Know Your Environment. Protect Your Health.

Nitrate and nitrite

Midland-lonaconing

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.827 ppm330.610 ppm - 1.21 ppm
2019N/A00N/A
20200.570 ppm330.330 ppm - 0.790 ppm
20210.817 ppm330.590 ppm - 1.09 ppm
20220.240 ppm53ND - 0.500 ppm
2023N/A00N/A

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
2018-04-25E180038430011.21 ppm
2018-04-25E180038430020.660 ppm
2018-04-25E180038430030.610 ppm
2020-05-27E200036580020.790 ppm
2020-05-27E200036580030.590 ppm
2020-05-27E200036580040.330 ppm
2021-05-18E210033700011.09 ppm
2021-05-18E210033700020.770 ppm
2021-05-18E210033700030.590 ppm
2022-08-30E2300047002ND
2022-08-30E23000470030.400 ppm
2022-08-30E2300047004ND
2022-12-20E23001302010.300 ppm
2022-12-20E23001302020.500 ppm