Know Your Environment. Protect Your Health.

Nitrate and nitrite

Fort Johnson South 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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND120ND
20190.0130 ppm42ND - 0.0260 ppm
2020ND20ND
2021ND20ND
20220.0500 ppm21ND - 0.1000 ppm
2023ND20ND

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
2018-09-1135417514003ND
2018-09-1135417514001ND
2018-09-1135417514002ND
2018-09-1135417514003ND
2018-09-1135417514002ND
2018-09-1135417514001ND
2018-09-1335417861001ND
2018-09-1335417861002ND
2018-09-1335417861003ND
2018-09-1335417861001ND
2018-09-1335417861002ND
2018-09-1335417861003ND
2019-06-1335475730004ND
2019-06-1335475730004ND
2019-06-13354757300030.0260 ppm
2019-06-13354757300030.0260 ppm
2020-06-0235554305001ND
2020-06-0235554305002ND
2021-08-24B2104022-007ND
2021-08-24B2104022-008ND
2022-08-05B2203689-0010.1000 ppm
2022-08-05B2203689-002ND
2023-05-08B2301967-001ND
2023-05-08B2301967-002ND