Know Your Environment. Protect Your Health.

Nitrate

Erec Water System

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.

 

37

Samples

0

Samples exceeding legal limit (MCL)

32

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.17 ppm660.190 ppm - 3.20 ppm
20191.29 ppm330.220 ppm - 3.40 ppm
20201.83 ppm76ND - 4.90 ppm
20211.60 ppm770.0430 ppm - 4.10 ppm
20221.73 ppm76ND - 4.80 ppm
20231.43 ppm76ND - 4.40 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

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 Result
2018-02-282.90 ppm
2018-02-280.190 ppm
2018-02-280.240 ppm
2018-03-153.20 ppm
2018-03-150.280 ppm
2018-03-150.220 ppm
2019-03-010.220 ppm
2019-03-013.40 ppm
2019-03-010.250 ppm
2020-03-091.70 ppm
2020-03-094.90 ppm
2020-03-092.00 ppm
2020-03-09ND
2020-03-100.220 ppm
2020-03-100.220 ppm
2020-03-103.80 ppm
2021-06-020.260 ppm
2021-06-021.60 ppm
2021-06-020.230 ppm
2021-06-024.10 ppm
2021-06-021.80 ppm
2021-06-023.20 ppm
2021-06-020.0430 ppm
2022-03-091.50 ppm
2022-03-090.150 ppm
2022-03-094.80 ppm
2022-03-091.90 ppm
2022-03-090.190 ppm
2022-03-093.60 ppm
2022-03-09ND
2023-03-13ND
2023-03-130.0920 ppm
2023-03-132.10 ppm
2023-03-134.40 ppm
2023-03-140.200 ppm
2023-03-140.300 ppm
2023-03-142.90 ppm