Know Your Environment. Protect Your Health.

Nitrate and nitrite

Hickory Grove Water System

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND80ND
20200.1000 ppm110.1000 ppm
2021ND10ND
20220.1000 ppm110.1000 ppm
20230.500 ppm110.500 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
2018-04-1135386360003ND
2018-04-1135386360003ND
2019-01-2235444047001ND
2019-01-2235444047002ND
2019-01-2235444047003ND
2019-01-2235444047004ND
2019-01-2235444047001ND
2019-01-2235444047002ND
2019-01-2235444047003ND
2019-01-2235444047004ND
2020-06-30B2003315-0010.1000 ppm
2021-11-30B2106413-005ND
2022-11-21B2205611-0010.1000 ppm
2023-11-21B2305054-0010.500 ppm