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EWG's Tap Water Database — 2021 UPDATE

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Tetrachloroethylene (perchloroethylene)

Town of Hempstead Water Department

Dry cleaning chemical tetrachloroethylene, or perc, can cause cancer. It pollutes soil and groundwater due to emissions from dry cleaning facilities, and automotive, metalworking and other industries. Read More.

The EPA considers tetrachloroethylene a likely human carcinogen. It has been linked with increased incidence of lung, breast and colon cancers. Tetrachloroethylene also damages the liver, kidneys and central nervous system. The California public health goal of 0.06 parts per billion, set to protect against cancer, is 80 times lower than the amount allowed by the federal government, which is a Maximum Contaminant Level of 5 parts per billion.

Click here to read more about carcinogenic VOCs.

 

542

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0161 ppb1474ND - 0.650 ppb
20150.0187 ppb612ND - 0.590 ppb
20160.00919 ppb861ND - 0.790 ppb
2017ND770ND
2018ND900ND
2019ND810ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for tetrachloroethylene was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL) 5 ppb

The legal limit for tetrachloroethylene, established in 1991, was based on analytical detection limits at the time that the standard was set. This limit does not fully protect against the risk of cancer due to tetrachloroethylene exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-0697773-01062014-PND
2014-01-0697771-01062014-PND
2014-01-0697766-01062014-PND
2014-01-0997838-01092014-PND
2014-01-0997841-01092014-PND
2014-01-0997843-01092014-PND
2014-01-1397879-01132014-PND
2014-01-2397946-01232014-PND
2014-01-2797968-01272014ND
2014-01-2797969-01272014-PND
2014-01-2797966-01272014-PND
2014-02-0398001-02032014-PND
2014-02-0397999-02032014-PND
2014-02-0397993-02032014-PND
2014-02-1098053-02102014-PND
2014-02-1098050-02102014-PND
2014-02-2098115-02202014-PND
2014-02-2098113-02202014-PND
2014-02-2098114-02202014-PND
2014-02-2098111-02202014-PND
2014-03-0398158-03032014-PND
2014-03-0398165-03032014-PND
2014-03-0698200-03062014-PND
2014-03-0698197-03062014-PND
2014-03-1098212-03102014-PND
2014-03-1098215-03102014-PND
2014-03-1798265-03172014-PND
2014-03-1798266-03172014-PND
2014-03-1798261-POCSND
2014-03-1798262-POCSND
2014-04-0398343-04032014-PND
2014-04-0398342-04032014-PND
2014-04-0498352-04042014-PND
2014-04-0498354-04042014-PND
2014-04-0798380-04072014-PND
2014-04-0798369-04072014-PND
2014-04-1498435-04142014-PND
2014-04-1898467-04182014-PND
2014-04-2198493-04212014-PND
2014-04-2198492-04212014-PND
2014-04-2898513-04282014-PND
2014-04-2898514-04282014-PND
2014-04-2898515-04282014-PND
2014-04-2898516-04282014-PND
2014-05-0198579-05012014-PND
2014-05-0198576-05012014-PND
2014-05-0198573-05012014-PND
2014-05-0198585-05012014-P0.530 ppb
2014-05-0598594-05052014-PND
2014-05-0698629-POCSND
2014-05-0698628-POCSND
2014-05-0698627-POCSND
2014-05-0698633-05062014-PND
2014-05-0698630-POCSND
2014-05-0998648-05092014-PND
