Know Your Environment. Protect Your Health.

Nitrate and nitrite

Darbonne Ws North

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.

 

44

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0207 ppm128ND - 0.0410 ppm
2019ND120ND
20200.0750 ppm43ND - 0.1000 ppm
20210.1000 ppm43ND - 0.200 ppm
20220.0500 ppm82ND - 0.200 ppm
2023ND40ND

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
2018-03-1535381271001ND
2018-03-15353805240050.0410 ppm
2018-03-15353805240040.0260 ppm
2018-03-15353805240030.0290 ppm
2018-03-15353805240020.0280 ppm
2018-03-1535380524001ND
2018-03-15353805240020.0280 ppm
2018-03-15353805240030.0290 ppm
2018-03-15353805240040.0260 ppm
2018-03-15353805240050.0410 ppm
2018-03-1535381271001ND
2018-03-1535380524001ND
2019-09-0935496832001ND
2019-09-0935496832005ND
2019-09-0935496832004ND
2019-09-0935496832002ND
2019-09-0935496832001ND
2019-09-0935496832005ND
2019-09-0935496832004ND
2019-09-0935496832003ND
2019-09-0935496832002ND
2019-09-0935496832003ND
2019-09-1035496825001ND
2019-09-1035496825001ND
2020-11-18B2006135-0010.1000 ppm
2020-11-18B2006137-0010.1000 ppm
2020-11-18B2006137-0020.1000 ppm
2020-11-18B2006137-003ND
2021-10-14B2105874-0020.1000 ppm
2021-10-14B2105874-004ND
2021-10-14B2105874-0030.200 ppm
2021-10-14B2105874-0010.1000 ppm
2022-08-22B2204047-001ND
2022-08-22B2204047-002ND
2022-08-22B2204047-0030.200 ppm
2022-08-22B2204047-004ND
2022-08-31B2204245-005ND
2022-08-31B2204245-006ND
2022-08-31B2204245-007ND
2022-08-31B2204245-0080.200 ppm
2023-10-26B2304761-001ND
2023-10-26B2304761-002ND
2023-10-26B2304761-003ND
2023-10-26B2304761-004ND