Copper usually enters water from corrosion of household plumbing rather than the source. It is measured at the tap. Most people are not affected at the levels found in drinking water.
In Florida, Copper was reported by 654 community water systems serving about 3,113,269 people. 1 of those readings were above the federal legal limit, together serving 44 people.
The highest reading relative to the limit was at Gator Wilderness Camp School in Charlotte County, at 755% of it.
Where it comes from: Corrosion of household plumbing; erosion of natural deposits.
Enforceable. A utility must stay at or under this.
Health-based, not enforceable. Often lower than the limit, sometimes zero.
California OEHHA PHG (2008)
Health effects the EPA associates with it: Stomach and intestinal distress. Liver or kidney damage in people with certain conditions.
Water at or under the legal limit meets federal safety standards. A reading above a health goal is not the same as being unsafe, and health goals are set purely on health without regard to cost or treatability. Both are shown so the margin is visible either way.
Showing the 25 highest of 654 systems that reported Copper.
These figures describe water as delivered by each utility, not what your home’s plumbing adds after it arrives. Informational; not a substitute for testing your own tap.