Nitrate
City of Tustin
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 | 3.91 ppm | 20 | 20 | 2.37 ppm - 6.28 ppm |
2015 | 4.40 ppm | 11 | 11 | 2.30 ppm - 7.09 ppm |
2016 | 4.65 ppm | 55 | 54 | ND - 7.49 ppm |
2017 | 4.90 ppm | 116 | 115 | ND - 7.36 ppm |
2018 | 4.38 ppm | 33 | 33 | 1.000 ppm - 7.50 ppm |
2019 | 4.43 ppm | 61 | 61 | 0.920 ppm - 7.26 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 |
---|---|---|
2014-02-25 | 4417-003-0925 | 4.07 ppm |
2014-02-25 | 4417-011-1000 | 5.29 ppm |
2014-02-25 | 4417-012-1025 | 2.98 ppm |
2014-02-25 | 4417-016-0945 | 2.44 ppm |
2014-02-25 | 4417-032-0900 | 4.00 ppm |
2014-05-28 | 4417-003-1005 | 3.59 ppm |
2014-05-28 | 4417-011-1040 | 5.16 ppm |
2014-05-28 | 4417-013-0830 | 6.28 ppm |
2014-05-28 | 4417-016-1025 | 2.42 ppm |
2014-05-28 | 4417-032-0945 | 3.93 ppm |
2014-08-13 | 4417-003-1015 | 3.39 ppm |
2014-08-13 | 4417-011-1045 | 5.11 ppm |
2014-08-13 | 4417-013-0850 | 4.36 ppm |
2014-08-13 | 4417-016-1030 | 2.48 ppm |
2014-08-13 | 4417-032-0955 | 3.77 ppm |
2014-11-13 | 4417-003-1045 | 3.50 ppm |
2014-11-13 | 4417-011-1130 | 5.35 ppm |
2014-11-13 | 4417-013-0945 | 3.89 ppm |
2014-11-13 | 4417-016-1115 | 2.37 ppm |
2014-11-13 | 4417-032-1100 | 3.77 ppm |
2015-03-11 | 4417-011-1030 | 5.13 ppm |
2015-03-11 | 4417-012-1045 | 2.70 ppm |
2015-03-11 | 4417-013-0905 | 3.52 ppm |
2015-03-11 | 4417-016-1015 | 2.30 ppm |
2015-05-13 | 4417-011-1040 | 5.30 ppm |
2015-05-13 | 4417-013-0840 | 3.54 ppm |
2015-05-13 | 4417-032-0955 | 3.39 ppm |
2015-07-27 | 4417-011-1110 | 5.99 ppm |
2015-07-27 | 4417-013-0850 | 4.36 ppm |
2015-11-10 | 4417-011-0930 | 5.11 ppm |
2015-12-07 | 4417-013-1100 | 7.09 ppm |
2016-02-24 | 4417-003-1110 | 5.59 ppm |
2016-02-24 | 4417-011-0950 | 5.11 ppm |
2016-02-24 | 4417-016-0930 | 2.47 ppm |
2016-03-21 | 4417-003-0855 | 4.58 ppm |
2016-03-21 | 4417-003-0910 | 4.75 ppm |
2016-03-21 | 4417-013-0825 | 6.95 ppm |
2016-06-02 | 4417-003-1035 | 4.31 ppm |
2016-06-02 | 4417-003-1050 | 4.23 ppm |
2016-06-02 | 4417-011-1110 | 5.63 ppm |
2016-06-02 | 4417-013-0955 | 3.52 ppm |
2016-06-02 | 4417-032-1015 | 3.73 ppm |
2016-06-28 | 4417-011-0845 | 5.06 ppm |
2016-07-06 | 4792-021-0815 | 4.29 ppm |
2016-07-20 | 4792-018-0830 | 5.66 ppm |
2016-07-20 | 4792-021-1025 | 4.27 ppm |
2016-07-27 | 4792-018-1025 | 5.69 ppm |
2016-07-27 | 4792-021-0900 | 4.04 ppm |
2016-08-03 | 4792-018-0715 | 5.34 ppm |
2016-08-03 | 4792-021-0730 | 4.17 ppm |
2016-08-10 | 4792-018-1045 | 5.92 ppm |
