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National Drinking Water Database

Copper in Delaware

Copper is a naturally occuring metal and drinking water contaminant that enters tap water by corrosion of household plumbing systems and erosion of natural deposits. [read more]

The Most Polluted Communities in Delaware

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

Ranked by highest average Copper level

RankSystem Population Served Positive test results of total reported tests Average Level
1Carpenters Row
Greenville, DE
601 of 11700 ppb
(1700 ppb)
2Stage Village Mhc
Millsboro, DE
931 of 1564.6 ppb
(564.6 ppb)
3Holiday Pines
Lewes, DE
2102 of 4542.75 ppb
(0 to 1128.8 ppb)
4Woods Edge Mobile Home Park
Cherry Hill, DE
453 of 6451.98 ppb
(0 to 1353.67 ppb)
5United Water Delaware
Wilmington, DE
105,2702 of 2256.68 ppb
(95.9 to 417.45 ppb)
6Governor Bacon Health Center
Delaware City, DE
5251 of 1214.67 ppb
(214.67 ppb)
7Middletown Water Department
Middletown, DE
16,0004 of 4164.58 ppb
(91.5 to 192 ppb)
8Donovan/Smith Mobile Home Park
Pittsford, DE
3691 of 6157.07 ppb
(0 to 942.44 ppb)
9Homestead Park
Pittsville, DE
2304 of 6144.33 ppb
(0 to 355 ppb)
10South Bethany
Newark, DE
12,0006 of 6117.51 ppb
(7.75 to 539 ppb)

Health Based Limits for Copper

California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.300 ppb
National Secondary Drinking Water RegulationsA National Secondary Drinking Water Regulation is a non-enforceable guideline regarding contaminants that may cause cosmetic effects (such as taste, odor, or color). Some states choose to adopt them as enforceable standards. Source: U.S. Environmental Protection Agency. 1000 ppb
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.1300 ppb
EPA Human Health Water Quality CriteriaWater quality criteria set by the US EPA provide guidance for states and tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect human health. These are non-enforceable standards based upon exposure by both drinking water and the contribution of water contamination to other consumed foods. Source: U.S. Environmental Protection Agency.1300 ppb

Violation Summary for Copper in Delaware

There are no violations reported for this contaminant in Delaware