Know Your Environment. Protect Your Health.

Nitrate and nitrite

Honaker, Town of

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

 

27

Samples

0

Samples exceeding legal limit (MCL)

25

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.657 ppm75ND - 1.64 ppm
20190.770 ppm440.310 ppm - 1.62 ppm
20200.680 ppm440.320 ppm - 1.54 ppm
20210.535 ppm440.300 ppm - 1.12 ppm
20220.620 ppm440.300 ppm - 1.24 ppm
20230.553 ppm440.300 ppm - 1.10 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

ppm = parts per million

All test results

Date Lab ID Result
2018-04-03E180306922ND
2018-04-23E1803072351.19 ppm
2018-04-23E1803072371.64 ppm
2018-04-23E1803072390.420 ppm
2018-04-23E1803072410.340 ppm
2018-08-22E1807004201.01 ppm
2018-12-10E181001667ND
2019-08-06E1906079060.400 ppm
2019-12-09E1911021441.62 ppm
2019-12-09E1911021430.750 ppm
2019-12-09E1911021450.310 ppm
2020-07-28E2006095830.390 ppm
2020-10-14E2009055390.320 ppm
2020-10-14E2009055360.470 ppm
2020-10-14E2009055381.54 ppm
2021-07-21E2106081220.420 ppm
2021-10-12E2110011160.300 ppm
2021-10-12E2110011280.300 ppm
2021-12-13E2112008431.12 ppm
2022-07-19E2206095430.520 ppm
2022-10-11E2210000570.420 ppm
2022-10-11E2210000550.300 ppm
2022-10-11E2210000531.24 ppm
2023-08-14E2307051460.450 ppm
2023-09-12E2309000330.300 ppm
2023-09-12E2309000340.360 ppm
2023-09-12E2309000351.10 ppm