Know Your Environment. Protect Your Health.

Nitrate

Quinlan North 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)

19

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.141 ppm43ND - 0.360 ppm
20190.314 ppm440.271 ppm - 0.394 ppm
20200.418 ppm440.371 ppm - 0.478 ppm
20210.424 ppm440.125 ppm - 0.588 ppm
20220.260 ppm440.108 ppm - 0.362 ppm
20230.401 ppm440.260 ppm - 0.512 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
2018-02-13Q1805807001ND
2018-05-08Q18185390020.360 ppm
2018-08-15Q18326630010.0759 ppm
2018-11-29Q18487000010.128 ppm
2019-03-05Q19092230010.394 ppm
2019-06-05Q19321260090.281 ppm
2019-09-23Q19674520010.271 ppm
2019-12-12Q19799560010.308 ppm
2020-02-19Q20063930050.478 ppm
2020-05-21Q20204280010.393 ppm
2020-09-21Q20373860010.430 ppm
2020-12-15Q20496710020.371 ppm
2021-02-23Q21045820050.422 ppm
2021-06-10Q21152460020.588 ppm
2021-09-15Q21252750010.560 ppm
2021-11-04Q21309990010.125 ppm
2022-02-25Q22066280060.301 ppm
2022-05-11Q22141740010.267 ppm
2022-08-23Q22249810010.108 ppm
2022-12-07Q22366570010.362 ppm
2023-02-16Q23064070010.512 ppm
2023-05-17Q23186570050.469 ppm
2023-09-19Q23402450010.361 ppm
2023-11-16Q23494360010.260 ppm