Know Your Environment. Protect Your Health.

Nitrate

Cisco

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.

 

110

Samples

0

Samples exceeding legal limit (MCL)

96

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.315 ppm43ND - 0.460 ppm
20190.409 ppm880.220 ppm - 0.640 ppm
20200.383 ppm17170.190 ppm - 0.750 ppm
20210.332 ppm2523ND - 0.810 ppm
20220.476 ppm2928ND - 1.72 ppm
20231.01 ppm27270.150 ppm - 1.98 ppm

ppm = parts per million

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.14 ppm

The EWG health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.

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
2018-02-0518B0142-01_01ND
2018-05-2218E0962-010.370 ppm
2018-09-0518I0108-010.460 ppm
2018-11-1418K0442-01_010.431 ppm
2019-02-2019B0402-010.330 ppm
2019-05-2019E0649-010.380 ppm
2019-09-1819I0761-010.640 ppm
2019-10-2819J0974-010.540 ppm
2019-10-2819J0974-020.390 ppm
2019-11-2019K0604-010.270 ppm
2019-11-2019K0604-020.500 ppm
2019-12-1819L0453-010.220 ppm
2020-01-2020A0413-010.250 ppm
2020-01-2020A0413-020.310 ppm
2020-02-2420B0563-010.190 ppm
2020-02-2420B0563-020.320 ppm
2020-03-1820C0500-020.290 ppm
2020-04-1420D0220-010.220 ppm
2020-04-1420D0220-020.400 ppm
2020-05-2020E0337-010.210 ppm
2020-06-1720F0344-010.300 ppm
2020-06-1720F0344-020.750 ppm
2020-09-1520I0619-010.310 ppm
2020-10-2720J0881-020.510 ppm
2020-10-2920J0937-010.690 ppm
2020-11-1720K0423-010.280 ppm
2020-11-1720K0423-020.710 ppm
2020-12-0820L0258-010.290 ppm
2020-12-0820L0258-020.480 ppm
2021-01-1921A0339-010.310 ppm
2021-01-1921A0339-020.640 ppm
2021-02-0821B0225-010.340 ppm
2021-02-0821B0225-020.510 ppm
2021-03-1021C0410-010.250 ppm
2021-03-1021C0410-020.500 ppm
2021-03-1021C0411-010.250 ppm
2021-04-1921D0512-010.300 ppm
2021-04-1921D0512-020.570 ppm
2021-05-1921E0549-010.200 ppm
2021-05-1921E0549-020.400 ppm
2021-06-1421F0506-010.120 ppm
2021-06-1421F0506-020.440 ppm
2021-07-1221G0389-010.390 ppm
2021-07-1221G0389-02ND
2021-08-1621H0841-01ND
2021-08-1621H0841-020.350 ppm
2021-09-2021I0778-010.1000 ppm
2021-09-2021I0778-020.450 ppm
2021-10-1121J0318-010.670 ppm
2021-10-1121J0318-020.120 ppm
2021-11-0821K0336-010.810 ppm
2021-11-0821K0336-020.110 ppm
2021-12-1321L0413-010.370 ppm
2021-12-1321L0413-020.1000 ppm
2022-01-1122A0260-010.400 ppm
2022-01-1122A0260-020.110 ppm
2022-02-2122B0508-010.380 ppm
2022-02-2122B0508-020.120 ppm
2022-03-0922C0238-010.330 ppm
2022-03-0922C0238-020.1000 ppm
2022-03-0922C0238-03ND
2022-04-2022D0524-010.370 ppm
2022-04-2022D0524-020.110 ppm
2022-05-1022E0263-010.360 ppm
2022-05-1022E0263-020.1000 ppm
2022-06-2222F1206-010.250 ppm
2022-06-2222F1206-020.230 ppm
2022-07-2022G0783-010.600 ppm
2022-07-2022G0783-020.180 ppm
2022-07-2222G0875-010.690 ppm
2022-08-1722H0923-010.640 ppm
2022-08-1722H0923-020.180 ppm
2022-08-2322H1105-010.630 ppm
2022-08-2322H1105-020.170 ppm
2022-09-2122I0909-011.12 ppm
2022-09-2122I0909-020.330 ppm
2022-09-2622I1015-010.980 ppm
2022-10-1922J0941-011.06 ppm
2022-10-1922J0941-020.730 ppm
2022-11-2122K0607-010.250 ppm
2022-11-2122K0607-021.72 ppm
2022-12-0722L0191-011.36 ppm
2022-12-0722L0191-020.310 ppm
2023-01-1723A0275-010.860 ppm
2023-01-1723A0275-020.340 ppm
2023-02-1523B0512-011.000 ppm
2023-02-1523B0512-020.210 ppm
2023-02-1523B0512-030.150 ppm
2023-03-1523C0399-010.780 ppm
2023-03-1523C0399-020.340 ppm
2023-04-1923D0461-010.770 ppm
2023-04-1923D0461-020.180 ppm
2023-05-2223E0923-010.750 ppm
2023-05-2223E0923-020.600 ppm
2023-06-1923F0762-010.640 ppm
2023-06-1923F0762-020.260 ppm
2023-06-2223F0891-010.860 ppm
2023-06-2223F0891-020.680 ppm
2023-07-2023G0862-011.59 ppm
2023-07-2023G0862-021.79 ppm
2023-08-2223H1190-011.98 ppm
2023-08-2223H1190-021.44 ppm
2023-09-2523I0989-011.70 ppm
2023-09-2523I0989-021.54 ppm
2023-10-2423J0869-011.76 ppm
2023-10-2423J0869-021.09 ppm
2023-11-1523K0423-011.94 ppm
2023-11-1523K0423-021.39 ppm
2023-12-1323L0296-011.71 ppm
2023-12-1323L0296-020.910 ppm