Know Your Environment. Protect Your Health.

Nitrate and nitrite

Heritage Ranch 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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
20190.1000 ppm42ND - 0.200 ppm
2020ND30ND
20210.1000 ppm31ND - 0.300 ppm
2022ND20ND
2023ND40ND

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
2018-05-10CA4010012_002_002-201805101306ND
2018-05-10CA4010012_001_001-201805101300ND
2018-11-01CA4010012_002_002-201811011318ND
2018-11-01CA4010012_001_001-201811011307ND
2019-05-09CA4010012_002_002-2019050912400.200 ppm
2019-05-09CA4010012_001_001-2019050912170.200 ppm
2019-11-04CA4010012_001_001-201911041310ND
2019-11-04CA4010012_002_002-201911041315ND
2020-05-07CA4010012_001_001-202005071035ND
2020-05-07CA4010012_002_002-202005071053ND
2020-11-19CA4010012_001_001-202011191330ND
2021-06-10CA4010012_001_001-2021061013220.300 ppm
2021-11-18CA4010012_002_002-202111181030ND
2021-11-18CA4010012_001_001-202111181020ND
2022-05-12CA4010012_001_001-202205120944ND
2022-05-12CA4010012_002_002-202205120953ND
2023-05-18CA4010012_001_001-202305180931ND
2023-05-18CA4010012_002_002-202305180948ND
2023-11-09CA4010012_001_001-202311091019ND
2023-11-09CA4010012_002_002-202311091028ND