Know Your Environment. Protect Your Health.

Nitrate and nitrite

Sierra Cedars Community Services District

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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND40ND
2020ND10ND
2021N/A00N/A
20220.130 ppm31ND - 0.390 ppm
2023N/A00N/A

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
2019-08-21CA1010052_006_006-201908211300ND
2019-12-19CA1010052_002_002-201912191330ND
2019-12-19CA1010052_001_001-201912191330ND
2019-12-19CA1010052_008_008-201912191330ND
2020-03-24CA1010052_006_006-202003241045ND
2022-11-15CA1010052_001_001-2022111511000.390 ppm
2022-11-15CA1010052_008_008-202211151115ND
2022-11-15CA1010052_002_002-202211151045ND