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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Peabody Water Department (MWRA)

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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595

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0800 ppm31ND - 0.240 ppm
20150.0499 ppm12081ND - 0.330 ppm
20160.0633 ppm11364ND - 0.330 ppm
20170.0662 ppm11562ND - 0.440 ppm
20180.0834 ppm11491ND - 0.520 ppm
20190.0546 ppm13071ND - 0.360 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
2014-01-30ND
2014-01-300.240 ppm
2014-01-30ND
2015-01-260.00730 ppm
2015-01-26ND
2015-01-260.00680 ppm
2015-01-260.0110 ppm
2015-01-26ND
2015-01-260.00570 ppm
2015-01-26ND
2015-02-090.00650 ppm
2015-02-090.00720 ppm
2015-02-090.0110 ppm
2015-02-09ND
2015-02-18ND
2015-02-180.00580 ppm
2015-02-180.00740 ppm
2015-03-090.00730 ppm
2015-03-09ND
2015-03-09ND
2015-03-090.00700 ppm
2015-03-09ND
2015-03-09ND
2015-03-09ND
2015-04-060.00630 ppm
2015-04-06ND
2015-04-06ND
2015-04-060.00660 ppm
2015-04-060.00940 ppm
2015-04-060.00550 ppm
2015-04-06ND
2015-05-04ND
2015-05-04ND
2015-05-04ND
2015-05-04ND
2015-05-04ND
2015-05-040.00790 ppm
2015-05-04ND
2015-06-080.00540 ppm
2015-06-08ND
2015-06-080.00570 ppm
2015-06-080.00550 ppm
2015-06-08ND
2015-06-080.00630 ppm
2015-06-08ND
2015-06-150.0170 ppm
2015-06-15ND
2015-06-15ND
2015-06-150.00910 ppm
2015-06-15ND
2015-06-150.00920 ppm
2015-06-150.01000 ppm
2015-06-290.00690 ppm
2015-06-29ND
2015-06-290.00590 ppm
2015-06-290.00660 ppm
2015-06-29ND
2015-06-290.00750 ppm
2015-06-29ND
2015-07-130.0140 ppm
2015-07-13ND
2015-07-130.0110 ppm
2015-07-130.0130 ppm
2015-07-130.0140 ppm
2015-07-130.0140 ppm
2015-07-130.00630 ppm
2015-07-270.0280 ppm
2015-07-270.00730 ppm
2015-07-27ND
2015-07-270.0160 ppm
2015-07-270.0290 ppm
2015-07-270.00790 ppm
2015-07-270.00750 ppm
2015-07-270.0820 ppm
2015-08-100.210 ppm
2015-08-10ND
2015-08-100.220 ppm
2015-08-100.220 ppm
2015-08-100.0520 ppm
2015-08-100.0220 ppm
2015-08-100.220 ppm
2015-08-240.230 ppm
2015-08-24ND
2015-08-240.120 ppm
2015-08-240.220 ppm
2015-08-240.0800 ppm
2015-08-240.0360 ppm
2015-08-240.240 ppm
2015-09-080.130 ppm
2015-09-08ND
2015-09-080.0220 ppm
2015-09-080.260 ppm
2015-09-080.0630 ppm
2015-09-080.0540 ppm
2015-09-080.250 ppm
2015-09-210.240 ppm
2015-09-21ND
2015-09-210.110 ppm
2015-09-210.260 ppm
2015-09-210.0880 ppm
2015-09-210.0300 ppm
2015-09-210.190 ppm
2015-10-050.200 ppm
2015-10-05ND
2015-10-050.170 ppm
2015-10-050.200 ppm
2015-10-050.120 ppm
2015-10-05ND
2015-10-050.330 ppm
2015-11-020.230 ppm
2015-11-02ND
2015-11-020.180 ppm
2015-11-020.220 ppm
2015-11-020.0350 ppm
2015-11-020.00660 ppm
2015-11-020.190 ppm
2015-12-070.0160 ppm
2015-12-07ND
2015-12-070.0300 ppm
2015-12-070.0160 ppm
2015-12-070.00690 ppm
2015-12-07ND
