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EWG's Tap Water Database — 2021 UPDATE

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Nitrate and nitrite

Truckee-Donner PUD, Main

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.

MORE ABOUT THIS CONTAMINANT

 

29

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.0880 ppm51ND - 0.440 ppm
2015N/A00N/A
20160.150 ppm143ND - 1.20 ppm
2017N/A00N/A
2018N/A00N/A
20190.122 ppm102ND - 0.710 ppm

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
2014-01-299590-027-0910ND
2014-09-089590-012-08150.440 ppm
2014-09-089590-007-0843ND
2014-09-089590-006-0805ND
2014-09-089590-005-0855ND
2016-05-129590-010-10101.20 ppm
2016-05-129590-029-0900ND
2016-05-129590-019-0910ND
2016-06-219590-001-1430ND
2016-06-229590-005-1430ND
2016-06-239590-019-1420ND
2016-06-289590-007-1430ND
2016-07-069590-027-1400ND
2016-07-189590-025-1430ND
2016-07-199590-023-1430ND
2016-07-259590-006-14300.450 ppm
2016-09-139590-021-1430ND
2016-09-219590-012-14300.450 ppm
2016-09-289590-029-1430ND
2019-06-129590-007-0730ND
2019-06-129590-006-10000.510 ppm
2019-06-129590-005-0800ND
2019-06-179590-027-0830ND
2019-06-179590-019-0730ND
2019-06-249590-021-0900ND
2019-06-249590-029-0800ND
2019-07-099590-025-1145ND
2019-07-109590-023-1130ND
2019-07-119590-012-08300.710 ppm