Inorganic
Copper in your water
Is Copper in drinking water dangerous?
It depends on the level and how long you're exposed. The EPA legal limit (MCL) for Copper is 1300 ppb. The EPA also sets a non-enforceable health goal (MCLG) of 1300 ppb. Meeting the legal limit isn't the same as zero risk — test your water to know your level.
How do you remove Copper from water?
Copper is treated by Water Softener and Reverse Osmosis. Choose a system independently certified to NSF/ANSI standards to reduce Copper, and test your water first to confirm the level.
Source: EPA MCL / MCLG; WHO guidelines; NSF/ANSI · 2026
Health effects
Copper enters tap water mainly by corroding household plumbing and fixtures. Short-term high exposure causes stomach and intestinal distress; long-term excess can harm the liver and kidneys, particularly in people with certain genetic conditions.
The health-based goal vs. the legal limit
The federal legal limit (MCL) is the maximum allowed by law. The EPA health goal (MCLG) is the level below which no health risk is expected — it is non-enforceable and often stricter than the legal limit.
EPA health goal (MCLG)
1300 ppb
Federal legal limit (MCL)
1300 ppb
Source: EPA National Primary Drinking Water Regulations (MCL / MCLG) · 2026
What removes Copper
Ion exchange
Water Softener
Swaps the calcium and magnesium that cause hard water for sodium — so scale stops forming.
Look for: NSF/ANSI 44 certification
How it works→Semipermeable membrane filtration
Reverse Osmosis
Pushes water through a fine membrane that removes the dissolved solids most filters miss.
Look for: NSF/ANSI 58 certification
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Is Copper in your water?
Check your city's public record, then book a free 30-minute test to confirm what's in your home.