2015-12-070.0110 ppm
2016-01-040.00540 ppm
2016-01-04ND
2016-01-040.00890 ppm
2016-01-040.00520 ppm
2016-01-040.00890 ppm
2016-01-04ND
2016-01-04ND
2016-01-25ND
2016-01-25ND
2016-02-220.0120 ppm
2016-02-22ND
2016-02-220.00560 ppm
2016-02-220.00740 ppm
2016-02-220.00690 ppm
2016-02-22ND
2016-02-22ND
2016-03-070.00570 ppm
2016-03-07ND
2016-03-07ND
2016-03-070.00570 ppm
2016-03-07ND
2016-03-07ND
2016-03-07ND
2016-04-04ND
2016-04-04ND
2016-04-04ND
2016-04-04ND
2016-04-04ND
2016-04-04ND
2016-04-04ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-06-13ND
2016-06-13ND
2016-06-13ND
2016-06-130.00530 ppm
2016-06-13ND
2016-06-130.00750 ppm
2016-06-13ND
2016-06-270.00590 ppm
2016-06-27ND
2016-06-27ND
2016-06-270.00800 ppm
2016-06-27ND
2016-06-270.00810 ppm
2016-06-270.00600 ppm
2016-07-110.0130 ppm
2016-07-11ND
2016-07-110.0120 ppm
2016-07-11ND
2016-07-110.00980 ppm
2016-07-110.120 ppm
2016-07-250.0640 ppm
2016-07-25ND
2016-07-250.0980 ppm
2016-07-250.0660 ppm
2016-07-250.0360 ppm
2016-07-250.0240 ppm
2016-07-250.120 ppm
2016-08-080.310 ppm
2016-08-08ND
2016-08-080.210 ppm
2016-08-080.300 ppm
2016-08-080.0640 ppm
2016-08-080.0960 ppm
2016-08-080.260 ppm
2016-08-22ND
2016-08-22ND
2016-08-220.0580 ppm
2016-08-22ND
2016-08-220.110 ppm
2016-08-220.0280 ppm
2016-08-220.220 ppm
2016-09-120.180 ppm
2016-09-12ND
2016-09-120.310 ppm
2016-09-120.180 ppm
2016-09-120.150 ppm
2016-09-120.0820 ppm
2016-09-120.170 ppm
2016-09-260.190 ppm
2016-09-26ND
2016-09-260.310 ppm
2016-09-260.180 ppm
2016-09-260.150 ppm
2016-09-260.130 ppm
2016-09-260.330 ppm
2016-10-170.300 ppm
2016-10-17ND
2016-10-170.1000 ppm
2016-10-170.310 ppm
2016-10-170.0650 ppm
2016-10-170.0280 ppm
2016-10-170.310 ppm
2016-11-070.240 ppm
2016-11-07ND
2016-11-070.220 ppm
2016-11-070.240 ppm
2016-11-070.0320 ppm
2016-11-070.0180 ppm
2016-11-070.160 ppm
2016-12-050.150 ppm
2016-12-05ND
2016-12-050.130 ppm
2016-12-050.150 ppm
2016-12-05ND
2016-12-05ND
2016-12-050.0110 ppm
2017-01-09ND
2017-01-09ND
2017-01-090.01000 ppm
2017-01-090.0140 ppm
2017-01-09ND
2017-01-09ND
2017-01-09ND
2017-01-30ND
2017-01-30ND
2017-01-30ND
2017-02-060.00720 ppm
2017-02-06ND
2017-02-060.00620 ppm
2017-02-060.00960 ppm
2017-02-06ND
2017-02-06ND
2017-02-06ND
2017-03-060.00550 ppm
2017-03-06ND
2017-03-06ND
2017-03-06ND
2017-03-06ND
2017-03-06ND
2017-03-06ND
2017-04-030.00660 ppm
2017-04-03ND
2017-04-030.00630 ppm
2017-04-030.00730 ppm
2017-04-03ND
2017-04-030.00650 ppm
2017-04-03ND
2017-05-01ND
2017-05-01ND
2017-05-01ND
2017-05-01ND
2017-05-010.00540 ppm
2017-05-01ND
2017-05-01ND
2017-06-050.00610 ppm
2017-06-05ND
2017-06-05ND
2017-06-050.00580 ppm
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-06-19ND
2017-06-19ND
2017-06-19ND
2017-06-190.00660 ppm
2017-06-190.00580 ppm
2017-06-190.00650 ppm
2017-06-190.00510 ppm
2017-07-050.00820 ppm
