Know Your Environment. Protect Your Health.

Nitrate and nitrite

Pulaski County Public Water Supply District 2

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.

 

36

Samples

0

Samples exceeding legal limit (MCL)

20

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.286 ppm65ND - 0.690 ppm
20190.288 ppm65ND - 0.740 ppm
20200.276 ppm65ND - 0.701 ppm
20210.333 ppm65ND - 0.895 ppm
20220.321 ppm65ND - 0.779 ppm
20230.363 ppm65ND - 0.922 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
2018-02-07AD146000.550 ppm
2018-02-28AD145510.270 ppm
2018-02-28AD145530.690 ppm
2018-02-28AD145540.0840 ppm
2018-02-28AD145550.120 ppm
2018-03-05AD17400ND
2019-02-13AD397300.300 ppm
2019-02-13AD397310.560 ppm
2019-02-13AD397290.0390 ppm
2019-02-13AD397280.740 ppm
2019-02-13AD397270.0900 ppm
2019-02-13AD39726ND
2020-02-1420015490.0850 ppm
2020-02-1420015480.302 ppm
2020-02-1420015470.0370 ppm
2020-02-1420015500.531 ppm
2020-02-142001551ND
2020-02-1420015520.701 ppm
2021-02-2221004180.895 ppm
2021-02-2221007860.309 ppm
2021-02-2221007850.600 ppm
2021-02-2221004200.112 ppm
2021-02-222100421ND
2021-02-2221004190.0820 ppm
2022-02-1022020840.779 ppm
2022-02-1022020850.189 ppm
2022-02-1022020830.589 ppm
2022-02-1022020860.0420 ppm
2022-02-102202087ND
2022-02-1022020820.327 ppm
2023-02-0923007050.0810 ppm
2023-02-092300707ND
2023-02-0923007040.922 ppm
2023-02-0923007020.339 ppm
2023-02-0923007060.201 ppm
2023-02-0923007030.632 ppm