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National Drinking Water Database

National Drinking Water Database - Chemical Contaminants

Aroclor 1221

Status: Regulated - EPA has established a maximum legal limit in tapwater for this contaminant.

Aroclor 1221 is a member of the polychlorinated biphenyl (PCB) group of industrial chemicals used as dielectrics, coolants and lubricants in electrical equipment; PCBs contaminate water by leaching from landfills or other waste deposits. [read more]

Found above
health guidelines
Found above
legal limit
Water utilities
People Served

Aroclor 1221 Exposure by State

Water utilities in 2 states have reported detecting Aroclor 1221 in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.

StateWater Suppliers with Aroclor 1221 contaminationWater suppliers reporting Aroclor 1221 above health-based limits
New York223,721223,721

The Most Polluted Communities

3 water utilities reported detecting Aroclor 1221 in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Aroclor 1221 level

RankSystem Population Served Positive test results of total reported tests Average Level
1Artesian Water Company
Newark, DE
201,0001 of 83< 0.01 ppb
(0 to 0.17 ppb)
2Waterford Water Works
Waterford, NY
12,0001 of 50< 0.01 ppb
(0 to 0.01 ppb)
3Halfmoon Water District
Halfmoon, NY
11,7211 of 55< 0.01 ppb
(< .01 to 0.006985 ppb)

Health Based Limits for Aroclor 1221

Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.0 ppb
Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.0.5 ppb

Testing Summary for Aroclor 1221

Are tests routinely required for Aroclor 1221 by federal law?Yes
Water suppliers reporting tests for Aroclor 1221 (2004-2009):6,569 of 47,576
Average testing rate for water supplier reporting tests (2004-2009):0.3 per year

Violation Summary for Aroclor 1221

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards for Aroclor 1221 since 2004

Maximum Contaminant Level Exceedance Violations0
Monitoring Violations76
Reporting Violations0

Government, industry, academic studies and classifications

government/industry list/academic study appears on list as classification(s)
European Commission on Endocrine DisruptionPCB AROCLOR 1221


government/industry list/academic study reference
European Commission on Endocrine DisruptionEU (European Union)- Strategy for Endocrine Disrupters 2007. Commision on endocrin disruption requested by the European Parliament in 1998.

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