Know Your Environment. Protect Your Health.

Nitrate

East Troy Waterworks

Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

 

16

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.835 ppm43ND - 1.80 ppm
20190.775 ppm42ND - 1.60 ppm
2020N/A00N/A
20210.909 ppm440.0590 ppm - 2.10 ppm
20220.850 ppm42ND - 2.00 ppm
2023N/A00N/A

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

The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppm = parts per million

All test results

Date Lab ID Result
2018-06-191062526ND
2018-06-1910625240.0410 ppm
2018-06-1910625251.50 ppm
2018-06-1910625271.80 ppm
2019-05-131120729ND
2019-05-131120727ND
2019-05-1311207281.50 ppm
2019-05-1311207301.60 ppm
2021-07-2112669420.0590 ppm
2021-07-2112669400.0770 ppm
2021-07-2112669411.40 ppm
2021-07-2112669432.10 ppm
2022-06-131317541ND
2022-06-131317543ND
2022-06-1313175421.40 ppm
2022-06-1313175442.00 ppm