2016-08-10 | 4792-021-0745 | 4.50 ppm |
2016-08-17 | 4417-011-1310 | 4.89 ppm |
2016-08-17 | 4417-013-1235 | 3.63 ppm |
2016-08-17 | 4792-018-1045 | 6.79 ppm |
2016-08-24 | 4792-018-0830 | 6.12 ppm |
2016-08-24 | 4792-018-0845 | ND |
2016-08-24 | 4792-021-0715 | 4.85 ppm |
2016-08-24 | 4792-021-0745 | 6.09 ppm |
2016-09-07 | 4792-018-1310 | 6.22 ppm |
2016-09-07 | 4792-021-1120 | 5.56 ppm |
2016-09-14 | 4792-018-0815 | 6.36 ppm |
2016-09-14 | 4792-021-0730 | 5.28 ppm |
2016-09-21 | 4792-018-0930 | 6.43 ppm |
2016-09-21 | 4792-021-0730 | 5.13 ppm |
2016-09-28 | 4792-018-0800 | 6.42 ppm |
2016-09-28 | 4792-021-0700 | 3.70 ppm |
2016-10-05 | 4792-018-0800 | 6.39 ppm |
2016-10-05 | 4792-021-0830 | 2.70 ppm |
2016-10-12 | 4792-018-0600 | 7.49 ppm |
2016-10-12 | 4792-021-0630 | 5.80 ppm |
2016-10-19 | 4792-018-0900 | 6.25 ppm |
2016-10-19 | 4792-021-0800 | 3.65 ppm |
2016-10-26 | 4792-018-0900 | 6.49 ppm |
2016-10-26 | 4792-021-0800 | 2.81 ppm |
2016-11-02 | 4792-018-1115 | 5.69 ppm |
2016-11-02 | 4792-021-1100 | 2.25 ppm |
2016-11-07 | 4417-011-1020 | 4.54 ppm |
2016-11-07 | 4417-013-0905 | 3.57 ppm |
2016-11-09 | 4792-021-0905 | 2.54 ppm |
2016-11-16 | 4792-021-0730 | 1.98 ppm |
2016-11-23 | 4792-018-1130 | 5.50 ppm |
2016-11-23 | 4792-021-1105 | 1.71 ppm |
2016-11-30 | 4792-018-1015 | 5.70 ppm |
2016-11-30 | 4792-021-0905 | 2.25 ppm |
2016-12-07 | 4417-036-0910 | 1.43 ppm |
2017-01-04 | 4792-018-1030 | 5.46 ppm |
2017-01-04 | 4792-021-0830 | 2.14 ppm |
2017-01-11 | 4792-018-1100 | 5.44 ppm |
2017-01-11 | 4792-021-1030 | 5.86 ppm |
2017-01-18 | 4792-018-0800 | 5.45 ppm |
2017-01-18 | 4792-021-0930 | 3.12 ppm |
2017-01-25 | 4792-018-0800 | 5.36 ppm |
2017-01-25 | 4792-021-0730 | 5.70 ppm |
2017-02-01 | 4792-018-1045 | 5.26 ppm |
2017-02-03 | 4792-021-1130 | 4.63 ppm |
2017-02-06 | 4417-003-1000 | 4.98 ppm |
2017-02-06 | 4417-011-1110 | 4.82 ppm |
2017-02-06 | 4417-013-0940 | 6.19 ppm |
2017-02-06 | 4417-016-1050 | 2.23 ppm |
2017-02-06 | 4417-036-0850 | 1.42 ppm |
2017-02-08 | 4792-018-0800 | 5.27 ppm |
2017-02-08 | 4792-021-0730 | 5.31 ppm |
2017-02-16 | 4792-018-0800 | 5.64 ppm |
2017-02-16 | 4792-021-0730 | 5.34 ppm |
2017-02-22 | 4792-018-1040 | 5.64 ppm |
2017-02-22 | 4792-021-0855 | 5.17 ppm |
2017-03-01 | 4792-018-0800 | 5.38 ppm |
2017-03-06 | 4417-011-0915 | 4.88 ppm |
2017-03-06 | 4417-011-0925 | 4.99 ppm |
2017-03-06 | 4417-012-0935 | 2.61 ppm |
2017-03-06 | 4417-016-0900 | 2.26 ppm |
