Know Your Environment. Protect Your Health.

Nitrate

Hornbrook Community Services District

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND30ND
2020ND30ND
2021ND40ND
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
2019-05-02CA4700513_001_001-201905021123ND
2019-08-01CA4700513_002_002-201908011110ND
2019-12-05CA4700513_004_004-201912050915ND
2020-02-06CA4700513_001_001-202002061030ND
2020-03-05CA4700513_002_002-202003050900ND
2020-03-05CA4700513_004_004-202003050855ND
2021-04-01CA4700513_004_004-202104010908ND
2021-04-01CA4700513_001_001-202104010925ND
2021-04-01CA4700513_002_002-202104010915ND
2021-09-29CA4700513_008_008-202109291606ND
2022-05-05CA4700513_001_001-202205050925ND
2022-06-02CA4700513_004_004-202206020905ND
2022-12-01CA4700513_002_002-202212010915ND
2023-02-02CA4700513_001_001-202302020842ND
2023-02-02CA4700513_002_002-202302020910ND
2023-02-02CA4700513_004_004-202302020918ND
2023-11-02CA4700513_008_008-202311020828ND