Know Your Environment. Protect Your Health.

Nitrate

Twin Buttes Water System

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

24

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.365 ppm440.265 ppm - 0.452 ppm
20190.683 ppm440.195 ppm - 1.09 ppm
20200.441 ppm440.175 ppm - 0.667 ppm
20210.282 ppm440.222 ppm - 0.321 ppm
20220.273 ppm440.240 ppm - 0.318 ppm
20230.287 ppm440.195 ppm - 0.363 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
2018-02-28Q18086900010.354 ppm
2018-04-24Q18168580010.390 ppm
2018-07-17Q18282650020.265 ppm
2018-12-05Q18497630010.452 ppm
2019-03-06Q19095220021.09 ppm
2019-05-07Q19207880010.982 ppm
2019-07-18Q19460810020.195 ppm
2019-11-25Q19779730010.463 ppm
2020-03-04Q20083000010.667 ppm
2020-05-27Q20208540010.592 ppm
2020-07-29Q20296610010.175 ppm
2020-11-10Q20440860020.331 ppm
2021-03-08Q21060860010.321 ppm
2021-05-18Q21129770010.298 ppm
2021-07-20Q21191170010.222 ppm
2021-11-22Q21325350010.286 ppm
2022-02-14Q22053030010.240 ppm
2022-05-18Q22147580010.318 ppm
2022-07-27Q22215090010.293 ppm
2022-11-09Q22338530010.240 ppm
2023-02-15Q23063270010.303 ppm
2023-04-19Q23145550010.286 ppm
2023-08-10Q23332180010.195 ppm
2023-11-13Q23484380010.363 ppm