2017-03-06 | 4417-016-0910 | 2.28 ppm |
2017-03-08 | 4792-018-0840 | 5.40 ppm |
2017-03-15 | 4417-016-1105 | 2.23 ppm |
2017-03-15 | 4792-018-1025 | 5.86 ppm |
2017-03-22 | 4792-018-1110 | 4.77 ppm |
2017-03-29 | 4792-018-0930 | 4.75 ppm |
2017-03-31 | 4792-021-1045 | 5.18 ppm |
2017-04-05 | 4792-018-1040 | 5.71 ppm |
2017-04-05 | 4792-021-1000 | 6.34 ppm |
2017-04-12 | 4792-018-0800 | 5.47 ppm |
2017-04-12 | 4792-021-0900 | 5.06 ppm |
2017-04-19 | 4792-018-0730 | 5.61 ppm |
2017-04-19 | 4792-021-0930 | 5.98 ppm |
2017-04-26 | 4792-018-1315 | 5.30 ppm |
2017-04-26 | 4792-021-1015 | 5.64 ppm |
2017-05-03 | 4792-018-1400 | 5.59 ppm |
2017-05-03 | 4792-021-1045 | 5.65 ppm |
2017-05-10 | 4792-018-1310 | 5.55 ppm |
2017-05-10 | 4792-021-1110 | 5.36 ppm |
2017-05-11 | 4417-011-1045 | 4.82 ppm |
2017-05-11 | 4417-013-0830 | 3.77 ppm |
2017-05-11 | 4417-016-0945 | 2.13 ppm |
2017-05-17 | 4792-018-1145 | 5.49 ppm |
2017-05-17 | 4792-021-1030 | 6.00 ppm |
2017-05-24 | 4792-018-0800 | 5.51 ppm |
2017-05-24 | 4792-021-0900 | 5.49 ppm |
2017-05-31 | 4792-018-0830 | 5.45 ppm |
2017-05-31 | 4792-021-1000 | 4.98 ppm |
2017-05-31 | 4417-032-0935 | 5.17 ppm |
2017-05-31 | 4417-036-0840 | 1.07 ppm |
2017-06-07 | 4792-018-0830 | 5.42 ppm |
2017-06-07 | 4792-021-0800 | 5.88 ppm |
2017-06-14 | 4792-018-0730 | 5.28 ppm |
2017-06-14 | 4792-021-0800 | 4.91 ppm |
2017-06-21 | 4792-018-0800 | 5.01 ppm |
2017-06-21 | 4792-021-0830 | 7.24 ppm |
2017-06-28 | 4792-018-0730 | 5.88 ppm |
2017-06-28 | 4792-021-0800 | 5.46 ppm |
2017-07-05 | 4792-018-0800 | 5.87 ppm |
2017-07-05 | 4792-021-0800 | 4.95 ppm |
2017-07-12 | 4792-018-1335 | 5.90 ppm |
2017-07-12 | 4792-021-1100 | 5.25 ppm |
2017-07-19 | 4792-018-0800 | 5.79 ppm |
2017-07-19 | 4792-021-0730 | 5.23 ppm |
2017-07-26 | 4792-018-0745 | 5.69 ppm |
2017-07-26 | 4792-021-0800 | 5.44 ppm |
2017-07-27 | 4417-011-1230 | 4.74 ppm |
2017-07-27 | 4417-013-1205 | 3.83 ppm |
2017-07-27 | 4417-036-1140 | 0.990 ppm |
2017-08-02 | 4792-018-1020 | 5.37 ppm |
2017-08-02 | 4792-021-1100 | 4.81 ppm |
2017-08-09 | 4792-018-0800 | 4.70 ppm |
2017-08-16 | 4792-018-0800 | 5.52 ppm |
2017-08-23 | 4792-018-0820 | 3.54 ppm |
2017-08-23 | 4792-021-0745 | 5.27 ppm |
2017-09-01 | 4792-018-0800 | 5.12 ppm |
2017-09-01 | 4792-021-0730 | 5.46 ppm |
2017-09-06 | 4792-018-0800 | 5.42 ppm |
2017-09-06 | 4792-021-1300 | ND |
2017-09-13 | 4792-018-0745 | 5.24 ppm |
2017-09-13 | 4792-021-0815 | 4.82 ppm |
