Nitrate
City of Corcoran
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 |
---|---|---|---|---|
2014 | 3.34 ppm | 52 | 52 | 1.29 ppm - 5.42 ppm |
2015 | 3.71 ppm | 49 | 49 | 1.85 ppm - 9.04 ppm |
2016 | 3.27 ppm | 52 | 52 | 0.990 ppm - 7.70 ppm |
2017 | 4.23 ppm | 49 | 49 | 1.10 ppm - 7.20 ppm |
2018 | 4.00 ppm | 52 | 52 | 2.20 ppm - 7.50 ppm |
2019 | 5.12 ppm | 53 | 53 | 3.20 ppm - 7.00 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 |
---|---|---|
2014-01-06 | 5810-025-0820 | 4.97 ppm |
2014-01-13 | 5810-025-0845 | 4.52 ppm |
2014-01-22 | 5810-025-0900 | 4.52 ppm |
2014-01-29 | 5810-025-0820 | 4.29 ppm |
2014-02-03 | 5810-025-0920 | 5.42 ppm |
2014-02-10 | 5810-025-0840 | 5.20 ppm |
2014-02-19 | 5810-025-0855 | 3.61 ppm |
2014-02-24 | 5810-025-0825 | 3.61 ppm |
2014-03-03 | 5810-025-0815 | 5.42 ppm |
2014-03-10 | 5810-025-0745 | 5.42 ppm |
2014-03-17 | 5810-025-0830 | 3.39 ppm |
2014-03-28 | 5810-025-0800 | 3.84 ppm |
2014-03-31 | 5810-025-0805 | 4.29 ppm |
2014-04-07 | 5810-025-0805 | 3.16 ppm |
2014-04-14 | 5810-025-0830 | 2.48 ppm |
2014-04-21 | 5810-025-0745 | 2.71 ppm |
2014-04-28 | 5810-025-0845 | 4.74 ppm |
2014-05-05 | 5810-025-0750 | 2.48 ppm |
2014-05-12 | 5810-025-0810 | 2.15 ppm |
2014-05-19 | 5810-025-0805 | 2.12 ppm |
2014-05-28 | 5810-025-0745 | 1.83 ppm |
2014-06-02 | 5810-025-0750 | 1.67 ppm |
2014-06-09 | 5810-025-0805 | 2.71 ppm |
2014-06-16 | 5810-025-0745 | 1.29 ppm |
2014-06-23 | 5810-025-0745 | 3.61 ppm |
2014-06-30 | 5810-025-0750 | 2.21 ppm |
2014-07-07 | 5810-025-0810 | 2.21 ppm |
2014-07-14 | 5810-025-0714 | 1.87 ppm |
2014-07-21 | 5810-025-0800 | 1.97 ppm |
2014-07-28 | 5810-025-0745 | 1.97 ppm |
2014-08-04 | 5810-025-0825 | 2.26 ppm |
2014-08-11 | 5810-025-0755 | 2.17 ppm |
2014-08-18 | 5810-025-0835 | 2.26 ppm |
2014-08-25 | 5810-025-0759 | 2.17 ppm |
2014-09-03 | 5810-025-0715 | 3.16 ppm |
2014-09-08 | 5810-025-0745 | 2.24 ppm |
2014-09-15 | 5810-025-0805 | 1.92 ppm |
2014-09-22 | 5810-025-0715 | 3.16 ppm |
2014-09-29 | 5810-025-0810 | 3.39 ppm |
2014-10-06 | 5810-025-0815 | 3.39 ppm |
2014-10-13 | 5810-025-0755 | 3.39 ppm |
2014-10-20 | 5810-025-0735 | 3.84 ppm |
2014-10-27 | 5810-025-0810 | 3.84 ppm |
2014-11-03 | 5810-025-0835 | 4.07 ppm |
2014-11-10 | 5810-025-0830 | 4.07 ppm |
2014-11-17 | 5810-025-0730 | 3.84 ppm |
2014-11-24 | 5810-025-0810 | 3.16 ppm |
2014-12-01 | 5810-025-0805 | 3.39 ppm |
2014-12-08 | 5810-025-0800 | 3.84 ppm |
2014-12-15 | 5810-025-0820 | 5.42 ppm |
2014-12-22 | 5810-025-0755 | 4.52 ppm |
2014-12-29 | 5810-025-0815 | 4.52 ppm |