2014-05-1298658-05122014-PND
2014-05-1298656-05122014-PND
2014-05-13686-05132014-POCND
2014-05-1398690-05132014-PND
2014-05-1398691-05132014-PND
2014-05-2098709-05202014-PND
2014-05-2098714-05202014-PND
2014-05-2098711-05202014-PND
2014-05-2798723-05272014-PND
2014-05-2798729-05272014-PND
2014-05-2798724-05272014-PND
2014-05-2798727-05272014-PND
2014-05-2798728-05272014-PND
2014-06-0298774-06022014-PND
2014-06-0298768-06022014-PND
2014-06-0298766-06022014-PND
2014-06-0298771-06022014-PND
2014-06-0398793-06032014-PND
2014-06-0398796-06032014-PND
2014-06-0398797-06032014-PND
2014-06-0998872-06092014-PND
2014-06-0998871-06092014-PND
2014-06-0998861-06092014-PND
2014-06-1698922-06162014-PND
2014-06-1698921-06162014-PND
2014-06-2398942-POCSND
2014-06-23098944-06232014-ND
2014-06-23098939-POCSND
2014-06-23098940-POCSND
2014-06-23098941-POCSND
2014-06-2398941-POCSND
2014-06-23098942-POCSND
2014-06-23098945-06232014-ND
2014-07-0199008-07012014-PND
2014-07-019005-07012014-POND
2014-07-0199000-07012014-PND
2014-07-0199006-07012014-PND
2014-07-0299023-07022014-PND
2014-07-0299026-07022014-PND
2014-07-0299029-07022014-PND
2014-07-0799056-07072014-PND
2014-07-1099111-07102014-PND
2014-07-1099107-07102014-PND
2014-07-1099109-07102014-PND
2014-07-1499129-07142014-PND
2014-07-2499216-07242014-PND
2014-07-2499211-POCSND
2014-07-2499212-POCSND
2014-07-2999247-07292014ND
2014-07-2999244-07292014-PND
2014-08-0499259-08042014-PND
2014-08-0499256-08042014-PND
2014-08-0499253-08042014-PND
2014-08-0499257-08042014-PND
2014-08-1199307-08112014-PND
2014-08-1199310-08112014-PND
2014-08-1199314-08112014-PND
2014-08-1199317-08112014-P0.650 ppb
2014-08-1399338-08132014-PND
2014-08-1899353-08182014-PND
2014-08-1899352-08182014-PND
2014-08-1899354-08182014-PND
2014-08-2799407-08272014-PND
2014-08-2799406-08272014-PND
2014-09-0299433-09022014-PND
2014-09-0299436-09022014-PND
2014-09-0499464-09042014-PND
2014-09-0499469-09042014-PND
2014-09-0899594-09082014-PND
2014-09-0899592-09082014-PND
2014-09-0899589-09082014-P0.650 ppb
2014-09-0899591-09082014-PND
2014-10-0299764-POCSND
2014-10-0299756-POCSND
2014-10-0699797-POCS0.540 ppb
2014-10-06AS-09846ND
2014-10-0799761-POCSND
2014-10-1699843-POCSND
2014-11-0399921-11032014-PND
2014-11-0399916-POCSND
2014-11-0399919-POCSND
2014-11-1099963-11102014-PND
2014-11-1099964-11102014-PND
2014-11-1099958-11102014-PND
2014-11-17100036-11172014-ND
2014-11-17100030-11172014-ND
2014-12-04100142-12042014-ND
2014-12-04100148-12042014-ND
2014-12-04100145-12042014-ND
2014-12-08100160-12082014-ND
2014-12-12100211-12122014-ND
2014-12-15100215-12152014-ND
2015-01-05100310-01052015-ND
2015-01-05100304-01052014-ND
2015-01-09100341-01092015-ND
2015-01-09100344-01092015-ND
2015-01-09100347-01092015-ND
2015-01-14100392-01142015-ND
2015-01-14100391-01142015-ND
2015-01-29100458-01292015-ND
2015-02-06100518ND
2015-02-06100513ND
2015-02-131502884-005ND
2015-02-131502884-003ND
2015-02-131502884-008ND
2015-02-201502C53-008A-POCND
2015-02-201502C53-007A-POCND
2015-02-201502C53-003AND
2015-03-021503012-003AND
2015-03-021503012-008AND