2017-07-05ND
2017-07-050.00820 ppm
2017-07-050.00780 ppm
2017-07-05ND
2017-07-050.00610 ppm
2017-07-05ND
2017-07-170.0440 ppm
2017-07-17ND
2017-07-170.150 ppm
2017-07-170.0460 ppm
2017-07-17ND
2017-07-170.0330 ppm
2017-07-17ND
2017-08-070.260 ppm
2017-08-07ND
2017-08-070.430 ppm
2017-08-070.260 ppm
2017-08-07ND
2017-08-070.190 ppm
2017-08-07ND
2017-08-210.0110 ppm
2017-08-210.00620 ppm
2017-08-210.440 ppm
2017-08-210.340 ppm
2017-08-210.00640 ppm
2017-08-210.270 ppm
2017-08-210.0500 ppm
2017-09-110.220 ppm
2017-09-11ND
2017-09-110.440 ppm
2017-09-110.380 ppm
2017-09-11ND
2017-09-110.350 ppm
2017-09-110.0880 ppm
2017-09-250.300 ppm
2017-09-25ND
2017-09-250.300 ppm
2017-09-250.300 ppm
2017-09-25ND
2017-09-250.270 ppm
2017-09-250.110 ppm
2017-10-160.420 ppm
2017-10-16ND
2017-10-160.230 ppm
2017-10-160.430 ppm
2017-10-160.00620 ppm
2017-10-160.0390 ppm
2017-10-160.110 ppm
2017-11-060.0140 ppm
2017-11-060.260 ppm
2017-11-06ND
2017-11-060.290 ppm
2017-11-06ND
2017-11-060.0610 ppm
2017-11-060.0150 ppm
2017-12-040.0590 ppm
2017-12-04ND
2017-12-040.130 ppm
2017-12-040.0580 ppm
2017-12-04ND
2017-12-040.0120 ppm
2017-12-040.0360 ppm
2018-01-080.00530 ppm
2018-01-08ND
2018-01-080.0150 ppm
2018-01-080.00750 ppm
2018-01-080.00710 ppm
2018-01-080.00580 ppm
2018-01-080.00840 ppm
2018-02-050.00850 ppm
2018-02-05ND
2018-02-05ND
2018-02-05ND
2018-02-050.0120 ppm
2018-02-050.00850 ppm
2018-02-05ND
2018-02-050.00820 ppm
2018-02-050.00750 ppm
2018-03-050.00600 ppm
2018-03-05ND
2018-03-050.00580 ppm
2018-03-050.00580 ppm
2018-03-05ND
2018-03-050.00640 ppm
2018-03-05ND
2018-04-020.00770 ppm
2018-04-02ND
2018-04-020.00800 ppm
2018-04-020.00820 ppm
2018-04-020.00680 ppm
2018-04-020.00770 ppm
2018-04-020.00630 ppm
2018-05-070.00750 ppm
2018-05-07ND
2018-05-070.00710 ppm
2018-05-070.00730 ppm
2018-05-070.00960 ppm
2018-05-070.00690 ppm
2018-05-07ND
2018-06-040.0120 ppm
2018-06-04ND
2018-06-040.00680 ppm
2018-06-040.00960 ppm
2018-06-04ND
2018-06-040.00590 ppm
2018-06-04ND
2018-06-180.0120 ppm
2018-06-18ND
2018-06-180.0120 ppm
2018-06-180.0110 ppm
2018-06-18ND
2018-06-180.00880 ppm
2018-06-180.00810 ppm
2018-07-020.0150 ppm
2018-07-02ND
2018-07-020.0210 ppm
2018-07-020.0140 ppm
2018-07-02ND
2018-07-020.00640 ppm
2018-07-020.0170 ppm
2018-07-16ND
2018-07-16ND
2018-07-160.0300 ppm
2018-07-160.0110 ppm
2018-07-160.00780 ppm
2018-07-160.00600 ppm
2018-07-160.140 ppm
2018-08-060.400 ppm
2018-08-060.130 ppm
2018-08-060.460 ppm
2018-08-060.400 ppm
2018-08-060.0180 ppm
2018-08-060.180 ppm
2018-08-060.150 ppm
2018-08-200.380 ppm
2018-08-200.190 ppm
2018-08-200.220 ppm
2018-08-200.370 ppm
2018-08-200.0230 ppm
2018-08-200.360 ppm
2018-08-200.110 ppm
2018-09-100.480 ppm
2018-09-100.160 ppm
2018-09-100.410 ppm
2018-09-100.490 ppm
2018-09-100.0110 ppm
2018-09-100.0190 ppm
2018-09-100.210 ppm
