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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Fairfax County Water Authority

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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270

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
20140.00118 ppm344ND - 0.01000 ppm
20150.00250 ppm246ND - 0.01000 ppm
20160.00600 ppm3010ND - 0.0200 ppm
20170.00208 ppm486ND - 0.0200 ppm
20180.000735 ppm684ND - 0.0200 ppm
2019ND660ND

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
2014-01-30FW13122702-03_NI0.01000 ppm
2014-01-30FW13122702-03_NO0.01000 ppm
2014-01-30FW13122701-03_NIND
2014-01-30FW13122701-03_NOND
2014-02-27FW14012840-03_NI0.01000 ppm
2014-02-27FW14012840-03_NO0.01000 ppm
2014-02-27FW14012839-03_NOND
2014-02-27FW14012839-03_NIND
2014-03-27FW14022109-03_NOND
2014-03-27FW14022109-03_NIND
2014-03-27FW14022110-03_NIND
2014-03-27FW14022110-03_NOND
2014-04-24FW14032669-03_NIND
2014-04-24FW14032670-03_NIND
2014-04-24FW14032669-03_NOND
2014-04-24FW14032670-03_NOND
2014-07-24FW14061906-03_NOND
2014-07-24FW14061907-03_NIND
2014-07-24FW14061907-03_NOND
2014-07-24FW14061906-03_NIND
2014-09-25FW14081481-03_NIND
2014-09-25FW14081479-03_NIND
2014-09-25FW14081479-03_NOND
2014-09-25FW14081481-03_NOND
2014-10-30FW140923099-03_NND
2014-10-30FW140923098-03_NND
2014-10-30FW140923098-03_NND
2014-10-30FW140923099-03_NND
2014-11-13FW141022038-03_NND
2014-11-13FW141022038-03_NND
2014-11-13FW141022037-03_NND
2014-11-13FW141022037-03_NND
2014-12-03FW141113029-02_NND
2014-12-03FW141113029-02_NND
2015-01-2700125-FAIRFAX COND
2015-01-2700125-FAIRFAX COND
2015-02-1200125-FAIRFAX CO0.01000 ppm
2015-02-1200125-FAIRFAX CO0.01000 ppm
2015-03-1200125-FAIRFAX COND
2015-03-1200125-FAIRFAX COND
2015-04-0900125-FAIRFAX COND
2015-04-0900125-FAIRFAX COND
2015-05-0700125-FAIRFAX COND
2015-05-0700125-FAIRFAX COND
2015-06-1100125-FAIRFAX COND
2015-06-1100125-FAIRFAX COND
2015-07-0900125-FAIRFAX COND
2015-07-0900125-FAIRFAX COND
2015-08-0600125-FAIRFAX COND
2015-08-0600125-FAIRFAX COND
2015-09-1000125-FAIRFAX COND
2015-09-1000125-FAIRFAX COND
2015-10-1500125-FAIRFAX COND
2015-10-1500125-FAIRFAX COND
2015-11-1200125-FAIRFAX CO0.01000 ppm
2015-11-1200125-FAIRFAX CO0.01000 ppm
2015-12-0300125-FAIRFAX CO0.01000 ppm
2015-12-0300125-FAIRFAX CO0.01000 ppm
2016-01-14FW151231001-02_N0.0200 ppm
2016-01-14FW151231001-02_N0.0200 ppm
2016-02-04FW160121044-02_N0.01000 ppm
2016-02-04FW160121044-02_N0.01000 ppm
2016-03-10FW160224042-02_NND
2016-03-10FW160224042-02_NND
2016-04-14FW160316067-02_NND
2016-04-14FW160316067-02_NND
2016-05-12FW160422080-02_NND
2016-05-12FW160422080-02_NND
2016-06-09FW160525077-02_NND
2016-06-09FW160525077-02_NND
2016-07-14FW160617069-02_NND
2016-07-14FW160617069-02_NND
2016-08-11FW160725068-02_NND
2016-08-11FW160725068-02_NND
2016-09-08FW160825057-02_NND
2016-09-08FW160825057-02_NND
