6.41 ppm | 11 | 11 | 2.10 ppm - 17.0 ppm |
2019 | 7.26 ppm | 68 | 68 | 1.80 ppm - 9.20 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 |
---|---|---|
2014-01-02 | 5806-015-0700 | 8.36 ppm |
2014-01-02 | 5806-026-1000 | 8.13 ppm |
2014-01-28 | 5806-015-0800 | 8.13 ppm |
2014-01-28 | 5806-026-0800 | 7.91 ppm |
2014-02-25 | 5806-015-0830 | 8.36 ppm |
2014-02-25 | 5806-026-0830 | 8.36 ppm |
2014-03-05 | 5806-015-0900 | 8.13 ppm |
2014-03-05 | 5806-026-0900 | 8.13 ppm |
2014-03-11 | 5806-015-0930 | 8.13 ppm |
2014-03-11 | 5806-026-0930 | 7.91 ppm |
2014-03-18 | 5806-015-1045 | 8.58 ppm |
2014-03-18 | 5806-026-1045 | 8.58 ppm |
2014-03-25 | 5806-015-0900 | 8.13 ppm |
2014-03-25 | 5806-026-0900 | 8.36 ppm |
2014-04-01 | 5806-015-0900 | 9.04 ppm |
2014-04-01 | 5806-026-0900 | 9.04 ppm |
2014-04-08 | 5806-015-0900 | 8.13 ppm |
2014-04-08 | 5806-026-0900 | 7.91 ppm |
2014-04-15 | 5806-015-0945 | 8.58 ppm |
2014-04-15 | 5806-026-0945 | 8.36 ppm |
2014-04-22 | 5806-015-0930 | 8.13 ppm |
2014-04-22 | 5806-026-0930 | 8.13 ppm |
2014-04-29 | 5806-015-0900 | 8.36 ppm |
2014-04-29 | 5806-026-0900 | 8.13 ppm |
2014-05-06 | 5806-015-0945 | 9.04 ppm |
2014-05-06 | 5806-026-0945 | 8.58 ppm |
2014-05-13 | 5806-015-0900 | 8.36 ppm |
2014-05-13 | 5806-026-0900 | 8.36 ppm |
2014-05-20 | 5806-015-0900 | 8.58 ppm |
2014-05-20 | 5806-026-0900 | 8.58 ppm |
2014-05-27 | 5806-015-0900 | 8.36 ppm |
2014-05-27 | 5806-026-0900 | 8.36 ppm |
2014-06-03 | 5806-015-0900 | 8.36 ppm |
2014-06-03 | 5806-026-0900 | 8.36 ppm |
2014-06-10 | 5806-015-0900 | 8.36 ppm |
2014-06-10 | 5806-026-0900 | 8.36 ppm |
2014-06-17 | 5806-015-0700 | 8.36 ppm |
2014-06-17 | 5806-026-0700 | 8.36 ppm |
2014-06-24 | 5806-015-0915 | 8.36 ppm |
2014-06-24 | 5806-026-0930 | 8.36 ppm |
2014-07-01 | 5806-015-0900 | 8.13 ppm |
2014-07-01 | 5806-026-0900 | 8.13 ppm |
2014-07-08 | 5806-015-0900 | 8.13 ppm |
2014-07-08 | 5806-026-0900 | 7.91 ppm |
2014-07-15 | 5806-015-0900 | 8.13 ppm |
2014-07-15 | 5806-026-0900 | 8.13 ppm |
2014-07-22 | 5806-015-0900 | 8.36 ppm |
2014-07-22 | 5806-026-0900 | 8.36 ppm |
2014-07-29 | 5806-015-0900 | 8.36 ppm |
2014-07-29 | 5806-026-0900 | 8.36 ppm |
2014-08-12 | 5806-015-0900 | 8.13 ppm |
2014-08-12 | 5806-026-0900 | 8.13 ppm |
2014-08-19 | 5806-015-0900 | 8.36 ppm |
