Know Your Environment. Protect Your Health.

Nitrate

Sky Harbour 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
20180.0124 ppm220.0113 ppm - 0.0134 ppm
20190.0442 ppm220.0423 ppm - 0.0461 ppm
20200.0287 ppm220.0264 ppm - 0.0310 ppm
20210.0426 ppm220.0423 ppm - 0.0428 ppm
20220.0443 ppm220.0272 ppm - 0.0614 ppm
20230.0235 ppm220.0219 ppm - 0.0251 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
2018-10-15Q18408170070.0113 ppm
2018-10-15Q18408170080.0134 ppm
2019-05-13Q19238150090.0461 ppm
2019-05-13Q19238150100.0423 ppm
2020-08-03Q20301720070.0310 ppm
2020-08-03Q20301720080.0264 ppm
2021-06-03Q21144190070.0423 ppm
2021-06-03Q21144190150.0428 ppm
2022-11-30Q22358760070.0614 ppm
2022-11-30Q22358760080.0272 ppm
2023-08-17Q23346970070.0251 ppm
2023-08-17Q23346970080.0219 ppm