Know Your Environment. Protect Your Health.

Nitrate

Blackjack Water Supply Corporation

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
20180.0580 ppm220.0130 ppm - 0.103 ppm
20190.0640 ppm220.0353 ppm - 0.0927 ppm
20200.00635 ppm21ND - 0.0127 ppm
20210.0159 ppm220.0120 ppm - 0.0197 ppm
20220.0467 ppm220.0377 ppm - 0.0557 ppm
20230.0418 ppm220.0324 ppm - 0.0512 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
2018-03-22Q18116490030.0130 ppm
2018-03-22Q18116490120.103 ppm
2019-05-21Q19270300050.0353 ppm
2019-05-21Q19270300100.0927 ppm
2020-03-09Q20084290070.0127 ppm
2020-03-09Q2008429008ND
2021-09-29Q21267050090.0197 ppm
2021-09-29Q21267050100.0120 ppm
2022-06-13Q22163780020.0377 ppm
2022-06-13Q22163780030.0557 ppm
2023-04-03Q23120180010.0324 ppm
2023-04-03Q23120180020.0512 ppm