Know Your Environment. Protect Your Health.

Nitrate

Mustang Valley 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.

 

31

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0621 ppm550.0251 ppm - 0.167 ppm
20190.0467 ppm550.0299 ppm - 0.0556 ppm
20200.0380 ppm550.0288 ppm - 0.0491 ppm
20210.0340 ppm660.0240 ppm - 0.0554 ppm
20220.0136 ppm52ND - 0.0558 ppm
20230.0812 ppm550.0373 ppm - 0.241 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
2018-02-20Q18068810010.167 ppm
2018-11-28Q18483730010.0398 ppm
2018-11-28Q18483730140.0251 ppm
2018-11-28Q18483730150.0351 ppm
2018-11-28Q18483730160.0434 ppm
2019-03-13Q19106540040.0556 ppm
2019-03-13Q19106540080.0433 ppm
2019-03-13Q19106540120.0508 ppm
2019-03-13Q19106540160.0299 ppm
2019-09-11Q19640310060.0540 ppm
2020-08-26Q20342430160.0491 ppm
2020-08-26Q20342430180.0381 ppm
2020-08-26Q20342430240.0335 ppm
2020-08-26Q20342430340.0288 ppm
2020-08-26Q20342430370.0404 ppm
2021-07-28Q21197590160.0241 ppm
2021-07-28Q21197590230.0328 ppm
2021-07-28Q21197590200.0324 ppm
2021-07-28Q21197590190.0351 ppm
2021-07-28Q21197590180.0554 ppm
2021-07-28Q21197590170.0240 ppm
2022-10-12Q2230979008ND
2022-10-12Q2230979009ND
2022-10-12Q2230979010ND
2022-10-12Q22309790110.0124 ppm
2022-10-12Q22309790120.0558 ppm
2023-07-24Q23292120130.0373 ppm
2023-07-24Q23292120140.0377 ppm
2023-10-31Q23465360220.0513 ppm
2023-10-31Q23465360230.241 ppm
2023-10-31Q23465360240.0386 ppm