Know Your Environment. Protect Your Health.

Nitrate

Consolidated Irrig District 19 System 2

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

16

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.733 ppm440.418 ppm - 1.05 ppm
20190.658 ppm440.417 ppm - 1.03 ppm
2020N/A00N/A
20210.641 ppm440.419 ppm - 0.988 ppm
2022N/A00N/A
20230.426 ppm440.421 ppm - 0.436 ppm

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
2018-06-261.05 ppm
2018-06-260.585 ppm
2018-06-260.878 ppm
2018-06-260.418 ppm
2019-06-171.03 ppm
2019-06-170.417 ppm
2019-06-170.721 ppm
2019-06-170.462 ppm
2021-06-1541296110.988 ppm
2021-06-1541296130.674 ppm
2021-06-1541296140.481 ppm
2021-06-1541296120.419 ppm
2023-03-2844369780.423 ppm
2023-03-2844369760.436 ppm
2023-03-2844369790.421 ppm
2023-03-2844369810.423 ppm