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EWG's Tap Water Database — 2019 UPDATE

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Nitrite

Combine Water Supply Corporation

NOTE: Combine Water Supply Corporation purchases water from City of Seagoville which is required to test for nitrite. Sample information shown below was taken by City of Seagoville.

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.

 

3

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.145 ppm110.145 ppm
2013N/A00N/A
20140.544 ppm110.544 ppm
20150.122 ppm42ND - 0.306 ppm
20160.0936 ppm43ND - 0.186 ppm
20170.0875 ppm440.0101 ppm - 0.261 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 1 ppm

The legal limit for nitrite, established in 1991, was based on the rate of conversion of ingested nitrate into nitrite in adults. This limit may not fully protect against the risk of cancer due to nitrite exposure.

ppm = parts per million

All test results

NOTE: Combine Water Supply Corporation purchases water from City of Seagoville which is required to test for nitrite. Sample information shown below was taken by City of Seagoville.

Date Lab ID Result
2012-02-211202586001ND
2014-10-28Q1454438003ND
2015-01-27Q1503147001ND