Know Your Environment. Protect Your Health.

Nitrate

Mountain Springs 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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0354 ppm440.0165 ppm - 0.0597 ppm
20190.0190 ppm43ND - 0.0329 ppm
20200.0200 ppm43ND - 0.0321 ppm
20210.0147 ppm43ND - 0.0338 ppm
20220.0320 ppm440.0151 ppm - 0.0475 ppm
20230.0244 ppm440.0160 ppm - 0.0335 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
2018-03-13Q18101910080.0165 ppm
2018-03-13Q18101910090.0597 ppm
2018-03-13Q18101910070.0398 ppm
2018-06-28Q18260590030.0257 ppm
2019-01-28Q19040510010.0221 ppm
2019-01-28Q1904051002ND
2019-01-28Q19040510030.0329 ppm
2019-01-28Q19040510040.0210 ppm
2020-05-13Q20193390030.0318 ppm
2020-11-05Q20432350180.0162 ppm
2020-11-05Q20432350240.0321 ppm
2020-11-05Q2043235025ND
2021-11-16Q21320040090.0103 ppm
2021-11-16Q2132004012ND
2021-11-16Q21320040110.0148 ppm
2021-11-16Q21320040100.0338 ppm
2022-10-18Q22317350010.0475 ppm
2022-10-18Q22317350060.0329 ppm
2022-10-18Q22317350070.0151 ppm
2022-12-06Q22363310010.0324 ppm
2023-11-30Q23510330130.0164 ppm
2023-11-30Q23510330140.0317 ppm
2023-11-30Q23510330150.0160 ppm
2023-12-13Q23534130080.0335 ppm