2015-01-05 | 5810-025-0750 | 4.29 ppm |
2015-01-12 | 5810-025-0805 | 4.74 ppm |
2015-01-21 | 5810-025-0740 | 5.87 ppm |
2015-01-26 | 5810-025-0800 | 4.29 ppm |
2015-02-02 | 5810-025-0800 | 4.07 ppm |
2015-02-09 | 5810-025-1055 | 1.85 ppm |
2015-02-18 | 5810-025-0755 | 3.16 ppm |
2015-02-23 | 5810-025-0745 | 3.84 ppm |
2015-03-02 | 5810-025-0915 | 6.33 ppm |
2015-03-09 | 5810-025-0740 | 6.55 ppm |
2015-03-16 | 5810-025-0835 | 9.04 ppm |
2015-03-23 | 5810-025-0845 | 4.07 ppm |
2015-03-30 | 5810-025-0745 | 4.52 ppm |
2015-04-06 | 5810-025-0840 | 4.52 ppm |
2015-04-13 | 5810-025-0940 | 3.16 ppm |
2015-04-20 | 5810-025-0810 | 2.48 ppm |
2015-04-27 | 5810-025-0750 | 2.71 ppm |
2015-05-04 | 5810-025-0825 | 2.71 ppm |
2015-05-11 | 5810-025-0740 | 4.29 ppm |
2015-05-18 | 5810-025-1103 | 3.61 ppm |
2015-05-27 | 5810-025-0830 | 3.84 ppm |
2015-06-01 | 5810-025-0805 | 4.07 ppm |
2015-06-08 | 5810-025-0730 | 4.07 ppm |
2015-06-15 | 5810-025-0805 | 3.84 ppm |
2015-06-22 | 5810-025-0745 | 3.84 ppm |
2015-06-29 | 5810-025-0840 | 2.94 ppm |
2015-07-06 | 5810-025-0735 | 3.39 ppm |
2015-07-13 | 5810-025-0805 | 3.39 ppm |
2015-07-27 | 5810-025-0730 | 3.70 ppm |
2015-08-03 | 5810-025-0730 | 3.16 ppm |
2015-08-17 | 5810-025-0740 | 4.07 ppm |
2015-08-24 | 5810-025-0920 | 2.08 ppm |
2015-08-31 | 5810-025-0810 | 2.48 ppm |
2015-09-09 | 5810-025-0745 | 2.40 ppm |
2015-09-14 | 5810-025-0800 | 3.00 ppm |
2015-09-21 | 5810-025-0750 | 2.90 ppm |
2015-09-28 | 5810-025-0815 | 3.10 ppm |
2015-10-05 | 5810-025-0745 | 5.60 ppm |
2015-10-12 | 5810-025-0735 | 3.40 ppm |
2015-10-19 | 5810-025-0745 | 3.60 ppm |
2015-10-26 | 5810-025-0815 | 3.00 ppm |
2015-11-02 | 5810-025-0750 | 3.10 ppm |
2015-11-09 | 5810-025-0730 | 3.50 ppm |
2015-11-16 | 5810-025-0755 | 2.40 ppm |
2015-11-23 | 5810-025-0820 | 2.80 ppm |
2015-11-30 | 5810-025-0810 | 2.90 ppm |
2015-12-14 | 5810-025-0725 | 3.10 ppm |
2015-12-21 | 5810-025-0815 | 3.10 ppm |
2015-12-28 | 5810-025-0745 | 3.10 ppm |
2016-01-04 | 5810-025-0740 | 3.30 ppm |
2016-01-11 | 5810-025-0815 | 3.30 ppm |
2016-01-20 | 5810-025-0740 | 3.10 ppm |
2016-01-25 | 5810-025-0750 | 3.20 ppm |
2016-02-01 | 5810-025-0820 | 2.20 ppm |
2016-02-08 | 5810-025-0745 | 3.30 ppm |
2016-02-17 | 5810-025-0925 | 2.50 ppm |
2016-02-22 | 5810-025-0820 | 3.10 ppm |
2016-02-29 | 5810-025-0810 | 3.30 ppm |
2016-03-10 | 5810-025-0800 | 2.50 ppm |
2016-03-14 | 5810-025-0830 | 3.20 ppm |
2016-03-21 | 5810-025-0745 | 3.00 ppm |
2016-03-28 | 5810-025-0735 | 1.60 ppm |
2016-04-04 | 5810-025-0845 | 3.30 ppm |
2016-04-11 | 5810-025-0835 | 2.60 ppm |
