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National Drinking Water Database

Copper in Texas

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 Texas

2,804 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
1Harris County Mud 156
4231 of 1802 ppb
(802 ppb)
2Lakewood Water East
Grand Prairie, TX
2761 of 1602 ppb
(602 ppb)
3Harris County Mud 248
1,1375 of 5481.6 ppb
(325 to 663.5 ppb)
4South Road Wsc
Austin, TX
1001 of 1445 ppb
(445 ppb)
5Hickory Creek Sud
Celeste, TX
3,0122 of 2349.7 ppb
(10.4 to 689 ppb)
6City of Cranfills Gap
Cranfills Gap, TX
5221 of 1323 ppb
(323 ppb)
7Cal Farleys Family Program
Borger, TX
1011 of 1269 ppb
(269 ppb)
8Little Oak Forest Subdivision
Houston, TX
301 of 1268 ppb
(268 ppb)
9South San Gabriel Ranches
Houston, TX
5432 of 2262.3 ppb
(2.6 to 522 ppb)
10Rice University
Houston, TX
6,5002 of 2259.9 ppb
(7.8 to 512 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 Texas

There are no violations reported for this contaminant in Texas