2015-03-021503012-011AND
2015-03-111503726-005AND
2015-03-111503727-003A-POCND
2015-03-161503A23-006A-POC0.550 ppb
2015-03-20100614ND
2015-03-20100616ND
2015-03-20100615ND
2015-03-20100618ND
2015-03-20100620ND
2015-03-231006320.590 ppb
2015-03-23100631ND
2015-04-021504130-001AND
2015-04-021504130-003A-POCND
2015-04-021504135-003A-POCND
2015-04-061504298-010A-POCND
2015-04-061504298-003A-POCND
2015-04-06100693ND
2015-04-10100727ND
2015-04-16100759ND
2015-04-16100758ND
2015-04-16100760ND
2015-04-16100762ND
2015-04-16100761ND
2015-04-20100780ND
2015-04-20100783ND
2015-04-20100784ND
2015-04-29100865ND
2015-04-29100864ND
2015-05-04100892ND
2015-05-06100898ND
2015-05-06100904AND
2015-05-11100923ND
2015-05-11100920ND
2015-05-19100969ND
2015-05-22100983ND
2015-05-22100985ND
2015-06-0496154-POCSND
2015-06-0496150-POCSND
2015-06-181506F26-003AND
2015-06-181506F26-004AND
2015-06-181506F26-002AND
2015-06-181506F26-001AND
2015-06-2596409-POCSND
2016-01-071601384-004AND
2016-01-071601384-002AND
2016-01-071601416-003A-POCND
2016-01-071601384-005AND
2016-01-071601416-008AND
2016-01-111601551-008AND
2016-02-011602052-003AND
2016-02-017602052-009AND
2016-02-011602052-008AND
2016-02-011602052-006AND
2016-02-0102055-003AND
2016-02-031602265-001AND
2016-02-031602265-002AND
2016-02-031602265-003AND
2016-02-031602265-004AND
2016-02-041602449-009AND
2016-02-041602449-006AND
2016-03-021603199-002AND
2016-03-021603202-005AND
2016-03-031603320-006AND
2016-03-031603320-003A-POCND
2016-03-091603796-004AND
2016-03-091603796-007AND
2016-03-091603796-006AND
2016-04-061604575-011AND
2016-04-061604575-003A-POCND
2016-04-061604575-008AND
2016-04-071604676-004AND
2016-04-071604676-007AND
2016-04-071604676-006AND
2016-04-071604676-010AND
2016-05-051605453-004AND
2016-05-051605453-010AND
2016-05-121605B07-008AND
2016-05-121605B07-010AND
2016-05-121605B07-007AND
2016-05-121605B07-005AND
2016-05-181605G62-005AND
2016-06-031606340-002AND
2016-06-061606478-003A0.790 ppb
2016-06-081606736-005AND
2016-06-091606924-005AND
2016-06-091606924-003AND
2016-06-091606924-008AND
2016-06-091606924-002AND
2016-06-141606E56-008AND
2016-06-161606G57-002AND
2016-06-281606Q81-002AND
2016-06-281606Q81-001AND
2016-07-061607344-010AND
2016-07-061607344-008AND
2016-07-061607344-003AND
2016-07-061607344-011AND
2016-07-081607648-005AND
2016-08-021608149-011AND
2016-08-021608149-003AND
2016-08-091608910-008AND
2016-08-091608910-006AND
2016-08-101608A34-004AND
2016-08-101608A34-005AND
2016-08-101608A34-002AND
2016-08-251608O15-002AND
2016-08-251608O15-001AND
2016-09-011609025-011AND
2016-09-011609025-008AND
2016-09-011609025-003AND
2016-09-011609025-010AND
2016-09-061609258-008AND
2016-09-061609258-010AND
2016-09-071609472-003AND
2016-10-04701099017-POCND
2016-10-04701099009-POCND
2016-10-06701323002-POCND
2016-10-06701323008-POCND
2016-10-06701323010-POCND
2016-11-02703519007ND
2016-11-02703519004-POCND
2016-11-02703519009-POCND
2016-11-03703637002-POCND
2016-11-04703724003-POCND
2016-11-04703724009-POCND
2016-12-02705925008ND
2016-12-02705925011ND
2016-12-02705925003ND
2016-12-05705999005ND
2016-12-07706685007ND