2016-04-18 | 5810-025-0730 | 3.50 ppm |
2016-04-25 | 5810-025-0745 | 0.990 ppm |
2016-05-02 | 5810-025-0740 | 2.00 ppm |
2016-05-09 | 5810-025-0820 | 2.60 ppm |
2016-05-16 | 5810-025-0750 | 2.00 ppm |
2016-05-27 | 5810-025-1050 | 2.90 ppm |
2016-06-01 | 5810-025-0800 | 3.70 ppm |
2016-06-08 | 5810-025-0815 | 2.60 ppm |
2016-06-13 | 5810-025-0740 | 2.50 ppm |
2016-06-20 | 5810-025-0730 | 2.70 ppm |
2016-06-27 | 5810-025-1130 | 2.90 ppm |
2016-07-05 | 5810-025-0735 | 2.30 ppm |
2016-07-13 | 5810-025-0745 | 2.70 ppm |
2016-07-18 | 5810-025-0750 | 2.00 ppm |
2016-07-25 | 5810-025-0940 | 2.60 ppm |
2016-08-01 | 5810-025-0740 | 2.30 ppm |
2016-08-08 | 5810-025-0745 | 2.70 ppm |
2016-08-15 | 5810-025-0750 | 2.80 ppm |
2016-08-22 | 5810-025-0840 | 3.00 ppm |
2016-08-29 | 5810-025-0855 | 3.00 ppm |
2016-09-07 | 5810-025-0840 | 3.60 ppm |
2016-09-12 | 5810-025-0740 | 3.30 ppm |
2016-09-19 | 5810-025-0915 | 4.20 ppm |
2016-09-26 | 5810-025-0825 | 1.90 ppm |
2016-10-03 | 5810-025-0920 | 4.80 ppm |
2016-10-10 | 5810-025-0830 | 4.60 ppm |
2016-10-17 | 5810-025-0815 | 4.30 ppm |
2016-10-24 | 5810-025-0755 | 4.40 ppm |
2016-10-31 | 5810-025-0800 | 3.80 ppm |
2016-11-10 | 5810-025-1130 | 5.20 ppm |
2016-11-14 | 5810-025-0930 | 3.40 ppm |
2016-11-21 | 5810-025-0845 | 3.40 ppm |
2016-11-28 | 5810-025-0810 | 3.80 ppm |
2016-12-07 | 5810-025-0825 | 4.40 ppm |
2016-12-12 | 5810-025-0815 | 4.60 ppm |
2016-12-21 | 5810-025-1000 | 7.70 ppm |
2016-12-28 | 5810-025-0900 | 7.10 ppm |
2017-01-04 | 5810-025-0728 | 2.70 ppm |
2017-01-11 | 5810-025-0835 | 3.80 ppm |
2017-01-18 | 5810-025-0827 | 2.90 ppm |
2017-01-23 | 5810-025-0955 | 1.10 ppm |
2017-02-01 | 5810-025-0855 | 3.00 ppm |
2017-02-08 | 5810-025-0900 | 3.60 ppm |
2017-02-13 | 5810-025-0722 | 4.30 ppm |
2017-02-22 | 5810-025-0757 | 4.80 ppm |
2017-03-01 | 5810-025-0810 | 4.80 ppm |
2017-03-06 | 5810-025-0745 | 4.40 ppm |
2017-03-13 | 5810-025-0835 | 4.10 ppm |
2017-03-20 | 5810-025-0840 | 4.70 ppm |
2017-03-27 | 5810-025-0755 | 2.00 ppm |
2017-04-03 | 5810-025-0800 | 4.70 ppm |
2017-04-10 | 5810-025-0800 | 4.00 ppm |
2017-04-17 | 5810-025-0755 | 4.50 ppm |
2017-04-24 | 5810-025-0820 | 2.70 ppm |
2017-05-11 | 5810-025-0915 | 4.40 ppm |
2017-05-15 | 5810-025-0740 | 4.30 ppm |
2017-05-22 | 5810-025-0740 | 3.70 ppm |
2017-05-31 | 5810-025-0725 | 4.40 ppm |
2017-06-05 | 5810-025-0750 | 4.50 ppm |
2017-06-12 | 5810-025-0750 | 4.40 ppm |
2017-06-19 | 5810-025-0740 | 4.50 ppm |
2017-06-26 | 5810-025-0745 | 3.90 ppm |
2017-07-03 | 5810-025-0745 | 3.80 ppm |
2017-07-12 | 5810-025-0800 | 3.60 ppm |