2017-09-21 | 4792-018-1325 | 5.69 ppm |
2017-09-21 | 4792-021-1030 | 4.93 ppm |
2017-09-27 | 4792-018-0800 | 6.94 ppm |
2017-09-27 | 4792-021-0730 | 4.89 ppm |
2017-10-04 | 4792-018-1140 | 5.74 ppm |
2017-10-04 | 4792-021-1305 | 5.05 ppm |
2017-10-11 | 4792-018-0000 | 5.02 ppm |
2017-10-11 | 4792-021-0000 | 4.41 ppm |
2017-10-18 | 4792-018-0800 | 5.32 ppm |
2017-10-18 | 4792-021-0730 | 4.88 ppm |
2017-10-25 | 4792-018-0730 | 5.03 ppm |
2017-10-25 | 4792-021-0830 | 4.94 ppm |
2017-11-01 | 4792-018-1130 | 5.08 ppm |
2017-11-01 | 4792-021-1100 | 4.75 ppm |
2017-11-08 | 4792-018-0730 | 4.96 ppm |
2017-11-08 | 4792-021-0745 | 4.82 ppm |
2017-11-15 | 4792-018-0950 | 5.01 ppm |
2017-11-15 | 4792-021-0800 | 5.01 ppm |
2017-11-22 | 4792-018-0940 | 5.01 ppm |
2017-11-22 | 4792-021-0845 | 5.27 ppm |
2017-11-29 | 4417-011-1050 | 4.83 ppm |
2017-11-29 | 4417-013-0900 | 7.36 ppm |
2017-11-29 | 4792-018-0800 | 5.02 ppm |
2017-11-29 | 4792-021-0730 | 5.39 ppm |
2017-12-06 | 4792-018-0630 | 3.48 ppm |
2017-12-06 | 4792-021-0800 | 5.50 ppm |
2017-12-13 | 4792-018-0800 | 4.61 ppm |
2017-12-20 | 4792-018-0800 | 3.99 ppm |
2017-12-27 | 4792-018-0730 | 3.72 ppm |
2018-01-03 | 4792-018-0930 | 3.39 ppm |
2018-01-10 | 4792-018-0730 | 3.74 ppm |
2018-01-17 | 4792-018-0900 | 3.76 ppm |
2018-01-24 | 4792-018-1130 | 4.16 ppm |
2018-02-07 | 4792-018-0900 | 3.96 ppm |
2018-02-13 | 4417-011-1010 | 4.74 ppm |
2018-02-13 | 4417-016-0940 | 2.74 ppm |
2018-02-14 | 4792-018-0900 | 4.00 ppm |
2018-02-21 | 4792-018-0730 | 4.16 ppm |
2018-02-22 | 4417-003-0900 | 5.20 ppm |
2018-02-22 | 4417-013-0830 | 7.50 ppm |
2018-02-28 | 4792-018-0900 | 4.04 ppm |
2018-03-07 | 4792-018-1305 | 3.65 ppm |
2018-03-08 | 4417-012-0850 | 2.60 ppm |
2018-03-14 | 4792-018-0930 | 3.64 ppm |
2018-03-21 | 4792-018-1020 | 4.23 ppm |
2018-03-21 | 4792-021-0920 | 6.04 ppm |
2018-03-28 | 4792-018-0900 | 4.17 ppm |
2018-04-04 | 4792-018-0800 | 4.37 ppm |
2018-04-11 | 4792-018-0900 | 4.31 ppm |
2018-04-18 | 4792-018-1505 | 4.31 ppm |
2018-04-25 | 4792-018-0000 | 4.98 ppm |
2018-05-02 | 4792-018-0745 | 4.76 ppm |
2018-05-09 | 4792-018-0715 | 4.56 ppm |
2018-06-05 | 4417-032-1000 | 4.03 ppm |
2018-06-05 | 4417-036-0920 | 1.000 ppm |
2018-06-07 | 4417-011-1010 | 4.75 ppm |
2018-06-07 | 4417-013-1040 | 7.02 ppm |
2018-06-13 | 4792-021-1145 | 5.98 ppm |
2018-08-06 | 4417-011-1145 | 4.82 ppm |
2018-08-06 | 4417-013-0955 | 4.40 ppm |
2018-10-30 | 4417-011-0935 | 5.37 ppm |
2018-10-30 | 4417-013-1045 | 4.10 ppm |
