Copper in Well Water
Source
Copper in well water usually comes from copper pipes when the water is corrosive (low pH or high salt).
Limits
EPA's action level is 1.3 mg/L. Health Canada's maximum is 2.0 mg/L, with an aesthetic objective of 1.0 mg/L. High copper can cause stomach upset.
What to do
Run water that has sat for hours before drinking, test pH, and treat corrosive water. See low pH and corrosive water.
Sources
- EPA: National Primary Drinking Water Regulations
- Health Canada: Guidelines for Canadian Drinking Water Quality, summary table
- Penn State Extension: Corrosive water problems
Questions
Should I test copper and lead together?
Yes. Both come from corrosion of plumbing.
Free well water safety checklist
15 family-friendly steps based on CDC and EPA guidance. Print it, keep it on the fridge, and know when to call a certified lab.
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