2017-07-24 | 5810-025-0730 | 4.00 ppm |
2017-08-02 | 5810-025-0730 | 7.20 ppm |
2017-08-07 | 5810-025-0755 | 4.40 ppm |
2017-08-23 | 5810-025-0744 | 3.80 ppm |
2017-08-28 | 5810-025-0750 | 3.70 ppm |
2017-09-06 | 5810-025-0742 | 4.00 ppm |
2017-09-11 | 5810-025-0750 | 4.80 ppm |
2017-09-18 | 5810-025-0745 | 4.00 ppm |
2017-09-25 | 5810-025-0725 | 5.00 ppm |
2017-10-02 | 5810-025-0815 | 4.60 ppm |
2017-10-09 | 5810-025-0723 | 5.20 ppm |
2017-10-16 | 5810-025-0728 | 4.80 ppm |
2017-10-23 | 5810-025-0754 | 4.70 ppm |
2017-10-30 | 5810-025-0752 | 4.70 ppm |
2017-11-06 | 5810-025-0735 | 4.20 ppm |
2017-11-13 | 5810-025-0852 | 5.40 ppm |
2017-11-20 | 5810-025-0752 | 4.20 ppm |
2017-11-27 | 5810-025-0751 | 5.00 ppm |
2017-12-04 | 5810-025-0835 | 5.20 ppm |
2017-12-11 | 5810-025-0825 | 5.00 ppm |
2017-12-18 | 5810-025-0825 | 4.90 ppm |
2017-12-27 | 5810-025-0911 | 4.70 ppm |
2018-01-03 | 5810-025-0744 | 5.30 ppm |
2018-01-08 | 5810-025-0751 | 5.50 ppm |
2018-01-17 | 5810-025-0828 | 5.30 ppm |
2018-01-22 | 5810-025-0800 | 5.80 ppm |
2018-01-29 | 5810-025-0745 | 4.60 ppm |
2018-02-05 | 5810-025-0800 | 4.80 ppm |
2018-02-12 | 5810-025-0745 | 5.00 ppm |
2018-02-21 | 5810-025-0741 | 5.40 ppm |
2018-02-26 | 5810-025-0750 | 5.30 ppm |
2018-03-05 | 5810-025-0830 | 6.40 ppm |
2018-03-12 | 5810-025-0743 | 4.90 ppm |
2018-03-19 | 5810-025-0810 | 2.20 ppm |
2018-03-26 | 5810-025-0745 | 2.30 ppm |
2018-04-04 | 5810-025-0744 | 3.20 ppm |
2018-04-09 | 5810-025-0758 | 3.50 ppm |
2018-04-16 | 5810-025-0757 | 3.10 ppm |
2018-04-23 | 5810-025-0838 | 2.70 ppm |
2018-04-30 | 5810-025-0741 | 3.10 ppm |
2018-05-07 | 5810-025-0750 | 4.20 ppm |
2018-05-14 | 5810-025-0747 | 4.20 ppm |
2018-05-21 | 5810-025-0735 | 3.90 ppm |
2018-05-30 | 5810-025-0910 | 4.90 ppm |
2018-06-04 | 5810-025-0750 | 3.40 ppm |
2018-06-11 | 5810-025-0743 | 3.30 ppm |
2018-06-18 | 5810-025-0720 | 3.00 ppm |
2018-06-25 | 5810-025-0822 | 3.70 ppm |
2018-07-02 | 5810-025-0745 | 3.80 ppm |
2018-07-09 | 5810-025-0800 | 3.20 ppm |
2018-07-16 | 5810-025-0755 | 2.90 ppm |
2018-07-23 | 5810-025-0745 | 2.60 ppm |
2018-07-30 | 5810-025-0740 | 3.20 ppm |
2018-08-06 | 5810-025-0720 | 3.00 ppm |
2018-08-15 | 5810-025-0747 | 2.70 ppm |
2018-08-20 | 5810-025-0729 | 3.20 ppm |
2018-08-27 | 5810-025-0802 | 3.80 ppm |
2018-09-05 | 5810-025-0735 | 3.60 ppm |
2018-09-10 | 5810-025-0755 | 3.30 ppm |
2018-09-17 | 5810-025-0750 | 3.80 ppm |
2018-09-24 | 5810-025-0742 | 3.80 ppm |
2018-10-01 | 5810-025-0735 | 3.90 ppm |
2018-10-08 | 5810-025-0735 | 7.50 ppm |
