Know Your Environment. Protect Your Health.

Nitrate and nitrite

Briarwood/kildaire

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.

 

30

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND50ND
2019ND50ND
20200.240 ppm51ND - 1.20 ppm
20210.320 ppm51ND - 1.60 ppm
20220.260 ppm51ND - 1.30 ppm
20230.448 ppm53ND - 1.50 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
2018-04-03CB03279-02ND
2018-04-03CB03280-01ND
2018-04-03CB03280-02ND
2018-04-03CB03280-03ND
2018-04-03CB03279-01ND
2019-04-09CC04083-03ND
2019-04-09CC04083-02ND
2019-04-09CC04083-01ND
2019-04-09CC04082-02ND
2019-04-09CC04082-01ND
2020-04-02CD03005-01ND
2020-04-02CD03005-021.20 ppm
2020-04-02CD03006-01ND
2020-04-02CD03006-02ND
2020-04-02CD03006-03ND
2021-04-14CE02636-01ND
2021-04-14CE02637-03ND
2021-04-14CE02637-02ND
2021-04-14CE02637-01ND
2021-04-14CE02636-021.60 ppm
2022-05-04CF02226-01ND
2022-05-04CF02226-02ND
2022-05-04CF02226-03ND
2022-05-05CF02225-01ND
2022-05-05CF02225-021.30 ppm
2023-05-17752-7094-1ND
2023-05-17752-7094-2ND
2023-05-17752-7094-30.410 ppm
2023-05-17752-7094-40.330 ppm
2023-05-23752-7380-11.50 ppm