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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Southbridge Water Department

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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562

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.00179 ppm244ND - 0.0160 ppm
20150.00176 ppm14521ND - 0.0200 ppm
20160.00475 ppm14447ND - 0.0570 ppm
20170.00340 ppm14539ND - 0.0320 ppm
20180.00442 ppm5522ND - 0.0260 ppm
20190.00145 ppm498ND - 0.0120 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 Result
2014-01-07ND
2014-01-21ND
2014-02-04ND
2014-02-18ND
2014-03-04ND
2014-03-18ND
2014-04-01ND
2014-04-15ND
2014-05-06ND
2014-05-20ND
2014-06-030.0160 ppm
2014-06-170.01000 ppm
2014-07-010.00900 ppm
2014-07-150.00800 ppm
2014-08-05ND
2014-08-19ND
2014-09-02ND
2014-09-16ND
2014-10-07ND
2014-10-21ND
2014-11-04ND
2014-11-18ND
2014-12-02ND
2014-12-16ND
2015-01-06ND
2015-01-06ND
2015-01-06ND
2015-01-06ND
2015-01-060.00700 ppm
2015-01-06ND
2015-01-20ND
2015-01-20ND
2015-01-20ND
2015-01-20ND
2015-01-200.0110 ppm
2015-01-20ND
2015-02-03ND
2015-02-03ND
2015-02-03ND
2015-02-03ND
2015-02-030.00800 ppm
2015-02-03ND
2015-02-17ND
2015-02-17ND
2015-02-17ND
2015-02-17ND
2015-02-170.00800 ppm
2015-02-17ND
2015-03-03ND
2015-03-03ND
2015-03-03ND
2015-03-03ND
2015-03-03ND
2015-03-03ND
2015-03-17ND
2015-03-17ND
2015-03-17ND
2015-03-17ND
2015-03-170.00700 ppm
2015-03-17ND
2015-04-07ND
2015-04-07ND
2015-04-07ND
2015-04-07ND
2015-04-07ND
2015-04-07ND
2015-04-07ND
2015-04-21ND
2015-04-21ND
2015-04-21ND
2015-04-21ND
2015-04-21ND
2015-04-21ND
2015-05-05ND
2015-05-05ND
2015-05-05ND
2015-05-050.01000 ppm
2015-05-05ND
2015-05-05ND
2015-05-19ND
2015-05-19ND
2015-05-19ND
2015-05-19ND
2015-05-190.0150 ppm
2015-05-19ND
2015-06-02ND
2015-06-02ND
2015-06-02ND
2015-06-02ND
2015-06-020.0150 ppm
2015-06-02ND
2015-06-16ND
2015-06-16ND
2015-06-16ND
2015-06-16ND
2015-06-160.00900 ppm
2015-06-16ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-07-070.00900 ppm
2015-07-07ND
2015-07-21ND
2015-07-21ND
2015-07-21ND
2015-07-21ND
2015-07-210.00700 ppm
2015-07-21ND
2015-08-04ND
2015-08-04ND
2015-08-04ND
2015-08-04ND
2015-08-04ND
2015-08-04ND
2015-08-18ND
2015-08-18ND
2015-08-18ND
2015-08-18ND
2015-08-180.0140 ppm
2015-08-18ND
2015-09-01ND
2015-09-01ND
2015-09-01ND
2015-09-01ND
2015-09-010.0200 ppm
2015-09-01ND
2015-09-15ND
2015-09-15ND
2015-09-15ND
2015-09-15ND
2015-09-150.0130 ppm
2015-09-15ND
2015-10-06ND
2015-10-06ND
2015-10-06ND
2015-10-06ND
2015-10-060.0130 ppm
2015-10-06ND
2015-10-20ND
2015-10-20ND
2015-10-200.00900 ppm
2015-10-20ND
2015-10-200.0180 ppm
2015-10-20ND
2015-11-03ND
2015-11-03ND
2015-11-03ND
2015-11-03ND
2015-11-030.0200 ppm
2015-11-03ND
2015-11-17ND
2015-11-17ND
2015-11-17ND
2015-11-17ND
2015-11-170.0120 ppm
2015-11-17ND
2015-12-01ND
2015-12-01ND
2015-12-01ND
2015-12-01ND
2015-12-010.0110 ppm
2015-12-01ND
2015-12-15ND
2015-12-15ND
2015-12-15ND
2015-12-15ND
2015-12-150.0190 ppm
2015-12-15ND
2016-01-05ND
2016-01-05ND
2016-01-05ND
2016-01-05ND
