Menu

EWG's Tap Water Database

Donate

Nitrite

Portland Water Bureau

Nitrite, closely related to the fertilizer chemical nitrate, comes from urban runoff and from fertilizer applied to agricultural lands to pollute drinking water. Nitrite is significantly more toxic than nitrate. Excessive nitrite in water can cause oxygen deprivation in infants and increase the risk of cancer.

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010ND20ND
2011ND20ND
2012ND20ND
2013ND10ND
2014ND20ND
2015ND20ND

ppm = parts per million.

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 1 ppm

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppm = parts per million.

EPA Maximum Contaminant
Level Goal (MCLG)1 ppm

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppm = parts per million.

All test results

Date Lab ID Result
2010-04-13BA91448-IND
2010-08-11BA95984-IND
2011-01-18BB1638-IND
2011-04-12K1103204001-IND
2012-01-22BB13243-IND
2012-04-10BB16085-IND
2013-04-09BB26971-IND
2014-04-08BB38036-IND
2014-07-08BB42035-IND
2015-03-31BB49816-IND
2015-06-17BB52444-IND