Know Your Environment. Protect Your Health.

Nitrate and nitrite

Croppers 1st 4th and 5th Addition

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

 

36

Samples

0

Samples exceeding legal limit (MCL)

25

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
20190.585 ppm43ND - 1.11 ppm
20201.26 ppm54ND - 1.91 ppm
20210.800 ppm54ND - 1.67 ppm
20221.35 ppm770.640 ppm - 1.91 ppm
20230.511 ppm148ND - 1.65 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

ppm = parts per million

All test results

Date Lab ID Result
2018-02-2018B0439-01_01ND
2019-02-1919B0361-010.700 ppm
2019-05-2819E0878-010.530 ppm
2019-09-1019I0361-01ND
2019-11-1819K0491-011.11 ppm
2020-02-1020B0199-011.37 ppm
2020-05-0520E0064-011.39 ppm
2020-09-0120I0099-011.61 ppm
2020-11-1620K0345-011.91 ppm
2020-11-1820K0465-01ND
2021-02-0921B0231-011.67 ppm
2021-02-1621B0320-010.140 ppm
2021-05-0321E0023-011.30 ppm
2021-09-0821I0257-01ND
2021-11-2921K0903-010.890 ppm
2022-03-0822C0215-011.45 ppm
2022-05-0222E0008-011.49 ppm
2022-08-2222H1106-011.54 ppm
2022-10-3122K0004-011.91 ppm
2022-11-0222K0184-011.09 ppm
2022-11-1522K0421-011.35 ppm
2022-12-0622L0135-010.640 ppm
2023-01-1023A0097-010.420 ppm
2023-01-2423A0423-01ND
2023-02-0623B0162-010.510 ppm
2023-03-0623C0157-01ND
2023-04-0323D0028-010.440 ppm
2023-05-0223E0097-011.22 ppm
2023-06-0623F0257-011.14 ppm
2023-07-1123G0439-011.65 ppm
2023-07-1223G0530-010.870 ppm
2023-08-0823H0475-01ND
2023-09-1223I0383-01ND
2023-10-0323J0074-01ND
2023-11-0723K0178-01ND
2023-12-0523L0088-010.900 ppm