Know Your Environment. Protect Your Health.

Nitrate

Crowley II Acre Subdivision

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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
20190.0198 ppm21ND - 0.0395 ppm
20200.0579 ppm220.0417 ppm - 0.0741 ppm
20210.0823 ppm220.0771 ppm - 0.0874 ppm
20220.0618 ppm220.0464 ppm - 0.0772 ppm
20230.0667 ppm220.0474 ppm - 0.0860 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 Lab ID Result
2019-05-29Q1930464001ND
2019-05-29Q19304640060.0395 ppm
2020-10-26Q20415440090.0741 ppm
2020-10-26Q20415440100.0417 ppm
2021-12-13Q21349780010.0874 ppm
2021-12-13Q21349780020.0771 ppm
2022-11-30Q22355960010.0464 ppm
2022-11-30Q22355960110.0772 ppm
2023-03-13Q23096360010.0860 ppm
2023-03-13Q23096360100.0474 ppm