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EWG's Tap Water Database — 2021 UPDATE

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Nitrate and nitrite

City of Alexandria Water System

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

MORE ABOUT THIS CONTAMINANT

 

234

Samples

0

Samples exceeding legal limit (MCL)

20

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
20150.0734 ppm1614ND - 0.150 ppm
20160.0485 ppm7242ND - 0.310 ppm
20170.0233 ppm268ND - 0.200 ppm
20180.0294 ppm144ND - 0.170 ppm
20190.0418 ppm9040ND - 0.230 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.

EPA Maximum Contaminant
Level (MCL) 10 ppm

ppm = parts per million

All test results

Date Lab ID Result
2014-02-05AD88953ND
2014-02-05AD88954ND
2014-02-05AD88955ND
2014-02-05AD88956ND
2014-02-05AD88957ND
2014-02-05AD88958ND
2014-02-05AD88959ND
2014-02-05AD88953ND
2014-02-05AD88954ND
2014-02-05AD88955ND
2014-02-05AD88956ND
2014-02-05AD88957ND
2014-02-05AD88958ND
2014-02-05AD88959ND
2014-02-26AD89697ND
2014-02-26AD89697ND
2015-10-21352140250010.0780 ppm
2015-10-21352140250020.0330 ppm
2015-10-21352140250010.0780 ppm
2015-10-21352140250020.0330 ppm
2015-10-22352140250170.150 ppm
2015-10-2235214025018ND
2015-10-22352140250190.150 ppm
2015-10-22352140250200.0260 ppm
2015-10-22352140250170.150 ppm
2015-10-2235214025018ND
2015-10-22352140250190.150 ppm
2015-10-22352140250200.0260 ppm
2015-11-04352152080180.0820 ppm
2015-11-04352152080180.0820 ppm
2015-11-17352177460160.0680 ppm
2015-11-17352177460160.0680 ppm
2016-05-10352444080010.120 ppm
2016-05-10352444080020.0480 ppm
2016-05-1035244408003ND
2016-05-1035244408004ND
2016-05-10352444080050.0810 ppm
2016-05-10352444080010.120 ppm
2016-05-10352444080020.0480 ppm
2016-05-1035244408003ND
2016-05-1035244408004ND
2016-05-10352444080050.0810 ppm
2016-05-1835245776001ND
2016-05-18352457760020.110 ppm
2016-05-18352457760030.0470 ppm
2016-05-1835245776004ND
2016-05-18352457760050.0650 ppm
2016-05-1835245776001ND
2016-05-18352457760020.110 ppm
2016-05-18352457760030.0470 ppm
2016-05-1835245776004ND
2016-05-18352457760050.0650 ppm
2016-05-25352465580010.0800 ppm
2016-05-25352465580020.180 ppm
2016-05-25352465580030.0510 ppm
2016-05-25352465580040.0910 ppm
2016-05-2535246558005ND
2016-05-25352465580010.0800 ppm
2016-05-25352465580020.180 ppm
2016-05-25352465580030.0510 ppm
2016-05-25352465580040.0910 ppm
2016-05-2535246558005ND
2016-06-06352480600010.0430 ppm
2016-06-06352480600020.0450 ppm
2016-06-0635248060003ND
2016-06-06352480600040.310 ppm
2016-06-06352480600050.1000 ppm
2016-06-06352480600010.0430 ppm
2016-06-06352480600020.0450 ppm
2016-06-0635248060003ND
2016-06-06352480600040.310 ppm
2016-06-06352480600050.1000 ppm
2016-06-15352500150010.0250 ppm
2016-06-15352500150020.0270 ppm
2016-06-1535250015003ND
2016-06-15352500150040.0380 ppm
2016-06-15352500150050.120 ppm
2016-06-15352500150010.0250 ppm
2016-06-15352500150020.0270 ppm
2016-06-1535250015003ND
2016-06-15352500150040.0380 ppm
2016-06-15352500150050.120 ppm
2016-07-19352557570010.0360 ppm
2016-07-1935255757002ND
2016-07-19352557570010.0360 ppm
2016-07-1935255757002ND
2016-08-0935259194001ND
2016-08-0935259194002ND
2016-08-09352591940030.0420 ppm
2016-08-0935259194004ND
2016-08-09352591940050.0860 ppm
2016-08-0935259194001ND
2016-08-0935259194002ND
2016-08-09352591940030.0420 ppm
2016-08-0935259194004ND
2016-08-09352591940050.0860 ppm
2016-10-0535271142005ND
2016-10-0535271142005ND
2016-11-0935276653001ND
2016-11-0935276653002ND
2016-11-0935276653001ND
2016-11-0935276653002ND
2016-12-1435283929004ND
