Water quality · PA
Pennsylvania Water Quality (2026)
Last updated: June 2026
Ranks among the most contaminated states. About 19% of tested systems had PFAS above the EPA standard; USGS found PFAS in 76% of sampled PA rivers and streams.
Our Pennsylvania coverage focuses on the 4 metros below. Each city page lists the utility's water source, hardness in grains per gallon, contaminants flagged above EWG's stricter health guideline, and the whole-house system that fits that specific profile, not a generic recommendation copied across the state.
Common contaminants flagged across Pennsylvania
Across the Pennsylvania cities we cover, these are the contaminants most often reported above EWG's health guideline. None exceed federal EPA legal limits.
- PFAS (regional)
- disinfection byproducts
- disinfection byproducts (Susquehanna)
- lead service lines
- PFAS
- lead service lines (notable)
Cities we cover in Pennsylvania
| City | Hardness | Flagged above EWG guideline | Best fit |
|---|---|---|---|
| Allentown | - | PFAS (regional), disinfection byproducts | Carbon + POU RO |
| Harrisburg | - | disinfection byproducts (Susquehanna) | Softener + carbon |
| Philadelphia | 8-12 | lead service lines, disinfection byproducts, PFAS | Carbon for chloramine; POU RO for lead and PFAS |
| Pittsburgh | - | lead service lines (notable), disinfection byproducts | POU RO / lead filter + carbon |
Recommended systems for Pennsylvania
Most Pennsylvania homes benefit from a layered setup: whole-house carbon for chlorine and taste, a softener if your CCR shows hardness above 7 gpg, and a certified under-sink RO at the kitchen tap if lead, PFAS, nitrate or arsenic are flagged.
Free tool · 30 seconds
Not sure which system you actually need?
Skip the spec-sheet rabbit hole. Our local-aware selector pairs your situation with the right filter, softener or RO, then layers in your city's real hardness and contaminant data. No email, no signup.
Find your system →Pennsylvania water FAQ
+Is Pennsylvania tap water safe to drink?
Yes, by federal standards: the cities on this page all meet every EPA legal limit. The contaminants we flag sit above EWG's stricter, non-enforceable health guideline, which is the benchmark most homeowners use when deciding whether to filter further at home.
+Why is Pennsylvania water hard?
Hardness comes from calcium and magnesium picked up as water moves through local geology. In Pennsylvania, the values vary city by city, see the table above for your metro. Anything above 7 grains per gallon is considered hard and is where a softener starts to make a noticeable difference.
+Do I need a softener or a filter in Pennsylvania?
Different problems, different tools. A whole-house carbon filter handles chlorine, chloramine and taste. A softener handles scale from hard water. Many Pennsylvania homes benefit from both, and a kitchen-tap RO if lead, PFAS or nitrate appear on your CCR.
Sources: EWG; USGS