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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

Lacey Water Department

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.

MORE ABOUT THIS CONTAMINANT

 

105

Samples

0

Samples exceeding legal limit (MCL)

73

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.53 ppm1610ND - 4.44 ppm
20151.67 ppm2013ND - 4.80 ppm
20161.56 ppm1611ND - 6.20 ppm
20171.58 ppm1712ND - 5.70 ppm
20181.88 ppm1914ND - 5.40 ppm
20191.83 ppm1713ND - 4.20 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
2014-05-22114674.44 ppm
2014-06-2611873ND
2014-10-15135012.78 ppm
2014-10-15135282.54 ppm
2014-10-1513529ND
2014-10-15135302.79 ppm
2014-10-15135321.55 ppm
2014-10-15135330.864 ppm
2014-10-1513534ND
2014-10-1613563ND
2014-10-16135641.19 ppm
2014-10-1613565ND
2014-10-16135662.85 ppm
2014-10-1613567ND
2014-10-16135682.83 ppm
2014-10-16135692.62 ppm
2015-02-2615433ND
2015-02-2615433ND
2015-05-13165994.80 ppm
2015-05-13166004.80 ppm
2015-07-1317478ND
2015-09-16185861.07 ppm
2015-09-16185872.75 ppm
2015-09-16185880.874 ppm
2015-09-16185850.680 ppm
2015-09-1618589ND
2015-09-1658569ND
2015-09-16585682.80 ppm
2015-09-16585672.90 ppm
2015-09-28187464.20 ppm
2015-11-0219386ND
2015-11-0219385ND
2015-11-02193832.70 ppm
2015-11-02193871.50 ppm
2015-11-02193841.60 ppm
2015-11-03194232.80 ppm
2016-04-136.20 ppm
2016-08-25ND
2016-08-25ND
2016-08-252.80 ppm
2016-08-301.40 ppm
2016-08-302.70 ppm
2016-09-011.10 ppm
2016-09-010.510 ppm
2016-09-010.840 ppm
2016-09-011.40 ppm
2016-09-29ND
2016-09-29ND
2016-09-292.70 ppm
2016-09-29ND
2016-09-292.60 ppm
2016-09-292.70 ppm
2017-05-103.10 ppm
2017-05-10ND
2017-05-105.70 ppm
2017-05-101.50 ppm
2017-05-10ND
2017-05-10ND
2017-05-101.40 ppm
2017-05-101.70 ppm
2017-05-103.20 ppm
2017-05-103.20 ppm
2017-05-103.10 ppm
2017-05-171.000 ppm
2017-05-180.400 ppm
2017-05-180.200 ppm
2017-10-12ND
2017-10-12ND
2017-10-232.30 ppm
2018-04-111.40 ppm
2018-04-11ND
2018-04-11ND
2018-04-111.10 ppm
2018-04-111.80 ppm
2018-04-110.500 ppm
2018-04-110.300 ppm
2018-04-113.30 ppm
2018-04-123.30 ppm
2018-05-212.90 ppm
2018-05-212.90 ppm
2018-05-213.20 ppm
2018-05-213.20 ppm
2018-05-213.20 ppm
2018-05-213.30 ppm
2018-05-215.40 ppm
2018-10-22ND
2018-10-22ND
2018-10-22ND
2019-04-290.600 ppm
2019-04-290.500 ppm
2019-04-29ND
2019-04-291.50 ppm
2019-04-293.50 ppm
2019-04-29ND
2019-04-293.40 ppm
2019-04-292.00 ppm
2019-05-064.20 ppm
2019-05-06ND
2019-05-06ND
2019-05-063.30 ppm
2019-05-073.50 ppm
2019-07-013.10 ppm
2019-09-181.40 ppm
2019-11-053.90 ppm
2019-11-070.270 ppm