Know Your Environment. Protect Your Health.

Nitrate

Holland Water District

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0250 ppm21ND - 0.0500 ppm
2019ND20ND
2020ND20ND
20210.0775 ppm220.0760 ppm - 0.0790 ppm
2022ND20ND
20230.0550 ppm220.0500 ppm - 0.0600 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
2018-05-0218P006333ND
2018-05-0218P006332A0.0500 ppm
2019-05-0719P005759ND
2019-05-0719P005758ND
2020-05-0520P007674ND
2020-05-0520P007673ND
2021-05-0421P0043770.0790 ppm
2021-05-0421P0043760.0760 ppm
2022-05-0322P002427ND
2022-05-0322P002428ND
2023-06-0123P0031790.0600 ppm
2023-06-0123P0031830.0500 ppm