Know Your Environment. Protect Your Health.

Nitrate and nitrite

Tipton

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.

 

22

Samples

6

Samples exceeding legal limit (MCL)

21

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.367 ppm330.337 ppm - 0.383 ppm
20195.86 ppm330.258 ppm - 16.8 ppm
20204.12 ppm43ND - 15.7 ppm
202113.0 ppm446.36 ppm - 18.1 ppm
20223.76 ppm440.296 ppm - 12.9 ppm
20236.20 ppm440.285 ppm - 14.2 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
2018-06-0418063280.383 ppm
2018-07-0218072840.337 ppm
2018-10-0118101160.382 ppm
2019-04-01190430716.8 ppm
2019-07-1819076880.258 ppm
2019-10-0719102740.520 ppm
2020-01-0620013330.150 ppm
2020-06-11101511-010.649 ppm
2020-07-06101845-01ND
2020-10-05103235-0115.7 ppm
2021-01-04104409-0117.7 ppm
2021-04-05105782-0118.1 ppm
2021-09-24108391-019.79 ppm
2021-10-04108454-016.36 ppm
2022-01-03109798-011.43 ppm
2022-04-04111097-0112.9 ppm
2022-07-11112389-010.296 ppm
2022-10-03113689-010.415 ppm
2023-01-09115045-019.73 ppm
2023-04-03116431-0114.2 ppm
2023-07-10117887-010.602 ppm
2023-10-02119239-010.285 ppm