Know Your Environment. Protect Your Health.

Nitrate

Ventura County Waterworks District No. 19 - Somis

Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

 

19

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND30ND
2020ND30ND
2021ND30ND
2022ND30ND
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

The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppm = parts per million

All test results

Date Lab ID Result
2018-08-01CA5610015_002_002-201808011404ND
2018-08-01CA5610015_007_007-201808011337ND
2018-08-14CA5610015_001_001-201808141147ND
2019-08-07CA5610015_002_002-201908071345ND
2019-08-07CA5610015_007_007-201908071317ND
2019-08-07CA5610015_001_001-201908071409ND
2020-08-03CA5610015_007_007-202008031556ND
2020-08-04CA5610015_002_002-202008041411ND
2020-08-04CA5610015_001_001-202008041455ND
2021-08-04CA5610015_001_001-202108041007ND
2021-08-04CA5610015_007_007-202108040940ND
2021-08-04CA5610015_002_002-202108040830ND
2022-08-16CA5610015_002_002-202208160933ND
2022-08-17CA5610015_007_007-202208170841ND
2022-08-22CA5610015_001_001-202208221052ND
2023-08-08CA5610015_002_002-202308081515ND
2023-08-08CA5610015_001_001-202308081445ND
2023-08-09CA5610015_007_007-202308090930ND
2023-08-14CA5610015_001_001-202308141100ND