Skip to content
FilterScored

Contaminant · Water

Copper

EPA action level 1.3 mg/L (Lead and Copper Rule). 3 of the water filters we score hold an accredited NSF, WQA, or IAPMO certification to reduce Copper, and 3 more market it with no accredited certification we could verify. A claim is not a certification.

What it is

Like lead, copper is something your home adds on the way to the faucet, not something in the source water. It leaches from copper plumbing, soldered joints, and brass fittings inside household and building systems, and you will see the most of it in water that has sat in the pipes overnight. Soft or acidic water tends to dissolve a bit more copper from whatever plumbing it touches - so a first-thing-in-the-morning glass is the worst case.

Why it matters

The EPA sets an action level of 1.3 mg/L for copper under the Lead and Copper Rule, the same rule that governs lead. Because copper comes from the plumbing rather than the source water, your own tap can read differently from your neighbor's even on the same supply - which is why your result is the one that counts. What we score is whether a filter is certified to reduce copper, not any health outcome.

What removes it

Look for certification to NSF/ANSI 53 for copper, or reverse osmosis certified to NSF/ANSI 58. The trap: a carbon filter is not automatically a copper filter - a pitcher or faucet unit only earns credit here if copper actually appears on its certified contaminant list, which is exactly what we check for you. Some pitchers do carry NSF/ANSI 53 copper certification, so it is the listing that separates them, not the filter type alone.

Reference: EPA Lead and Copper Rule, action level 1.3 mg/L; NSF/ANSI 53 (copper reduction) and NSF/ANSI 58 (reverse osmosis).

Scored filters certified for Copper

Marketed for Copper, but not certified

These scored filters market Copper reduction but we found no accredited NSF, WQA, or IAPMO certification for it - "tested to" is not "certified to." Absence of certification is not proof a product fails to reduce it, only that we found no independent verification.

FAQ

Does a Brita or carbon pitcher remove copper?
Only if that specific model is certified to NSF/ANSI 53 for copper. Carbon alone is not a guarantee, but the good news is some pitchers do carry the certification. In our catalog the Brita Standard Pitcher and the PUR Plus Pitcher are both listed on the public NSF/WQA certification database as certified to NSF/ANSI 53 for copper, so the listing is what to check rather than the filter type.
Does boiling remove copper?
No, and it nudges the wrong way: boiling does not remove copper, and because it evaporates water it can leave copper slightly more concentrated. To reduce copper, use a filter certified to NSF/ANSI 53 for copper or a reverse osmosis system certified to NSF/ANSI 58.

Related