2016-10-13FW160922038-02_NND
2016-10-13FW160922038-02_NND
2016-11-03FW161018056-02_NND
2016-11-03FW161018056-02_NND
2016-12-01FW161121047-01_N0.0200 ppm
2016-12-01FW161121047-01_N0.0200 ppm
2016-12-01FW161121047-02_N0.0200 ppm
2016-12-01FW161121047-02_N0.0200 ppm
2016-12-01FW161121047-03_N0.0200 ppm
2016-12-01FW161121047-03_N0.0200 ppm
2016-12-01FW161121047-04_NND
2016-12-01FW161121047-04_NND
2017-01-26FW161216028-03_NND
2017-01-26FW161216028-03_NND
2017-01-26FW161216029-03_NND
2017-01-26FW161216029-03_NND
2017-02-23FW170126071-03_NND
2017-02-23FW170126071-03_NND
2017-02-23FW170126072-03_NND
2017-02-23FW170126072-03_NND
2017-03-09FW170227045-03_NND
2017-03-09FW170227045-03_NND
2017-03-09FW170227041-03_NND
2017-03-09FW170227041-03_NND
2017-04-13FW170328069-03_NND
2017-04-13FW170328069-03_NND
2017-04-13FW170328070-03_NND
2017-04-13FW170328070-03_NND
2017-05-11FW170426060-03_NND
2017-05-11FW170426060-03_NND
2017-05-11FW170426062-03_NND
2017-05-11FW170426062-03_NND
2017-07-13FW170628091-03_NND
2017-07-13FW170628091-03_NND
2017-07-13FW170628092-03_NND
2017-07-13FW170628092-03_NND
2017-08-10FW170724080-03_NND
2017-08-10FW170724080-03_NND
2017-08-10FW170724081-03_NND
2017-08-10FW170724081-03_NND
2017-09-14FW170821081-03_NND
2017-09-14FW170821081-03_NND
2017-09-14FW170821082-03_NND
2017-09-14FW170821082-03_NND
2017-10-12FW170927067-03_NND
2017-10-12FW170927067-03_NND
2017-10-12FW170927068-03_NND
2017-10-12FW170927068-03_NND
2017-11-02FW171024046-03_NND
2017-11-02FW171024046-03_NND
2017-11-02FW171024045-03_NND
2017-11-02FW171024045-03_NND
2017-12-07FW171120061-01_N0.0200 ppm
2017-12-07FW171120061-01_N0.0200 ppm
2017-12-07FW171120061-03_N0.0200 ppm
2017-12-07FW171120061-03_N0.0200 ppm
2017-12-07FW171120061-04_N0.01000 ppm
2017-12-07FW171120061-04_N0.01000 ppm
2017-12-07FW171120061-02_NND
2017-12-07FW171120061-02_NND
2018-01-25FW171226071-04_NND
2018-01-25FW171226071-04_NND
2018-01-25FW171226072-04_NND
2018-01-25FW171226072-04_NND
2018-02-08FW180117063-04_NND
2018-02-08FW180117063-04_NND
2018-02-08FW180117064-04_NND
2018-02-08FW180117064-04_NND
2018-02-21FW180212011-01_NND
2018-02-21FW180212011-01_NND
2018-02-21FW180212011-02_NND
2018-02-21FW180212011-02_NND
2018-02-21FW180212011-03_NND
2018-02-21FW180212011-03_NND
2018-02-21FW180212011-04_NND
2018-02-21FW180212011-04_NND
2018-03-22FW180220072-04_NND
2018-03-22FW180220072-04_NND
2018-03-22FW180220073-04_NND
2018-03-22FW180220073-04_NND
2018-04-12FW180315012-02_NND
2018-04-12FW180315012-02_NND
2018-04-12FW180315012-03_NND
2018-04-12FW180315012-03_NND
2018-04-12FW180315012-04_NND
2018-04-12FW180315012-04_NND
2018-04-12FW180315012-05_NND
2018-04-12FW180315012-05_NND
2018-04-12FW180315013-04_NND
2018-04-12FW180315013-04_NND
2018-05-10FW180424075-04_NND
2018-05-10FW180424075-04_NND
2018-05-10FW180424076-04_NND
2018-05-10FW180424076-04_NND
2018-06-21FW180522063-04_NND
2018-06-21FW180522063-04_NND
