Know Your Environment. Protect Your Health.

Nitrate and nitrite

Cecilia Water Corporation

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND80ND
20200.0500 ppm42ND - 0.1000 ppm
20210.0820 ppm32ND - 0.200 ppm
2022ND20ND
2023ND30ND

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
2018-02-01AE20656ND
2018-02-01AE20658ND
2018-02-01AE20656ND
2018-02-01AE20658ND
2019-02-18B1900699-001ND
2019-02-18B1900699-002ND
2019-02-18B1900699-003ND
2019-02-1835449823001ND
2019-02-18B1900699-001ND
2019-02-18B1900699-002ND
2019-02-18B1900699-003ND
2019-02-1835449823001ND
2020-03-30B2001618-001ND
2020-04-2235545476001ND
2020-09-28B2005082-0010.1000 ppm
2020-12-07B2006492-0030.1000 ppm
2021-02-01B2100452-003ND
2021-04-09356297620030.0460 ppm
2021-05-03B2102117-0030.200 ppm
2022-01-31B2200468-004ND
2022-01-31B2200468-005ND
2023-02-13B2300622-004ND
2023-02-13B2300622-005ND
2023-11-06B2304831-001ND