Know Your Environment. Protect Your Health.

Nitrate and nitrite

Mustang Valley Water Supply Corporation

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

 

6

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
20190.0467 ppm550.0299 ppm - 0.0556 ppm
2020N/A00N/A
20210.0328 ppm110.0328 ppm
2022N/A00N/A
2023N/A00N/A

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

ppm = parts per million

All test results

Date Lab ID Result
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
2021-07-28Q21197590230.0328 ppm