2017-01-05708399005-POCND
2017-01-10708729003-POCND
2017-01-111601551-010AND
2017-01-13709076004-POCND
2017-01-13709076002-POCND
2017-01-19709458011-POCND
2017-02-077010758003-POCND
2017-02-087010885007-POCND
2017-02-087010885002-POCND
2017-02-147011257006-POCND
2017-02-147011257004-POCND
2017-02-277012186003-POCND
2017-03-077012753006-POCND
2017-03-077012753004-POCND
2017-03-087013004005-POCND
2017-03-087013004003-POCND
2017-03-097013035002-POCND
2017-04-057015032003ND
2017-04-057015032008ND
2017-04-077015309003-POCND
2017-04-107015399005ND
2017-04-107015399002-POCND
2017-05-037017627003ND
2017-05-037017627011ND
2017-05-047017752002ND
2017-05-047017752004ND
2017-05-057017909003-POCND
2017-05-127018524003-POCND
2017-06-027020224007-POCSND
2017-06-027020224003-POCND
2017-06-027020224005-POCSND
2017-06-057020320003-POCND
2017-07-037023050007-POCND
2017-07-037023050004-POCND
2017-07-037023052002-POCSND
2017-07-077023412003-POCSND
2017-07-077023412004-POCSND
2017-07-127023861008-POCSND
2017-07-127023861010-POCSND
2017-08-017025775008-POCSND
2017-08-017025775003-POCSND
2017-08-017025775010-POCSND
2017-08-017025775011-POCSND
2017-08-037026093005-POCND
2017-08-037026093007-POCSND
2017-08-087026539003-POCND
2017-08-097026689003-POCND
2017-09-067029016003-POCND
2017-09-067029016007-POCND
2017-09-077029177008-POCND
2017-09-077029177005-POCND
2017-09-127029590007-POCND
2017-09-147029892003-POCND
2017-09-277031179002-POCND
2017-10-037031737007-POCND
2017-10-037031737002-POCND
2017-10-037031737005-POCND
2017-10-047031849006-POCND
2017-10-047031849003-POCND
2017-10-047031848004-POCND
2017-10-127032706005-POCND
2017-10-177033127005-POCND
2017-10-257034010006-POCND
2017-10-317034346002-POCND
2017-11-037034730005-POCND
2017-11-037034730007-POCND
2017-11-037034730003-POCND
2017-11-067034853007-POCND
2017-11-087035130002-POCND
2017-12-017036912007-POCND
2017-12-017036912003-POCND
2017-12-037031737003-POCND
2017-12-077037473003-POCND
2017-12-077037532002-POCND
2017-12-137038054005-POCND
2017-12-137038054003-POCND
2017-12-287039302003-POCND
2018-01-037039733010-POCND
2018-01-037039733003-POCND
2018-01-037039733008-POCND
2018-01-037039733006-POCND
2018-01-057039704003ND
2018-01-107040041003-POCND
2018-02-027041920003-POCND
2018-02-027041951001-POCND
2018-02-027041920008-POCND
2018-02-087042396003ND
2018-03-027044358005ND
2018-03-027044358007ND
2018-03-027044358003ND
2018-03-067044552006ND
2018-03-087044740003ND
2018-03-227045972006-POCND
2018-04-037047071003ND
2018-04-037047071005ND
2018-04-067047543009-POCND
2018-04-067047543003-POCND
2018-04-107047859002-POCND
2018-04-177048655005ND
2018-04-177048655003ND
2018-04-177048655006ND
2018-04-267049700006ND
2018-05-017050079011ND
2018-05-0170500079009ND
2018-05-027050219006ND
2018-05-097051123006-POCND
2018-05-097051123008-POCND
2018-06-057053674009ND
2018-06-057053674004ND
2018-06-077054056005ND
2018-06-077054056002ND
2018-06-077054056007ND
2018-06-137054814006ND
2018-06-137054814008ND
2018-06-297056740005ND
2018-07-037057044011ND
2018-07-037057044003ND
2018-07-067057362008-POCND
2018-07-067057362005-POCND
