Know Your Environment. Protect Your Health.

Nitrate

Quinlan South Subdivision

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)

21

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.451 ppm440.119 ppm - 0.596 ppm
20190.537 ppm440.328 ppm - 0.755 ppm
20200.436 ppm440.0950 ppm - 0.967 ppm
20210.530 ppm440.176 ppm - 0.924 ppm
20220.375 ppm440.239 ppm - 0.565 ppm
20230.429 ppm440.0625 ppm - 0.719 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
2018-02-13Q18058080010.539 ppm
2018-05-08Q18185400050.548 ppm
2018-08-15Q18326640010.119 ppm
2018-11-29Q18487010010.596 ppm
2019-03-05Q19092240010.755 ppm
2019-06-05Q19321270090.567 ppm
2019-09-23Q19674530010.328 ppm
2019-12-12Q19799570010.499 ppm
2020-02-19Q20063970050.967 ppm
2020-05-21Q20204290020.0950 ppm
2020-09-21Q20373870010.344 ppm
2020-12-15Q20496720020.336 ppm
2021-02-23Q21045830050.924 ppm
2021-06-10Q21152500010.281 ppm
2021-09-15Q21252820010.740 ppm
2021-11-04Q21310050010.176 ppm
2022-02-25Q22066330080.565 ppm
2022-05-11Q22141780010.316 ppm
2022-08-23Q22249820010.239 ppm
2022-12-07Q22366620010.381 ppm
2023-02-16Q23064110010.593 ppm
2023-05-17Q23186610050.0625 ppm
2023-09-19Q23402490010.719 ppm
2023-11-16Q23494410010.342 ppm