Know Your Environment. Protect Your Health.

Nitrate and nitrite

Solano Irrigation District - Pleasant Hills Ranch

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND60ND
2019ND30ND
2020ND10ND
2021ND10ND
2022ND20ND
2023ND10ND

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
2018-05-10CA4810025_004_005-201805101000ND
2018-05-10CA4810025_004_004-201805101015ND
2018-08-23CA4810025_004_005-201808230945ND
2018-08-23CA4810025_004_004-201808230920ND
2018-11-15CA4810025_004_005-201811151110ND
2018-11-15CA4810025_004_004-201811151120ND
2019-03-12CA4810025_002_002-201903120905ND
2019-03-18CA4810025_001_001-201903181000ND
2019-03-18CA4810025_004_005-201903181000ND
2020-03-10CA4810025_002_002-202003100815ND
2021-03-23CA4810025_004_005-202103231040ND
2022-03-15CA4810025_002_002-202203150737ND
2022-03-15CA4810025_004_005-202203151100ND
2023-03-23CA4810025_004_005-202303230940ND