2019-01-30 | 4792-018-1050 | 5.75 ppm |
2019-02-06 | 4792-018-1045 | 5.00 ppm |
2019-02-13 | 4792-018-0900 | 4.17 ppm |
2019-02-19 | 4417-003-0955 | 3.89 ppm |
2019-02-19 | 4417-011-1030 | 5.07 ppm |
2019-02-21 | 4417-012-0835 | 2.41 ppm |
2019-02-21 | 4417-013-0910 | 7.26 ppm |
2019-02-21 | 4417-016-0850 | 2.33 ppm |
2019-02-21 | 4792-018-1030 | 3.93 ppm |
2019-02-25 | 4417-032-1000 | 4.71 ppm |
2019-02-25 | 4417-036-0940 | 0.920 ppm |
2019-02-27 | 4792-018-0815 | 3.27 ppm |
2019-03-06 | 4792-018-0800 | 3.35 ppm |
2019-03-13 | 4792-018-0820 | 3.92 ppm |
2019-03-20 | 4792-018-1050 | 5.55 ppm |
2019-03-27 | 4792-018-0815 | 5.30 ppm |
2019-04-03 | 4792-018-1130 | 5.12 ppm |
2019-04-10 | 4792-018-0850 | 5.38 ppm |
2019-04-17 | 4792-018-0750 | 4.44 ppm |
2019-04-24 | 4792-018-0900 | 4.78 ppm |
2019-05-01 | 4792-018-1140 | 5.12 ppm |
2019-05-08 | 4792-018-0820 | 4.49 ppm |
2019-05-15 | 4792-018-0845 | 4.37 ppm |
2019-05-22 | 4792-018-0900 | 4.38 ppm |
2019-05-23 | 4417-011-0845 | 5.11 ppm |
2019-05-23 | 4417-013-0910 | 7.21 ppm |
2019-05-29 | 4792-018-0750 | 4.40 ppm |
2019-06-05 | 4792-018-1005 | 4.26 ppm |
2019-06-12 | 4792-018-1340 | 4.21 ppm |
2019-06-19 | 4792-018-1435 | 2.93 ppm |
2019-06-26 | 4792-018-1300 | 4.25 ppm |
2019-07-09 | 4792-018-1215 | 3.71 ppm |
2019-07-10 | 4792-018-1100 | 4.12 ppm |
2019-07-15 | 4417-011-1120 | 4.84 ppm |
2019-07-15 | 4417-013-0950 | 6.30 ppm |
2019-07-17 | 4792-018-1035 | 4.12 ppm |
2019-07-24 | 4792-018-0900 | 4.10 ppm |
2019-07-31 | 4792-018-1210 | 4.11 ppm |
2019-08-07 | 4792-018-1110 | 4.17 ppm |
2019-08-14 | 4792-018-0930 | 4.09 ppm |
2019-08-21 | 4792-018-0800 | 3.90 ppm |
2019-08-28 | 4792-018-0900 | 4.13 ppm |
2019-09-04 | 4792-018-0820 | 3.98 ppm |
2019-09-11 | 4792-018-0825 | 4.08 ppm |
2019-09-18 | 4792-018-1355 | 4.10 ppm |
2019-09-25 | 4792-018-1150 | 4.14 ppm |
2019-10-02 | 4792-018-0820 | 4.35 ppm |
2019-10-09 | 4792-018-0830 | 4.57 ppm |
2019-10-16 | 4792-018-0910 | 4.57 ppm |
2019-10-23 | 4792-018-0810 | 4.73 ppm |
2019-10-28 | 4417-011-0925 | 5.08 ppm |
2019-10-28 | 4417-013-1035 | 5.81 ppm |
2019-10-30 | 4792-018-0740 | 4.68 ppm |
2019-11-06 | 4792-018-0800 | 4.70 ppm |
2019-11-13 | 4792-018-0819 | 3.56 ppm |
2019-11-20 | 4792-018-0710 | 4.46 ppm |
2019-11-27 | 4792-018-0833 | 4.45 ppm |
2019-12-04 | 4792-018-1405 | 4.69 ppm |
2019-12-11 | 4792-018-0855 | 4.62 ppm |
2019-12-18 | 4792-018-0830 | 4.53 ppm |
2019-12-24 | 4792-018-0800 | 4.51 ppm |