Know Your Environment. Protect Your Health.

Nitrate

New 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)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0917 ppm440.0209 ppm - 0.261 ppm
20190.0338 ppm440.0199 ppm - 0.0430 ppm
20200.0412 ppm440.0215 ppm - 0.0570 ppm
20210.0391 ppm440.0314 ppm - 0.0510 ppm
20220.0787 ppm440.0267 ppm - 0.161 ppm
20230.0351 ppm440.0151 ppm - 0.0494 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
2018-06-06Q18225070140.0209 ppm
2018-06-06Q18225070150.0384 ppm
2018-06-06Q18225070130.261 ppm
2018-09-19Q18375970010.0463 ppm
2019-06-03Q19308480010.0367 ppm
2019-06-03Q19308480020.0430 ppm
2019-09-23Q19681230030.0354 ppm
2019-12-10Q19795490030.0199 ppm
2020-11-09Q20437450190.0345 ppm
2020-11-09Q20437450210.0215 ppm
2020-11-09Q20437450220.0519 ppm
2020-11-09Q20437450230.0570 ppm
2021-04-15Q21097630200.0314 ppm
2021-04-15Q21097630290.0340 ppm
2021-04-15Q21097630220.0510 ppm
2021-04-15Q21097630210.0399 ppm
2022-05-09Q22137790030.0896 ppm
2022-05-09Q22137790080.161 ppm
2022-05-09Q22137790130.0267 ppm
2022-05-09Q22137790140.0373 ppm
2023-06-15Q23227670130.0323 ppm
2023-06-15Q23227670240.0494 ppm
2023-06-15Q23227670250.0151 ppm
2023-06-15Q23227670260.0436 ppm