Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Nitrate and nitrite

Pleasant Hills-crossroads Water Systems

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND20ND
2014ND40ND
2015ND20ND
20160.0170 ppm42ND - 0.0340 ppm
2017ND40ND

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The 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
2012-08-14AD69339ND
2012-08-14AD69339ND
2013-11-05AD86648ND
2013-11-05AD86648ND
2014-08-11AD95238ND
2014-08-11AD95238ND
2014-08-11AD95243ND
2014-08-11AD95243ND
2015-09-0435206364009ND
2015-09-0435206364009ND
2016-12-2835288496004ND
2016-12-2835288496004ND
2016-12-28352884960050.0340 ppm
2016-12-28352884960050.0340 ppm
2017-08-1535331252002ND
2017-08-1535331252001ND
2017-08-1535331252002ND
2017-08-1535331252001ND