2014-08-19 | 5806-026-0900 | 8.36 ppm |
2014-08-26 | 5806-015-0900 | 8.13 ppm |
2014-08-26 | 5806-026-0900 | 8.13 ppm |
2014-09-02 | 5806-015-0900 | 8.36 ppm |
2014-09-02 | 5806-026-0900 | 8.36 ppm |
2014-09-09 | 5806-015-0900 | 10.2 ppm |
2014-09-09 | 5806-026-0900 | 8.58 ppm |
2014-09-16 | 5806-015-0900 | 8.13 ppm |
2014-09-16 | 5806-026-0900 | 8.13 ppm |
2014-09-23 | 5806-015-0900 | 8.36 ppm |
2014-09-23 | 5806-026-0900 | 8.36 ppm |
2014-09-30 | 5806-015-0900 | 8.13 ppm |
2014-09-30 | 5806-026-0900 | 8.13 ppm |
2014-10-07 | 5806-015-0700 | 8.13 ppm |
2014-10-07 | 5806-026-0700 | 8.13 ppm |
2014-10-14 | 5806-015-0830 | 8.58 ppm |
2014-10-14 | 5806-026-0830 | 8.36 ppm |
2014-10-28 | 5806-015-0930 | 8.13 ppm |
2014-10-28 | 5806-026-0930 | 8.36 ppm |
2014-11-04 | 5806-015-0900 | 8.36 ppm |
2014-11-04 | 5806-026-0900 | 8.36 ppm |
2014-12-09 | 5806-015-0900 | 8.13 ppm |
2014-12-09 | 5806-026-0900 | 8.36 ppm |
2014-12-16 | 5806-015-0900 | 7.91 ppm |
2014-12-16 | 5806-026-0900 | 7.91 ppm |
2014-12-23 | 5806-015-0900 | 7.68 ppm |
2014-12-23 | 5806-026-0900 | 7.68 ppm |
2014-12-30 | 5806-015-0900 | 7.91 ppm |
2014-12-30 | 5806-026-0900 | 7.91 ppm |
2015-01-06 | 5806-015-0900 | 7.45 ppm |
2015-01-06 | 5806-026-0900 | 7.68 ppm |
2015-01-13 | 5806-015-0930 | 8.13 ppm |
2015-01-13 | 5806-026-0930 | 8.13 ppm |
2015-01-20 | 5806-015-0930 | 8.13 ppm |
2015-01-20 | 5806-026-0930 | 8.13 ppm |
2015-01-27 | 5806-015-0900 | 8.13 ppm |
2015-01-27 | 5806-026-0900 | 8.13 ppm |
2015-02-03 | 5806-015-0930 | 7.91 ppm |
2015-02-03 | 5806-026-0930 | 7.91 ppm |
2015-02-10 | 5806-015-0930 | 8.13 ppm |
2015-02-10 | 5806-026-0930 | 7.91 ppm |
2015-02-17 | 5806-015-0930 | 8.36 ppm |
2015-02-17 | 5806-026-0930 | 8.36 ppm |
2015-02-24 | 5806-015-0900 | 8.13 ppm |
2015-02-24 | 5806-026-0900 | 8.13 ppm |
2015-03-03 | 5806-015-0900 | 8.13 ppm |
2015-03-03 | 5806-026-0910 | 8.13 ppm |
2015-03-11 | 5806-013-0915 | 6.55 ppm |
2015-03-11 | 5806-014-0845 | 7.23 ppm |
2015-03-11 | 5806-015-0815 | 8.13 ppm |
2015-03-11 | 5806-016-0745 | 2.71 ppm |
2015-03-11 | 5806-017-0945 | 3.84 ppm |
2015-03-11 | 5806-018-1015 | 7.23 ppm |
2015-03-11 | 5806-019-0715 | 1.33 ppm |
2015-03-11 | 5806-021-0645 | 1.90 ppm |
2015-03-11 | 5806-026-0815 | 7.91 ppm |
