Know Your Environment. Protect Your Health.

Nitrate and nitrite

Amon G Carter Lake 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)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.484 ppm110.484 ppm
20190.364 ppm110.364 ppm
20201.29 ppm111.29 ppm
20210.322 ppm110.322 ppm
20220.462 ppm110.462 ppm
20230.730 ppm110.730 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

ppm = parts per million

All test results

Date Lab ID Result
2018-02-27Q18079410020.484 ppm
2019-02-20Q19074890020.364 ppm
2020-03-18Q20119780021.29 ppm
2021-03-10Q21063790020.322 ppm
2022-03-07Q22076500010.462 ppm
2023-01-24Q23032940010.730 ppm