Know Your Environment. Protect Your Health.

Nitrate

Quimper

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.

 

44

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.398 ppm84ND - 2.20 ppm
20190.412 ppm123ND - 2.16 ppm
2020N/A00N/A
20210.288 ppm81ND - 2.30 ppm
20220.284 ppm81ND - 2.27 ppm
20230.225 ppm81ND - 1.80 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
2018-05-23ND
2018-05-230.140 ppm
2018-05-230.710 ppm
2018-05-230.130 ppm
2018-05-232.20 ppm
2018-05-23ND
2018-05-23ND
2018-05-23ND
2019-04-022.01 ppm
2019-04-022.16 ppm
2019-04-02ND
2019-04-02ND
2019-04-090.770 ppm
2019-04-09ND
2019-04-09ND
2019-04-09ND
2019-06-12ND
2019-06-12ND
2019-06-12ND
2019-06-25ND
2021-04-214102177ND
2021-04-214102175ND
2021-04-2141021782.30 ppm
2021-04-214102176ND
2021-04-214102174ND
2021-04-214102179ND
2021-05-254118617ND
2021-05-254118618ND
2022-04-064262892ND
2022-04-064262895ND
2022-04-064262896ND
2022-04-064262897ND
2022-04-064262898ND
2022-04-0642628932.27 ppm
2022-04-064262894ND
2022-04-134268289ND
2023-04-2044431011.80 ppm
2023-04-204443102ND
2023-04-204443106ND
2023-04-204443105ND
2023-04-204443104ND
2023-04-204443103ND
2023-04-204443107ND
2023-04-204443100ND