Water Hardness in Erie, PA
Pennsylvania · 9 zip codes · 4 matched water systems
City avg (weighted): 120 PPM
Dataset updated March 9, 20264 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology
Is Erie, PA Water Hard or Soft?
The displayed hardness for Erie, PA is 120 PPM (7 GPG) from Erie City Water Authority, classified as moderately hard. The citywide weighted average is 120 PPM.
Water hardness is not a drinking-water safety score. It measures calcium and magnesium minerals, and address-level results can shift by pressure zone, supply blend, building plumbing, or private well.
How this city reading is built
This city reading is a weighted rollup across 4 matched water systems and 9 ZIP codes. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.
Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.
Water Systems in Erie
These systems are matched to Erie, PA. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.
| Water System | Source | Hardness | Pop. Served |
|---|---|---|---|
| Erie City Water Authority PA6250028 | surface water | 120 PPM Moderately HardUSGS estimate: 110 PPM | |
| Summit Township Water Authorit PA6250090 | surface water | 120 PPM Moderately HardUSGS estimate: 110 PPM | |
| Mckean Twp Waterworks PA6250096 | surface water | 120 PPM Moderately HardUSGS estimate: 110 PPM | |
| Sunny Acres Mobilehome Park PA6250023 | groundwater | 120 PPM Moderately HardUSGS estimate: 110 PPM |
Zip Codes in Erie, PA
What This Means For You
Use this city reading as a local planning estimate, not a final treatment specification. Hardness can vary by utility zone, seasonal blend, private well, and building plumbing. Confirm your tap reading with a utility report or home hardness test before sizing equipment.
Know your water hardness?
If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Erie, PA.
Frequently Asked Questions
How hard is the water in Erie, PA?
The citywide weighted average water hardness in Erie, PA is 120 PPM (7 GPG), classified as moderately hard. This is based on 4 matched water systems.
Do I need a water softener in Erie, PA?
With a citywide average hardness of 120 PPM, a water softener is worth considering for homes in Erie. Confirm your tap reading before sizing equipment.
Is hard water in Erie, PA safe to drink?
Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.
How many water systems serve Erie, PA?
Erie, Pennsylvania is served by 4 matched water systems across 9 zip codes.
Learn More About Your Water
How to Test Water Hardness at Home
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10 min readPPM to GPG Converter + Water Hardness Scale Explained
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