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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Schaller Water Supply

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.

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99

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.316 ppm2523ND - 1.000 ppm
20150.308 ppm2523ND - 0.600 ppm
20160.0875 ppm248ND - 0.500 ppm
20170.0667 ppm125ND - 0.200 ppm
20180.0571 ppm72ND - 0.200 ppm
20190.158 ppm64ND - 0.290 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

Date Lab ID Result
2014-01-132027853ND
2014-01-1320278521.000 ppm
2014-01-1320278510.1000 ppm
2014-02-1320327630.200 ppm
2014-02-2420353520.200 ppm
2014-03-0620369510.400 ppm
2014-03-0620369500.300 ppm
2014-04-0720435950.200 ppm
2014-04-0720435960.1000 ppm
2014-05-1920512380.1000 ppm
2014-05-1920512370.200 ppm
2014-06-122055544ND
2014-06-1220555450.300 ppm
2014-07-1420625120.500 ppm
2014-07-1420625130.1000 ppm
2014-08-1820712380.1000 ppm
2014-08-2120712440.600 ppm
2014-09-0820763480.700 ppm
2014-09-0820763490.400 ppm
2014-10-0920832470.200 ppm
2014-10-0920832480.800 ppm
2014-11-2020921380.200 ppm
2014-11-2520928330.490 ppm
2014-12-0820959930.200 ppm
2014-12-0820959940.500 ppm
2015-01-195187760.200 ppm
2015-01-195187750.600 ppm
2015-02-165204030.500 ppm
2015-02-165204020.300 ppm
2015-03-125218580.260 ppm
2015-03-125218590.540 ppm
2015-04-095236040.400 ppm
2015-04-095236030.200 ppm
2015-05-115255510.400 ppm
2015-05-115255500.200 ppm
2015-06-085274250.200 ppm
2015-06-115277690.600 ppm
2015-06-115277700.200 ppm
2015-07-205298400.200 ppm
2015-07-205298390.600 ppm
2015-08-135316060.1000 ppm
2015-08-175317350.400 ppm
2015-09-105335190.500 ppm
2015-09-105335180.200 ppm
2015-10-055348520.500 ppm
2015-10-05534851ND
2015-11-16537484ND
2015-11-165374830.300 ppm
2015-12-105389590.200 ppm
2015-12-105389580.1000 ppm
2016-01-145408400.200 ppm
2016-01-14540839ND
2016-02-185430960.1000 ppm
2016-02-185430970.200 ppm
2016-03-07544016ND
2016-03-075440150.1000 ppm
2016-04-115462980.300 ppm
2016-04-11546299ND
2016-05-195491460.300 ppm
2016-05-19549147ND
2016-06-09550598ND
2016-06-095505990.400 ppm
2016-07-075522390.500 ppm
2016-07-07552240ND
2016-08-15554918ND
2016-08-18555218ND
2016-09-12556515ND
2016-09-12556516ND
2016-10-03558046ND
2016-10-03558045ND
2016-11-21561546ND
2016-11-21561545ND
2016-12-15563079ND
2016-12-15563078ND
2017-01-18564771ND
2017-01-185647700.1000 ppm
2017-02-13566250ND
2017-02-13566249ND
2017-03-095678490.200 ppm
2017-03-09567848ND
2017-04-03569263ND
2017-04-035692620.200 ppm
2017-07-105735860.200 ppm
2017-07-105735850.1000 ppm
2017-10-09578018ND
2017-10-09578017ND
2018-01-18582052ND
2018-01-18582051ND
2018-04-125848930.200 ppm
2018-04-12584894ND
2018-05-10586057ND
2018-07-16589162ND
2018-07-165891630.200 ppm
2019-04-11OE7932670.290 ppm
2019-05-20OE8107190.130 ppm
2019-07-15OE835145ND
2019-07-15OE8351460.240 ppm
2019-10-07OE8762390.290 ppm
2019-10-07OE876238ND