Know Your Environment. Protect Your Health.

Nitrate and nitrite

Utilities Inc. - North Park Water Supply

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)

16

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.160 ppm104ND - 0.400 ppm
20190.157 ppm146ND - 0.600 ppm
20200.120 ppm54ND - 0.200 ppm
20210.160 ppm54ND - 0.200 ppm
2022ND50ND
2023ND50ND

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
2018-11-26B1805585-004ND
2018-11-26B1805585-0020.400 ppm
2018-11-26B1805585-001ND
2018-11-26B1805585-003ND
2018-11-26B1805585-004ND
2018-11-26B1805585-0050.400 ppm
2018-11-26B1805585-003ND
2018-11-26B1805585-0020.400 ppm
2018-11-26B1805585-001ND
2018-11-26B1805585-0050.400 ppm
2019-02-26B1900784-005ND
2019-02-26B1900784-004ND
2019-02-26B1900784-0030.300 ppm
2019-02-26B1900784-002ND
2019-02-26B1900784-0010.600 ppm
2019-02-26B1900784-002ND
2019-02-26B1900784-0030.300 ppm
2019-02-26B1900784-004ND
2019-02-26B1900784-005ND
2019-02-26B1900784-0010.600 ppm
2019-09-19B1904334-0010.200 ppm
2019-09-19B1904334-0010.200 ppm
2019-10-15B1904643-001ND
2019-10-15B1904643-001ND
2020-07-28B2003756-0010.200 ppm
2020-07-28B2003756-0020.1000 ppm
2020-07-28B2003756-003ND
2020-07-28B2003756-0040.200 ppm
2020-12-14B2006632-0010.1000 ppm
2021-01-20B2100169-004ND
2021-01-20B2100169-0050.200 ppm
2021-01-20B2100169-0030.200 ppm
2021-01-20B2100169-0020.200 ppm
2021-01-20B2100169-0010.200 ppm
2022-03-07B2201045-006ND
2022-03-07B2201045-007ND
2022-03-07B2201045-008ND
2022-03-07B2201045-009ND
2022-03-07B2201045-010ND
2023-02-28B2300802-001ND
2023-02-28B2300802-002ND
2023-02-28B2300802-003ND
2023-02-28B2300802-004ND
2023-02-28B2300802-005ND