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EWG's Tap Water Database — 2019 UPDATE

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Nitrate

Cross Valley Water District

Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

 

48

Samples

0

Samples exceeding legal limit (MCL)

35

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.959 ppm1610ND - 3.51 ppm
20131.45 ppm108ND - 3.60 ppm
20141.33 ppm65ND - 3.48 ppm
20151.18 ppm64ND - 3.68 ppm
20161.41 ppm54ND - 3.29 ppm
20171.35 ppm54ND - 3.34 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The EWG Health Guideline of 0.14 ppm for nitrate was defined by EWG . This health guideline protects against cancer and harm to fetal growth and development.

EPA Maximum Contaminant
Level (MCL) 10 ppm

The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppm = parts per million

All test results

Date Lab ID Result
2012-06-01203653.41 ppm
2012-06-0120366ND
2012-06-01203670.790 ppm
2012-06-01203680.540 ppm
2012-06-01203691.82 ppm
2012-12-1149247ND
2012-12-11492463.51 ppm
2012-12-11492452.65 ppm
2012-12-11492440.210 ppm
2012-12-11492481.07 ppm
2012-12-11492490.550 ppm
2012-12-1149250ND
2012-12-11492430.800 ppm
2012-12-1149252ND
2012-12-1149251ND
2012-12-1149253ND
2013-07-02268810.550 ppm
2013-07-02268830.860 ppm
2013-07-02268802.12 ppm
2013-07-02268843.52 ppm
2013-07-0226882ND
2013-12-10531222.40 ppm
2013-12-10531213.60 ppm
2013-12-1053120ND
2013-12-10531190.590 ppm
2013-12-10531230.830 ppm
2014-10-07452832.11 ppm
2014-10-07452843.48 ppm
2014-10-07452850.770 ppm
2014-10-07452860.610 ppm
2014-10-0745289ND
2014-10-14462790.990 ppm
2015-07-2211535ND
2015-10-06488543.68 ppm
2015-10-06488570.670 ppm
2015-10-0648856ND
2015-10-06488552.04 ppm
2015-10-06488530.660 ppm
2016-10-03ND
2016-10-032.29 ppm
2016-10-033.29 ppm
2016-10-030.730 ppm
2016-10-030.730 ppm
2017-10-020.670 ppm
2017-10-020.660 ppm
2017-10-022.07 ppm
2017-10-02ND
2017-12-133.34 ppm