2016-01-050.00700 ppm
2016-01-05ND
2016-01-19ND
2016-01-19ND
2016-01-19ND
2016-01-19ND
2016-01-190.00900 ppm
2016-01-19ND
2016-02-02ND
2016-02-02ND
2016-02-02ND
2016-02-02ND
2016-02-02ND
2016-02-02ND
2016-02-16ND
2016-02-16ND
2016-02-16ND
2016-02-16ND
2016-02-160.00900 ppm
2016-02-16ND
2016-03-01ND
2016-03-01ND
2016-03-01ND
2016-03-010.00700 ppm
2016-03-01ND
2016-03-01ND
2016-03-15ND
2016-03-15ND
2016-03-15ND
2016-03-15ND
2016-03-150.0130 ppm
2016-03-15ND
2016-04-05ND
2016-04-05ND
2016-04-05ND
2016-04-05ND
2016-04-050.0130 ppm
2016-04-05ND
2016-04-19ND
2016-04-19ND
2016-04-19ND
2016-04-19ND
2016-04-190.0130 ppm
2016-04-19ND
2016-05-03ND
2016-05-03ND
2016-05-03ND
2016-05-03ND
2016-05-030.0140 ppm
2016-05-03ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-17ND
2016-05-170.00900 ppm
2016-05-17ND
2016-06-07ND
2016-06-07ND
2016-06-07ND
2016-06-07ND
2016-06-070.0120 ppm
2016-06-07ND
2016-06-21ND
2016-06-21ND
2016-06-210.0110 ppm
2016-06-21ND
2016-06-210.00900 ppm
2016-06-21ND
2016-07-05ND
2016-07-05ND
2016-07-05ND
2016-07-05ND
2016-07-050.0150 ppm
2016-07-05ND
2016-07-19ND
2016-07-19ND
2016-07-19ND
2016-07-19ND
2016-07-190.0120 ppm
2016-07-19ND
2016-08-02ND
2016-08-02ND
2016-08-02ND
2016-08-02ND
2016-08-020.0120 ppm
2016-08-02ND
2016-08-16ND
2016-08-16ND
2016-08-16ND
2016-08-16ND
2016-08-160.00900 ppm
2016-08-16ND
2016-09-060.0120 ppm
2016-09-06ND
2016-09-060.00900 ppm
2016-09-06ND
2016-09-060.0200 ppm
2016-09-06ND
2016-09-200.00700 ppm
2016-09-20ND
2016-09-200.0110 ppm
2016-09-20ND
2016-09-200.0220 ppm
2016-09-20ND
2016-10-040.00900 ppm
2016-10-04ND
2016-10-040.0130 ppm
2016-10-04ND
2016-10-040.0180 ppm
2016-10-04ND
2016-10-180.00700 ppm
2016-10-18ND
2016-10-180.00700 ppm
2016-10-18ND
2016-10-180.0210 ppm
2016-10-18ND
2016-11-010.0220 ppm
2016-11-010.0120 ppm
2016-11-010.0200 ppm
2016-11-01ND
2016-11-010.0450 ppm
2016-11-010.00700 ppm
2016-11-150.0180 ppm
2016-11-150.00800 ppm
2016-11-150.0250 ppm
2016-11-150.0140 ppm
2016-11-150.0570 ppm
2016-11-150.00800 ppm
2016-12-060.00900 ppm
2016-12-06ND
2016-12-060.01000 ppm
2016-12-06ND
2016-12-060.0300 ppm
2016-12-06ND
2016-12-200.0160 ppm
2016-12-200.00700 ppm
2016-12-200.0120 ppm
2016-12-20ND
2016-12-200.0250 ppm
2016-12-200.00900 ppm
2017-01-030.0160 ppm
2017-01-03ND
2017-01-030.0130 ppm
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-01-17ND
2017-01-17ND
2017-01-170.00700 ppm
2017-01-17ND
2017-01-170.0150 ppm
2017-01-17ND
2017-02-070.00800 ppm
2017-02-07ND
2017-02-070.00900 ppm
2017-02-07ND
2017-02-070.0160 ppm
2017-02-07ND
2017-02-21ND
2017-02-21ND
2017-02-210.00700 ppm
2017-02-21ND
2017-02-210.0170 ppm
2017-02-21ND
2017-03-07ND
2017-03-07ND
2017-03-07ND
2017-03-07ND
2017-03-070.00900 ppm
2017-03-07ND
2017-03-21ND
2017-03-21ND
2017-03-21ND
2017-03-21ND
2017-03-210.0110 ppm
2017-03-21ND
2017-04-040.01000 ppm
2017-04-04ND
2017-04-040.01000 ppm
2017-04-04ND
2017-04-040.0190 ppm
2017-04-04ND
2017-04-180.00700 ppm
2017-04-18ND
2017-04-180.00700 ppm
2017-04-18ND
2017-04-180.0170 ppm
2017-04-18ND
2017-05-02ND