2018-06-21FW180522064-04_NND
2018-06-21FW180522064-04_NND
2018-07-12FW180615025-02_NND
2018-07-12FW180615025-02_NND
2018-07-12FW180615025-03_NND
2018-07-12FW180615025-03_NND
2018-07-12FW180615025-04_NND
2018-07-12FW180615025-04_NND
2018-07-12FW180615025-06_NND
2018-07-12FW180615025-06_NND
2018-07-12FW180615026-04_NND
2018-07-12FW180615026-04_NND
2018-08-09FW180716073-04_NND
2018-08-09FW180716073-04_NND
2018-08-09FW180716074-02_NND
2018-08-09FW180716074-02_NND
2018-09-06FW180824050-04_NND
2018-09-06FW180824050-04_NND
2018-09-06FW180824051-04_NND
2018-09-06FW180824051-04_NND
2018-10-18FW181017007-01_NND
2018-10-18FW181017007-01_NND
2018-10-18FW181017007-02_N0.01000 ppm
2018-10-18FW181017007-02_NND
2018-10-18FW181017007-03_N0.01000 ppm
2018-10-18FW181017007-03_NND
2018-10-18FW181017007-04_NND
2018-10-18FW181017007-04_NND
2018-11-01FW181023017-04_NND
2018-11-01FW181023017-04_NND
2018-11-01FW181023018-04_N0.0200 ppm
2018-11-01FW181023018-04_N0.01000 ppm
2019-01-03FW181218030-02_NND
2019-01-03FW181218030-02_NND
2019-01-03FW181218030-03_NND
2019-01-03FW181218030-03_NND
2019-01-03FW181218030-04_NND
2019-01-03FW181218030-04_NND
2019-01-03FW181218031-02_NND
2019-01-03FW181218031-02_NND
2019-02-07FW190124008-04_NND
2019-02-07FW190124008-04_NND
2019-02-07FW190124009-02_NND
2019-02-07FW190124009-02_NND
2019-03-21FW190219085-04_NND
2019-03-21FW190219085-04_NND
2019-03-21FW190219086-02_NND
2019-03-21FW190219086-02_NND
2019-04-11FW190319015-02_NND
2019-04-11FW190319015-02_NND
2019-04-11FW190319015-03_NND
2019-04-11FW190319015-03_NND
2019-04-11FW190319015-04_NND
2019-04-11FW190319015-04_NND
2019-04-11FW190319015-05_NND
2019-04-11FW190319015-05_NND
2019-04-11FW190319016-02_NND
2019-04-11FW190319016-02_NND
2019-05-09FW190422080-05_NND
2019-05-09FW190422080-05_NND
2019-05-09FW190422081-02_NND
2019-05-09FW190422081-02_NND
2019-06-06FW190521052-05_NND
2019-06-06FW190521052-05_NND
2019-06-06FW190521053-02_NND
2019-06-06FW190521053-02_NND
2019-07-11FW190626014-02_NND
2019-07-11FW190626014-02_NND
2019-07-11FW190626014-03_NND
2019-07-11FW190626014-03_NND
2019-07-11FW190626014-04_NND
2019-07-11FW190626014-04_NND
2019-07-11FW190626014-05_NND
2019-07-11FW190626014-05_NND
2019-07-11FW190626015-02_NND
2019-07-11FW190626015-02_NND
2019-08-08FW190725066-05_NND
2019-08-08FW190725066-05_NND
2019-08-08FW190725067-02_NND
2019-08-08FW190725067-02_NND
2019-09-05FW190827033-05_NND
2019-09-05FW190827033-05_NND
2019-09-05FW190827034-02_NND
2019-09-05FW190827034-02_NND
2019-10-03FW190923067-02_NND
2019-10-03FW190923067-02_NND
2019-10-03FW190923067-03_NND
2019-10-03FW190923067-03_NND
2019-10-03FW190923067-04_NND
2019-10-03FW190923067-04_NND
2019-10-03FW190923067-05_NND
2019-10-03FW190923067-05_NND
2019-10-03FW190923068-02_NND
2019-10-03FW190923068-02_NND
2019-11-14FW191029061-05_NND
2019-11-14FW191029061-05_NND
2019-11-14FW191029062-02_NND
2019-11-14FW191029062-02_NND