2015-03-17 | 5806-015-0930 | 7.91 ppm |
2015-03-17 | 5806-026-0930 | 7.91 ppm |
2015-03-24 | 5806-015-0930 | 7.91 ppm |
2015-03-24 | 5806-026-0930 | 7.91 ppm |
2015-03-31 | 5806-015-0930 | 8.13 ppm |
2015-03-31 | 5806-026-0930 | 8.13 ppm |
2015-04-07 | 5806-015-1000 | 7.91 ppm |
2015-04-07 | 5806-026-1000 | 7.91 ppm |
2015-04-14 | 5806-015-0930 | 8.13 ppm |
2015-04-14 | 5806-026-0930 | 8.13 ppm |
2015-04-21 | 5806-015-0900 | 8.13 ppm |
2015-04-21 | 5806-026-0900 | 8.13 ppm |
2015-04-28 | 5806-015-0900 | 7.91 ppm |
2015-04-28 | 5806-026-0900 | 7.91 ppm |
2015-05-05 | 5806-015-0900 | 8.13 ppm |
2015-05-05 | 5806-026-0900 | 8.13 ppm |
2015-05-12 | 5806-015-0900 | 8.13 ppm |
2015-05-12 | 5806-026-0900 | 7.91 ppm |
2015-05-19 | 5806-015-0900 | 8.13 ppm |
2015-05-19 | 5806-026-0900 | 4.29 ppm |
2015-05-26 | 5806-015-0900 | 7.91 ppm |
2015-05-26 | 5806-026-0900 | 7.00 ppm |
2015-06-02 | 5806-015-0900 | 7.91 ppm |
2015-06-02 | 5806-026-0900 | 7.68 ppm |
2015-06-09 | 5806-015-0930 | 8.13 ppm |
2015-06-09 | 5806-026-0930 | 8.13 ppm |
2015-06-16 | 5806-015-0900 | 8.13 ppm |
2015-06-16 | 5806-026-0900 | 8.13 ppm |
2015-06-23 | 5806-015-0900 | 8.13 ppm |
2015-06-23 | 5806-026-0900 | 7.91 ppm |
2015-06-30 | 5806-015-0900 | 7.91 ppm |
2015-06-30 | 5806-026-0900 | 7.91 ppm |
2015-07-07 | 5806-015-0900 | 8.13 ppm |
2015-07-07 | 5806-026-0900 | 8.13 ppm |
2015-07-14 | 5806-015-0900 | 7.91 ppm |
2015-07-14 | 5806-026-0900 | 7.91 ppm |
2015-07-21 | 5806-015-0900 | 8.20 ppm |
2015-07-21 | 5806-026-0900 | 8.40 ppm |
2015-07-28 | 5806-015-0900 | 8.00 ppm |
2015-07-28 | 5806-026-0900 | 8.00 ppm |
2015-08-04 | 5806-015-0900 | 8.30 ppm |
2015-08-04 | 5806-026-0900 | 8.30 ppm |
2015-08-11 | 5806-015-0900 | 8.10 ppm |
2015-08-11 | 5806-026-0900 | 8.20 ppm |
2015-08-18 | 5806-015-0900 | 8.10 ppm |
2015-08-18 | 5806-026-0900 | 7.80 ppm |
2015-08-25 | 5806-015-0900 | 7.80 ppm |
2015-08-25 | 5806-026-0900 | 7.80 ppm |
2015-09-01 | 5806-015-0900 | 7.90 ppm |
2015-09-01 | 5806-026-0900 | 8.10 ppm |
2015-09-08 | 5806-015-0900 | 7.90 ppm |
2015-09-08 | 5806-026-0900 | 7.80 ppm |
2015-09-15 | 5806-015-0900 | 8.20 ppm |
2015-09-15 | 5806-026-0900 | 8.10 ppm |
2015-09-22 | 5806-015-0830 | 8.13 ppm |
2015-09-22 | 5806-026-0830 | 7.91 ppm |
2015-09-29 | 5806-015-0900 | 8.20 ppm |
