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National Drinking Water Database

Copper in Oklahoma

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 Oklahoma

596 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
1Bryan Co Rwd # 9
Hendrix, OK
22318 of 181533.06 ppb
(24.5 to 3375 ppb)
2Oak Hill Estates
Cartwright, OK
3013 of 131011.95 ppb
(243.6 to 1960.75 ppb)
3Colbert Boat Club
Cartwright, OK
7510 of 10817.62 ppb
(21.2 to 2089.4 ppb)
4Spring Cove East Resort
Salina, OK
453 of 3813.73 ppb
(541.2 to 1175.6 ppb)
Okarche, OK
1,1102 of 2805.85 ppb
(436.8 to 1174.9 ppb)
6Lincoln Co Rwd #3
Wellston, OK
5751 of 1770 ppb
(770 ppb)
7Logan Co Rwd #2
Crescent, OK
6502 of 2767.93 ppb
(553.53 to 982.32 ppb)
Pittsburg, OK
2803 of 3724.67 ppb
(507.3 to 974.07 ppb)
9Donaldson Water District
Swink, OK
1056 of 6627.21 ppb
(140.74 to 1370.5 ppb)
10Garfield Co Rwd #1 (Krem-Hill)
Kremlin, OK
5404 of 4599.54 ppb
(85.3 to 1035 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 Oklahoma

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in Oklahoma since 2004

Violation TypeNumber of Violations
Failure to monitor regularly53