Know Your Environment. Protect Your Health.

Nitrate and nitrite

Crawfordville 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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
20190.250 ppm32ND - 0.390 ppm
20200.123 ppm31ND - 0.370 ppm
20210.107 ppm31ND - 0.320 ppm
20220.150 ppm21ND - 0.300 ppm
20230.1000 ppm31ND - 0.300 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
2018-09-06AK00053ND
2018-09-06AK00054ND
2018-09-06AK00052ND
2019-08-15AK264120.360 ppm
2019-08-15AK26413ND
2019-11-14AK368220.390 ppm
2020-09-01AK57018ND
2020-09-01AK570170.370 ppm
2020-09-01AK57012ND
2021-07-15AK800900.320 ppm
2021-07-15AK80091ND
2021-07-15AK80092ND
2022-08-11AL095510.300 ppm
2022-12-20AL22833ND
2023-08-15AL40664ND
2023-08-15AL40665ND
2023-08-15AL406660.300 ppm