2016-12-1435283929004ND
2017-03-0835299871001ND
2017-03-0835299871002ND
2017-03-0835299871001ND
2017-03-0835299871002ND
2017-03-2735303256011ND
2017-03-27353032560120.0390 ppm
2017-03-2735303256011ND
2017-03-27353032560120.0390 ppm
2017-08-0735329426006ND
2017-08-0735329426006ND
2017-10-23353445450110.0320 ppm
2017-10-2335344545012ND
2017-10-2335344545013ND
2017-10-23353445450140.0320 ppm
2017-10-2335344545015ND
2017-10-23353445450160.200 ppm
2017-10-23353445450110.0320 ppm
2017-10-2335344545012ND
2017-10-2335344545013ND
2017-10-23353445450140.0320 ppm
2017-10-2335344545015ND
2017-10-23353445450160.200 ppm
2017-11-0235345825001ND
2017-11-0235345825002ND
2017-11-0235345825001ND
2017-11-0235345825002ND
2018-05-0235389928001ND
2018-05-0235389928002ND
2018-05-0235389928003ND
2018-05-02353899280040.170 ppm
2018-05-02353899280050.0360 ppm
2018-05-0235389928006ND
2018-05-0235389928001ND
2018-05-0235389928002ND
2018-05-0235389928003ND
2018-05-02353899280040.170 ppm
2018-05-02353899280050.0360 ppm
2018-05-0235389928006ND
2018-11-1935432686002ND
2018-11-1935432686002ND
2019-01-30354454700010.0780 ppm
2019-01-30354454700020.0510 ppm
2019-01-30354454700030.0800 ppm
2019-01-30354454700040.0440 ppm
2019-01-30354454700050.0400 ppm
2019-01-30354454700010.0780 ppm
2019-01-30354454700020.0510 ppm
2019-01-30354454700030.0800 ppm
2019-01-30354454700040.0440 ppm
2019-01-30354454700050.0400 ppm
2019-02-06354469870010.0430 ppm
2019-02-06354469870020.0960 ppm
2019-02-06354469870030.0340 ppm
2019-02-06354469870040.0260 ppm
2019-02-06354469870050.0800 ppm
2019-02-06354469870010.0430 ppm
2019-02-06354469870020.0960 ppm
2019-02-06354469870030.0340 ppm
2019-02-06354469870040.0260 ppm
2019-02-06354469870050.0800 ppm
2019-02-2735451250001ND
2019-02-2735451250002ND
2019-02-2735451250003ND
2019-02-2735451250004ND
2019-02-2735451250005ND
2019-02-2735451250001ND
2019-02-2735451250002ND
2019-02-2735451250003ND
2019-02-2735451250004ND
2019-02-2735451250005ND
2019-03-13354546760010.230 ppm
2019-03-13354546760020.110 ppm
2019-03-13354546760030.0680 ppm
2019-03-1335454676004ND
2019-03-13354546760010.230 ppm
2019-03-13354546760020.110 ppm
2019-03-13354546760030.0680 ppm
2019-03-1335454676004ND
2019-03-2035456260001ND
2019-03-2035456260002ND
2019-03-20354562600030.0660 ppm
2019-03-20354562600040.0650 ppm
2019-03-20354562600050.200 ppm
2019-03-2035456260001ND
2019-03-2035456260002ND
2019-03-20354562600030.0660 ppm
2019-03-20354562600040.0650 ppm
2019-03-20354562600050.200 ppm
2019-03-27354576930010.230 ppm
2019-03-27354576930020.0520 ppm
2019-03-2735457693003ND
2019-03-2735457693004ND
2019-03-27354576930050.0860 ppm
2019-03-27354576930010.230 ppm
2019-03-27354576930020.0520 ppm
2019-03-2735457693003ND
2019-03-2735457693004ND
2019-03-27354576930050.0860 ppm
2019-04-1035461050001ND
2019-04-1035461050002ND
2019-04-1035461050003ND
2019-04-1035461050004ND
2019-04-1035461050005ND
2019-04-1035461050001ND
2019-04-1035461050002ND
2019-04-1035461050003ND
2019-04-1035461050004ND
2019-04-1035461050005ND
2019-06-06B1902352-001ND
2019-06-06B1902352-002ND
2019-06-06B1902352-003ND
2019-06-06B1902352-001ND
2019-06-06B1902352-002ND
2019-06-06B1902352-003ND
2019-07-25B1903186-001ND
2019-07-25B1903186-001ND
2019-09-11B1904050-001ND
2019-09-11B1904050-002ND
2019-09-11B1904050-001ND
2019-09-11B1904050-002ND
2019-12-04B1905453-001ND
2019-12-04B1905453-0020.200 ppm
2019-12-04B1905453-003ND
2019-12-04B1905453-004ND
2019-12-04B1905453-005ND
2019-12-04B1905453-001ND
2019-12-04B1905453-0020.200 ppm
2019-12-04B1905453-003ND
2019-12-04B1905453-004ND
2019-12-04B1905453-005ND