Know Your Environment. Protect Your Health.

Nitrate

C R C Water Supply Corporation

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0653 ppm220.0610 ppm - 0.0695 ppm
20190.106 ppm220.0654 ppm - 0.146 ppm
20200.207 ppm220.0616 ppm - 0.352 ppm
20210.0512 ppm220.0465 ppm - 0.0559 ppm
20220.0769 ppm220.0744 ppm - 0.0793 ppm
20230.0707 ppm220.0677 ppm - 0.0737 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
2018-12-13Q18514830060.0610 ppm
2018-12-13Q18514830110.0695 ppm
2019-03-13Q19106240050.146 ppm
2019-03-13Q19106240150.0654 ppm
2020-03-18Q20119010080.352 ppm
2020-03-18Q20119010090.0616 ppm
2021-03-11Q21064780080.0465 ppm
2021-03-11Q21064780100.0559 ppm
2022-06-20Q22169430100.0744 ppm
2022-06-20Q22169430140.0793 ppm
2023-05-11Q23180050010.0737 ppm
2023-05-11Q23180050080.0677 ppm