Know Your Environment. Protect Your Health.

Nitrate

Woodbury City Water Department

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)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0733 ppm31ND - 0.220 ppm
20190.207 ppm32ND - 0.580 ppm
20200.0767 ppm31ND - 0.230 ppm
20210.150 ppm31ND - 0.450 ppm
2022ND20ND
2023ND20ND

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
2018-09-26L6980174-1ND
2018-09-26L6980174-20.220 ppm
2018-09-26L6980174-3ND
2019-11-18L7174171-1ND
2019-11-18L7174171-20.580 ppm
2019-11-18L7174171-30.0410 ppm
2020-01-29L7187091-1ND
2020-02-12L7188250-10.230 ppm
2020-02-19L7190025-1ND
2021-02-22630-13814-3-NO30.450 ppm
2021-02-23630-13847-3ND
2021-03-18630-14922-1ND
2022-10-18630-47723-1ND
2022-10-18630-47723-2ND
2023-11-16V134147NO3ND
2023-11-16V134148NO3ND