2018-10-15 | 5810-025-0752 | 2.60 ppm |
2018-10-22 | 5810-025-0805 | 3.20 ppm |
2018-10-29 | 5810-025-0735 | 3.30 ppm |
2018-11-05 | 5810-025-0750 | 3.50 ppm |
2018-11-14 | 5810-025-0740 | 3.60 ppm |
2018-11-19 | 5810-025-0740 | 3.80 ppm |
2018-11-26 | 5810-025-0735 | 3.50 ppm |
2018-12-03 | 5810-025-0720 | 4.70 ppm |
2018-12-10 | 5810-025-0800 | 5.70 ppm |
2018-12-17 | 5810-025-0741 | 4.80 ppm |
2018-12-26 | 5810-025-0733 | 6.10 ppm |
2019-01-02 | 5810-025-0758 | 6.00 ppm |
2019-01-07 | 5810-025-0738 | 5.80 ppm |
2019-01-14 | 5810-025-0727 | 4.60 ppm |
2019-01-22 | 5810-025-0740 | 6.10 ppm |
2019-01-28 | 5810-025-0750 | 6.30 ppm |
2019-02-06 | 5810-025-0745 | 5.60 ppm |
2019-02-11 | 5810-025-0755 | 5.70 ppm |
2019-02-20 | 5810-025-0755 | 6.40 ppm |
2019-02-25 | 5810-025-0750 | 7.00 ppm |
2019-03-04 | 5810-025-0735 | 5.60 ppm |
2019-03-11 | 5810-025-0745 | 5.50 ppm |
2019-03-18 | 5810-025-0758 | 5.60 ppm |
2019-03-25 | 5810-025-0743 | 6.70 ppm |
2019-04-01 | 5810-025-0815 | 6.00 ppm |
2019-04-08 | 5810-025-0758 | 6.00 ppm |
2019-04-15 | 5810-025-0825 | 4.80 ppm |
2019-04-22 | 5810-025-0755 | 6.20 ppm |
2019-05-01 | 5810-025-0830 | 4.60 ppm |
2019-05-08 | 5810-025-0830 | 5.90 ppm |
2019-05-13 | 5810-025-0815 | 5.40 ppm |
2019-05-20 | 5810-025-0750 | 5.00 ppm |
2019-05-29 | 5810-025-0815 | 5.60 ppm |
2019-06-03 | 5810-025-0750 | 5.60 ppm |
2019-06-10 | 5810-025-0745 | 5.10 ppm |
2019-06-17 | 5810-025-0750 | 5.00 ppm |
2019-06-24 | 5810-025-0758 | 4.60 ppm |
2019-07-01 | 5810-025-0755 | 4.40 ppm |
2019-07-10 | 5810-025-0745 | 4.00 ppm |
2019-07-15 | 5810-025-0745 | 4.70 ppm |
2019-07-22 | 5810-025-0751 | 4.40 ppm |
2019-08-01 | 5810-025-0808 | 4.20 ppm |
2019-08-05 | 5810-025-0813 | 4.10 ppm |
2019-08-14 | 5810-025-0743 | 3.80 ppm |
2019-08-21 | 5810-025-0720 | 3.60 ppm |
2019-08-26 | 5810-025-0749 | 4.10 ppm |
2019-09-04 | 5810-025-0811 | 4.00 ppm |
2019-09-09 | 5810-025-0801 | 4.60 ppm |
2019-09-16 | 5810-025-0745 | 4.40 ppm |
2019-09-23 | 5810-025-0745 | 3.20 ppm |
2019-10-03 | 5810-025-0752 | 3.20 ppm |
2019-10-09 | 5810-025-0750 | 3.30 ppm |
2019-10-14 | 5810-025-0805 | 3.50 ppm |
2019-10-21 | 5810-025-0815 | 4.60 ppm |
2019-10-28 | 5810-025-0735 | 5.20 ppm |
2019-11-04 | 5810-025-0830 | 4.90 ppm |
2019-11-13 | 5810-025-0750 | 4.70 ppm |
2019-11-18 | 5810-025-0745 | 5.40 ppm |
2019-11-25 | 5810-025-0750 | 5.80 ppm |
2019-12-02 | 5810-025-0740 | 5.90 ppm |
2019-12-11 | 5810-025-0820 | 6.30 ppm |
2019-12-16 | 5810-025-0810 | 6.00 ppm |
2019-12-23 | 5810-025-0800 | 6.10 ppm |
2019-12-30 | 5810-025-0830 | 6.10 ppm |