Know Your Environment. Protect Your Health.

Nitrate and nitrite

Darbonne Ws South

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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND60ND
20200.0667 ppm32ND - 0.1000 ppm
20210.0333 ppm31ND - 0.1000 ppm
20220.0333 ppm31ND - 0.1000 ppm
2023ND30ND

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
2018-04-2335388789001ND
2018-04-2335388789002ND
2018-04-2335388789001ND
2018-04-2335388789002ND
2019-08-0735488807002ND
2019-08-0735488807003ND
2019-08-0735488807001ND
2019-08-0735488807002ND
2019-08-0735488807003ND
2019-08-0735488807001ND
2020-11-18B2006138-0020.1000 ppm
2020-11-18B2006138-0030.1000 ppm
2020-11-18B2006138-001ND
2021-10-14B2105873-0010.1000 ppm
2021-10-14B2105873-002ND
2021-10-14B2105873-003ND
2022-08-02B2203622-0040.1000 ppm
2022-08-02B2203622-005ND
2022-08-02B2203622-006ND
2023-05-18B2302145-001ND
2023-05-18B2302145-002ND
2023-05-18B2302145-003ND