Know Your Environment. Protect Your Health.

Nitrate and nitrite

Berwick Bayou Vista Water Works Commission

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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.10 ppm221.10 ppm
20190.1000 ppm220.1000 ppm
20200.300 ppm110.300 ppm
2021ND10ND
20220.110 ppm110.110 ppm
20230.1000 ppm110.1000 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
2018-01-25353704150011.10 ppm
2018-01-25353704150011.10 ppm
2019-01-15354426930010.1000 ppm
2019-01-15354426930010.1000 ppm
2020-02-04B2000551-0010.300 ppm
2021-03-25B2101308-001ND
2022-03-24357060970010.110 ppm
2023-01-30B2300408-0010.1000 ppm