Know Your Environment. Protect Your Health.

Nitrate

Town of Westover Hills

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

18

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.201 ppm330.197 ppm - 0.206 ppm
20190.293 ppm330.268 ppm - 0.312 ppm
20200.282 ppm330.252 ppm - 0.328 ppm
20210.232 ppm330.197 ppm - 0.295 ppm
20220.148 ppm330.144 ppm - 0.153 ppm
20230.671 ppm330.635 ppm - 0.692 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
2018-01-22Q18022900020.206 ppm
2018-01-22Q18022900050.199 ppm
2018-01-22Q18022900010.197 ppm
2019-02-06Q19054970010.268 ppm
2019-02-06Q19054970020.300 ppm
2019-02-06Q19054970030.312 ppm
2020-11-23Q20469460020.252 ppm
2020-11-23Q20469460030.265 ppm
2020-11-23Q20469460040.328 ppm
2021-04-28Q21107410030.204 ppm
2021-04-28Q21107410050.197 ppm
2021-04-28Q21107410040.295 ppm
2022-03-03Q22073610010.144 ppm
2022-03-03Q22073610020.146 ppm
2022-03-03Q22073610030.153 ppm
2023-11-16Q23494000010.692 ppm
2023-11-16Q23494000020.687 ppm
2023-11-16Q23494000050.635 ppm