2015-09-29 | 5806-026-0900 | 8.20 ppm |
2015-10-06 | 5806-015-0900 | 8.30 ppm |
2015-10-06 | 5806-026-0900 | 8.20 ppm |
2015-10-13 | 5806-015-0900 | 7.60 ppm |
2015-10-13 | 5806-026-0900 | 7.70 ppm |
2015-10-20 | 5806-015-0900 | 8.10 ppm |
2015-10-20 | 5806-026-0900 | 8.10 ppm |
2015-11-10 | 5806-015-0900 | 8.20 ppm |
2015-11-10 | 5806-026-0900 | 8.10 ppm |
2015-11-17 | 5806-015-0900 | 8.10 ppm |
2015-11-17 | 5806-026-0900 | 8.30 ppm |
2015-11-24 | 5806-015-0900 | 7.90 ppm |
2015-11-24 | 5806-026-0900 | 8.40 ppm |
2015-12-01 | 5806-015-0930 | 8.10 ppm |
2015-12-01 | 5806-026-0930 | 8.40 ppm |
2015-12-07 | 5806-013-0630 | 6.90 ppm |
2015-12-07 | 5806-014-0930 | 8.70 ppm |
2015-12-07 | 5806-015-1000 | 8.30 ppm |
2015-12-07 | 5806-016-0745 | 4.20 ppm |
2015-12-07 | 5806-017-0900 | 4.00 ppm |
2015-12-07 | 5806-018-0830 | 7.80 ppm |
2015-12-07 | 5806-019-1030 | 1.20 ppm |
2015-12-07 | 5806-021-0715 | 1.90 ppm |
2015-12-08 | 5806-015-0930 | 8.20 ppm |
2015-12-08 | 5806-026-0930 | 8.30 ppm |
2015-12-15 | 5806-015-0930 | 8.40 ppm |
2015-12-15 | 5806-026-0930 | 8.30 ppm |
2015-12-22 | 5806-015-0900 | 7.80 ppm |
2015-12-22 | 5806-026-0900 | 7.90 ppm |
2015-12-29 | 5806-015-0900 | 7.90 ppm |
2015-12-29 | 5806-026-0900 | 7.90 ppm |
2016-06-01 | 4.90 ppm* | |
2017-06-01 | 4.90 ppm* | |
2018-03-20 | 5806-015-0900 | 17.0 ppm |
2018-04-24 | 5806-015-1200 | 7.80 ppm |
2018-05-16 | 5806-013-0830 | 6.20 ppm |
2018-05-16 | 5806-016-0900 | 3.60 ppm |
2018-05-16 | 5806-017-0930 | 3.90 ppm |
2018-05-16 | 5806-018-0730 | 4.20 ppm |
2018-05-16 | 5806-019-0800 | 4.00 ppm |
2018-05-16 | 5806-021-1000 | 2.10 ppm |
2018-08-30 | 5806-015-0630 | 7.70 ppm |
2018-11-29 | 5806-014-1130 | 6.60 ppm |
2018-11-29 | 5806-015-0650 | 7.40 ppm |
2019-02-27 | 5806-015-0650 | 7.50 ppm |
2019-05-30 | 5806-013-0901 | 6.20 ppm |
2019-05-30 | 5806-014-0930 | 5.60 ppm |
2019-05-30 | 5806-016-0720 | 1.80 ppm |
2019-05-30 | 5806-017-0655 | 3.70 ppm |
2019-05-30 | 5806-018-0815 | 4.60 ppm |
2019-05-30 | 5806-019-0710 | 3.90 ppm |
2019-05-30 | 5806-021-0745 | 1.80 ppm |
2019-06-05 | 5806-015-1415 | 9.20 ppm |
2019-06-05 | 5806-026-1420 | 3.50 ppm |
2019-06-13 | 5806-015-1100 | 7.80 ppm |
2019-06-13 | 5806-026-1105 | 7.00 ppm |
2019-06-18 | 5806-015-1045 | 7.40 ppm |
