Know Your Environment. Protect Your Health.

Nitrate

Hca Roan Filter Plant

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
20190.260 ppm110.260 ppm
20200.110 ppm21ND - 0.220 ppm
20210.230 ppm54ND - 0.330 ppm
2022ND10ND
20230.280 ppm620.280 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
2018-08-17AA91047ND
2019-08-12AA983630.260 ppm
2020-06-1722436114.000.220 ppm
2020-10-1923201689.00ND
2021-01-0723731424.000.330 ppm
2021-04-0824266317.000.320 ppm
2021-07-0124848299.000.250 ppm
2021-07-2124848793.000.250 ppm
2021-07-2824848312.00ND
2022-08-1727255454.00ND
2023-02-2828367236.00ND
2023-05-0228921794.00ND
2023-07-2429320807.00ND
2023-07-2429320501.00ND
2023-08-2229519478.000.270 ppm
2023-11-1430089996.000.280 ppm