Know Your Environment. Protect Your Health.

Nitrate and nitrite

Hampton

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0700 ppm31ND - 0.210 ppm
20190.0800 ppm31ND - 0.240 ppm
20200.157 ppm32ND - 0.240 ppm
2021ND30ND
2022ND20ND
20230.340 ppm220.330 ppm - 0.350 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
2018-06-12AJ91441ND
2018-06-12AJ914420.210 ppm
2018-06-12AJ91443ND
2019-05-22AK18175ND
2019-05-22AK18176ND
2019-05-22AK181790.240 ppm
2020-06-15AK483200.230 ppm
2020-06-15AK483210.240 ppm
2020-06-15AK48322ND
2021-05-13AK75118ND
2021-05-13AK75119ND
2021-05-13AK75120ND
2022-05-02AL00097ND
2022-05-02AL00098ND
2023-05-03AL307690.330 ppm
2023-05-03AL307700.350 ppm