Know Your Environment. Protect Your Health.

Nitrate and nitrite

Tecumseh, City of

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.

 

30

Samples

0

Samples exceeding legal limit (MCL)

22

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20182.30 ppm330.386 ppm - 3.48 ppm
20190.651 ppm73ND - 2.78 ppm
20201.56 ppm54ND - 2.91 ppm
20211.49 ppm54ND - 2.67 ppm
20221.42 ppm54ND - 2.36 ppm
20231.15 ppm54ND - 2.20 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
2018-06-115445230.386 ppm
2018-06-115445243.02 ppm
2018-06-115445253.48 ppm
2019-01-16593232ND
2019-05-20603914ND
2019-06-176030841.44 ppm
2019-06-176030822.78 ppm
2019-06-176030830.337 ppm
2019-08-21618020ND
2019-11-12640429ND
2020-06-156677172.91 ppm
2020-06-156677160.316 ppm
2020-06-156677152.57 ppm
2020-12-07702013ND
2020-12-077020121.99 ppm
2021-06-167282042.26 ppm
2021-06-167282030.420 ppm
2021-06-167282052.67 ppm
2021-11-307652782.08 ppm
2021-11-30765279ND
2022-06-137919172.36 ppm
2022-06-137919182.33 ppm
2022-06-137919190.335 ppm
2022-12-148285922.09 ppm
2022-12-14828591ND
2023-06-218572332.18 ppm
2023-06-218572310.394 ppm
2023-06-218572320.986 ppm
2023-12-12890048ND
2023-12-128900472.20 ppm