2017-05-02ND
2017-05-02ND
2017-05-02ND
2017-05-020.0110 ppm
2017-05-02ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-160.0150 ppm
2017-05-16ND
2017-06-060.00700 ppm
2017-06-06ND
2017-06-06ND
2017-06-06ND
2017-06-060.0130 ppm
2017-06-06ND
2017-06-200.0110 ppm
2017-06-20ND
2017-06-200.0190 ppm
2017-06-20ND
2017-06-200.0190 ppm
2017-06-200.00900 ppm
2017-07-11ND
2017-07-11ND
2017-07-110.00800 ppm
2017-07-11ND
2017-07-11ND
2017-07-11ND
2017-07-18ND
2017-07-18ND
2017-07-18ND
2017-07-18ND
2017-07-180.0150 ppm
2017-07-18ND
2017-08-01ND
2017-08-01ND
2017-08-01ND
2017-08-01ND
2017-08-010.0160 ppm
2017-08-01ND
2017-08-15ND
2017-08-15ND
2017-08-150.00700 ppm
2017-08-15ND
2017-08-150.0160 ppm
2017-08-15ND
2017-09-050.01000 ppm
2017-09-05ND
2017-09-050.00900 ppm
2017-09-05ND
2017-09-050.01000 ppm
2017-09-05ND
2017-09-12ND
2017-09-19ND
2017-09-19ND
2017-09-190.0110 ppm
2017-09-19ND
2017-09-190.0140 ppm
2017-09-19ND
2017-10-03ND
2017-10-03ND
2017-10-03ND
2017-10-03ND
2017-10-030.0320 ppm
2017-10-03ND
2017-10-170.00700 ppm
2017-10-17ND
2017-10-170.00800 ppm
2017-10-17ND
2017-10-170.0280 ppm
2017-10-17ND
2017-11-07ND
2017-11-07ND
2017-11-07ND
2017-11-07ND
2017-11-07ND
2017-11-07ND
2017-11-20ND
2017-11-20ND
2017-11-20ND
2017-11-20ND
2017-11-20ND
2017-11-20ND
2017-12-05ND
2017-12-05ND
2017-12-05ND
2017-12-05ND
2017-12-05ND
2017-12-05ND
2017-12-19ND
2017-12-19ND
2017-12-19ND
2017-12-19ND
2017-12-19ND
2017-12-19ND
2018-04-03ND
2018-06-120.01000 ppm
2018-06-12ND
2018-06-120.00800 ppm
2018-06-12ND
2018-06-120.0140 ppm
2018-06-12ND
2018-07-100.0120 ppm
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-170.00700 ppm
2018-07-17ND
2018-07-170.00800 ppm
2018-07-17ND
2018-07-170.0130 ppm
2018-07-17ND
2018-08-07ND
2018-08-07ND
2018-08-07ND
2018-08-07ND
2018-08-070.0170 ppm
2018-08-07ND
2018-08-210.01000 ppm
2018-08-21ND
2018-08-210.0130 ppm
2018-08-210.01000 ppm
2018-08-210.0260 ppm
2018-08-210.00800 ppm
2018-09-04ND
2018-09-04ND
2018-09-04ND
2018-09-040.00700 ppm
2018-09-040.0120 ppm
2018-09-04ND
2018-09-180.00900 ppm
2018-09-18ND
2018-09-18ND
2018-09-18ND
2018-09-180.00700 ppm
2018-09-18ND
2018-10-02ND
2018-10-020.00900 ppm
2018-10-020.01000 ppm
2018-10-02ND
2018-10-020.0110 ppm
2018-10-02ND
2018-10-16ND
2018-10-16ND
2018-10-160.01000 ppm
2018-10-16ND
2018-10-160.0120 ppm
2018-10-16ND
2019-04-02ND
2019-06-11ND
2019-06-11ND
2019-06-110.01000 ppm
2019-06-11ND
2019-06-110.0120 ppm
2019-06-11ND
2019-07-23ND
2019-07-23ND
2019-07-23ND
2019-07-23ND
2019-07-230.00700 ppm
2019-07-23ND
2019-08-13ND
2019-08-13ND
2019-08-13ND
2019-08-13ND
2019-08-130.01000 ppm
2019-08-13ND
2019-08-20ND
2019-08-20ND
2019-08-20ND
2019-08-20ND
2019-08-20ND
2019-08-20ND
2019-09-030.00700 ppm
2019-09-03ND
2019-09-030.00700 ppm
2019-09-03ND
2019-09-030.00700 ppm
2019-09-03ND
2019-09-17ND
2019-09-17ND
2019-09-17ND
2019-09-17ND
2019-09-17ND
2019-09-17ND
2019-10-01ND
2019-10-01ND
2019-10-01ND
2019-10-01ND
2019-10-010.0110 ppm
2019-10-01ND
2019-10-15ND
2019-10-15ND
2019-10-15ND
2019-10-15ND
2019-10-15ND
2019-10-15ND