2018-09-240.520 ppm
2018-09-240.0550 ppm
2018-09-240.400 ppm
2018-09-240.520 ppm
2018-09-240.0280 ppm
2018-09-24ND
2018-09-240.00790 ppm
2018-10-150.0640 ppm
2018-10-150.180 ppm
2018-10-150.240 ppm
2018-10-150.280 ppm
2018-10-150.0230 ppm
2018-10-150.0160 ppm
2018-10-150.120 ppm
2018-11-050.260 ppm
2018-11-050.120 ppm
2018-11-050.180 ppm
2018-11-050.260 ppm
2018-11-050.0200 ppm
2018-11-050.0220 ppm
2018-11-050.0290 ppm
2018-12-030.140 ppm
2018-12-030.0450 ppm
2018-12-030.0150 ppm
2018-12-030.160 ppm
2018-12-03ND
2018-12-030.0790 ppm
2018-12-03ND
2019-01-07ND
2019-01-070.00530 ppm
2019-01-070.0200 ppm
2019-01-070.0120 ppm
2019-01-07ND
2019-01-07ND
2019-01-07ND
2019-02-110.00520 ppm
2019-02-11ND
2019-02-110.00630 ppm
2019-02-11ND
2019-02-11ND
2019-02-11ND
2019-02-11ND
2019-02-21ND
2019-02-21ND
2019-03-07ND
2019-03-110.00580 ppm
2019-03-11ND
2019-03-11ND
2019-03-11ND
2019-03-11ND
2019-03-11ND
2019-03-11ND
2019-04-010.0110 ppm
2019-04-01ND
2019-04-010.00870 ppm
2019-04-010.00710 ppm
2019-04-010.0120 ppm
2019-04-010.00520 ppm
2019-04-01ND
2019-04-01ND
2019-04-24ND
2019-05-06ND
2019-05-06ND
2019-05-06ND
2019-05-06ND
2019-05-060.00510 ppm
2019-05-060.00700 ppm
2019-05-06ND
2019-05-06ND
2019-05-06ND
2019-06-030.00680 ppm
2019-06-03ND
2019-06-030.00610 ppm
2019-06-03ND
2019-06-030.00600 ppm
2019-06-03ND
2019-06-03ND
2019-06-03ND
2019-06-170.00520 ppm
2019-06-17ND
2019-06-170.00540 ppm
2019-06-17ND
2019-06-170.00700 ppm
2019-06-17ND
2019-06-17ND
2019-06-17ND
2019-07-01ND
2019-07-01ND
2019-07-01ND
2019-07-01ND
2019-07-01ND
2019-07-01ND
2019-07-01ND
2019-07-01ND
2019-07-15ND
2019-07-15ND
2019-07-15ND
2019-07-150.00640 ppm
2019-07-150.0120 ppm
2019-07-15ND
2019-07-15ND
2019-07-15ND
2019-08-050.120 ppm
2019-08-050.0580 ppm
2019-08-050.0120 ppm
2019-08-050.120 ppm
2019-08-050.0190 ppm
2019-08-050.00730 ppm
2019-08-050.0150 ppm
2019-08-05ND
2019-08-190.200 ppm
2019-08-190.300 ppm
2019-08-190.0540 ppm
2019-08-190.180 ppm
2019-08-190.0130 ppm
2019-08-190.0120 ppm
2019-08-190.140 ppm
2019-08-190.0440 ppm
2019-09-090.260 ppm
2019-09-090.210 ppm
2019-09-090.200 ppm
2019-09-090.290 ppm
2019-09-090.0120 ppm
2019-09-090.0490 ppm
2019-09-09ND
2019-09-090.230 ppm
2019-09-230.270 ppm
2019-09-230.160 ppm
2019-09-230.140 ppm
2019-09-230.270 ppm
2019-09-230.00750 ppm
2019-09-230.180 ppm
2019-09-230.180 ppm
2019-09-230.150 ppm
2019-10-070.0140 ppm
2019-10-070.170 ppm
2019-10-070.220 ppm
2019-10-070.240 ppm
2019-10-07ND
2019-10-070.180 ppm
2019-10-070.110 ppm
2019-10-070.0120 ppm
2019-11-040.330 ppm
2019-11-040.160 ppm
2019-11-040.360 ppm
2019-11-040.350 ppm
2019-11-040.0200 ppm
2019-11-040.320 ppm
2019-11-040.210 ppm
2019-11-04ND
2019-12-09ND
2019-12-090.0120 ppm
2019-12-090.170 ppm
2019-12-090.0730 ppm
2019-12-090.00940 ppm
2019-12-090.0190 ppm
2019-12-090.0440 ppm
2019-12-09ND