2018-07-067057362010-POCND
2018-07-117057812003ND
2018-07-127058016008ND
2018-07-187058622009-POCND
2018-07-187058622002-POCND
2018-07-197058816003-POCND
2018-07-267059522007-POCND
2018-07-267059522003-POCND
2018-07-317059892007-POCND
2018-07-317059892003-POCND
2018-08-027060187011-POCND
2018-08-027060187003-POCND
2018-08-097061015003-POCND
2018-08-097061015010ND
2018-08-097061015006-POCND
2018-08-167061856005-POCND
2018-08-167061856003-POCND
2018-08-167061856009-POCND
2018-08-227062472005-POCND
2018-08-227062472003-POCND
2018-08-297063110003-POCND
2018-09-067063864008ND
2018-09-067063864003ND
2018-09-077064059003ND
2018-09-127064505004ND
2018-09-177065025007ND
2018-09-177065025005ND
2018-10-027066554011ND
2018-10-027066554003ND
2018-10-027066554009ND
2018-10-037066763002ND
2018-10-037066763004ND
2018-10-097067335003ND
2018-10-307069424007ND
2018-11-027069921003ND
2018-11-027069921008ND
2018-11-027069921010ND
2018-11-057069965006ND
2018-11-137070815003ND
2018-11-207071621003ND
2018-11-297072398004ND
2018-12-077073198009ND
2018-12-077073198003ND
2018-12-077073198011ND
2018-12-117073533006ND
2018-12-127073757002ND
2018-12-187074242003ND
2018-12-207074593004ND
2019-01-047075583004ND
2019-01-047075583011ND
2019-01-047075583009ND
2019-01-087075849008ND
2019-01-087075849006ND
2019-01-177076934003ND
2019-02-017078178003ND
2019-02-017078178008ND
2019-02-017078178010ND
2019-02-057078459006ND
2019-02-057078459008ND
2019-02-087078929004ND
2019-02-087078929002ND
2019-02-147079540003ND
2019-03-127082045002ND
2019-03-127082045009ND
2019-03-127082045007ND
2019-03-157082555003ND
2019-03-287083788005ND
2019-04-057084758011ND
2019-04-057084758003ND
2019-04-057084758009ND
2019-04-127085676008ND
2019-04-127085676006ND
2019-04-127085676010ND
2019-05-027087921004ND
2019-05-027087921011ND
2019-05-027087921009ND
2019-05-037088090007ND
2019-05-037088090005ND
2019-05-167089862002ND
2019-05-237090608003ND
2019-05-307091501001ND
2019-06-047091929007ND
2019-06-047091929005ND
2019-06-057092229003ND
2019-06-057092229009ND
2019-06-067092447005ND
2019-06-067092447002ND
2019-06-117093125004ND
2019-06-187094050005ND
2019-06-257095169005ND
2019-07-017095866009ND
2019-07-017095866011ND
2019-07-017095866003ND
2019-07-027096169005ND
2019-07-027096169007ND
2019-07-027096169009ND
2019-07-097096748005ND
2019-08-017099598010-POCND
2019-08-017099598004-POCND
2019-08-017099598006-POCND
2019-08-017099598002-POCND
2019-08-0670100030008ND
2019-08-0670100030004ND
2019-08-1370101031004-POCND
2019-08-2070102091002ND
2019-08-2170102305003ND
2019-09-0370103415007ND
2019-09-0370103415003ND
2019-09-0370103415011ND
2019-09-0570103910006ND
2019-09-0570103910008ND
2019-09-0970104147005ND
2019-09-0970104147003ND
2019-10-0370107158010ND
2019-10-0370107158008ND
2019-10-0370107158006ND
2019-10-0970107899008ND
2019-10-0970107899006ND
2019-10-1570108461006ND
2019-11-0470110537010ND
2019-11-0470110537003ND
2019-11-0770111085005ND
2019-11-0770111085003ND
2019-11-1870112242011ND
2019-11-1970112429006ND
2019-11-1970112429004ND
2019-12-0270113587008ND
2019-12-0270113587006ND
2019-12-0270113587002ND