2019-06-18 | 5806-026-1047 | 7.70 ppm |
2019-06-27 | 5806-015-0725 | 7.60 ppm |
2019-06-27 | 5806-026-0726 | 7.60 ppm |
2019-07-02 | 5806-015-0700 | 7.70 ppm |
2019-07-02 | 5806-026-0705 | 7.50 ppm |
2019-07-09 | 5806-015-0939 | 7.70 ppm |
2019-07-09 | 5806-026-0940 | 7.70 ppm |
2019-07-16 | 5806-015-0920 | 7.70 ppm |
2019-07-16 | 5806-026-0921 | 7.70 ppm |
2019-07-23 | 5806-015-1048 | 7.60 ppm |
2019-07-23 | 5806-026-1050 | 7.60 ppm |
2019-07-30 | 5806-015-0942 | 7.70 ppm |
2019-07-30 | 5806-026-0943 | 7.50 ppm |
2019-08-06 | 5806-015-1310 | 7.70 ppm |
2019-08-06 | 5806-026-1311 | 7.80 ppm |
2019-08-13 | 5806-015-1035 | 7.60 ppm |
2019-08-13 | 5806-026-1040 | 7.70 ppm |
2019-08-20 | 5806-015-0700 | 7.70 ppm |
2019-08-20 | 5806-026-0705 | 7.80 ppm |
2019-08-27 | 5806-015-1400 | 7.70 ppm |
2019-08-27 | 5806-026-1405 | 7.80 ppm |
2019-09-03 | 5806-015-1300 | 7.90 ppm |
2019-09-03 | 5806-026-1305 | 7.90 ppm |
2019-09-10 | 5806-015-1300 | 7.60 ppm |
2019-09-10 | 5806-026-1305 | 7.70 ppm |
2019-09-17 | 5806-015-1300 | 8.00 ppm |
2019-09-17 | 5806-026-1305 | 8.10 ppm |
2019-09-24 | 5806-015-1900 | 7.60 ppm |
2019-09-24 | 5806-026-1905 | 7.70 ppm |
2019-10-01 | 5806-015-0850 | 7.50 ppm |
2019-10-01 | 5806-026-0855 | 7.50 ppm |
2019-10-08 | 5806-015-0730 | 7.90 ppm |
2019-10-08 | 5806-026-0735 | 7.90 ppm |
2019-10-18 | 5806-015-1110 | 7.70 ppm |
2019-10-18 | 5806-026-1115 | 7.70 ppm |
2019-10-22 | 5806-015-1330 | 7.60 ppm |
2019-10-22 | 5806-026-1335 | 7.60 ppm |
2019-10-29 | 5806-015-0830 | 7.80 ppm |
2019-10-29 | 5806-026-0835 | 8.00 ppm |
2019-11-05 | 5806-015-0830 | 7.60 ppm |
2019-11-05 | 5806-026-0835 | 7.70 ppm |
2019-11-12 | 5806-015-0830 | 7.80 ppm |
2019-11-12 | 5806-026-0835 | 7.50 ppm |
2019-11-20 | 5806-015-0830 | 7.70 ppm |
2019-11-20 | 5806-026-0835 | 7.80 ppm |
2019-11-26 | 5806-015-0830 | 8.10 ppm |
2019-11-26 | 5806-026-0835 | 8.00 ppm |
2019-12-10 | 5806-015-0830 | 7.70 ppm |
2019-12-10 | 5806-026-0835 | 7.70 ppm |
2019-12-17 | 5806-015-0830 | 7.60 ppm |
2019-12-17 | 5806-026-0835 | 7.60 ppm |
2019-12-23 | 5806-015-0900 | 7.50 ppm |
2019-12-23 | 5806-026-0905 | 7.50 ppm |
2019-12-30 | 5806-015-0900 | 7.60 ppm |
2019-12-30 | 5806-026-0905 | 7.70 ppm |
* Sample result is taken from the system's CCR report.