Hardness
Moderately Hard
84 PPM · 4.9 GPG
Local water dashboard
Official source aggregationWater quality in Erie, PA 16546
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Erie County.
No active health-based violation reported
- Primary matched system
- Erie City Water Authority
- Source water
- Surface water
- County
- Erie County
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
No active flag
0 active health-based records
Lead 90th percentile
0.0011 mg/L
7% of action level
Utility match
1 system
Serves 220,001 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
84 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
84
mg/L as CaCO₃ equivalent
Grains per gallon
4.9
1 GPG ≈ 17.1 PPM
What this means at home
At 84 PPM, mineral scale can build up on fixtures and heating elements, reduce soap lather, and leave visible spotting. Hardness is primarily an aesthetic and appliance concern—not itself a tap-water safety rating.
USGS sites used
20
Nearest site
24.9 mi
Observation range
Jan 25, 2016–Jun 15, 2026
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: Conneaut Creek at Cherry Hill, PA (Stream).USGS source documentation ↗
Regional context
Is 16546 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Erie median
83 PPM
About the same12 indexed ZIP readings · Range 81–85.5 PPM
Pennsylvania median
84 PPM
About the same139 indexed ZIP readings · Range 43–166.5 PPM
EPA benchmark screen
Contaminant snapshot
Available numerical results from associated SDWIS community water systems, compared with the applicable action level or federal MCL. Federal measured-value coverage is incomplete.
1 pass
Lead (PB90)
0.0011 mg/L
Reported Sep 30, 2025
Copper (CU90)
Not available
No numerical 90th-percentile result
Numerical coverage
1 comparable result
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0.0011
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 16
- Health-based
- 0
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Revised Total Coliform Rule | PA6250028 | Archived | Apr 1, 2026through Apr 30, 2026 |
| Interim Enhanced Surface Water Treatment Rule | PA6250028 | Resolved | Feb 1, 2026through Feb 28, 2026 |
| Revised Total Coliform Rule | PA6250028 | Resolved | Aug 11, 2025through Dec 17, 2025 |
| Revised Total Coliform Rule | PA6250028 | Resolved | Sep 1, 2024through Sep 30, 2024 |
| Surface Water Treatment Rule | PA6250028 | Resolved | Feb 1, 2024through Feb 29, 2024 |
| Interim Enhanced Surface Water Treatment Rule | PA6250028 | Resolved | Aug 1, 2023through Aug 31, 2023 |
| Interim Enhanced Surface Water Treatment Rule | PA6250028 | Resolved | Jul 1, 2023through Jul 31, 2023 |
| Total Haloacetic Acids (HAA5) | PA6250028 | Resolved | Apr 1, 2023through Jun 30, 2023 |
| TTHM | PA6250028 | Resolved | Apr 1, 2023through Jun 30, 2023 |
| CARBON, TOTAL | PA6250028 | Resolved | Dec 1, 2022through Feb 1, 2023 |
| CARBON, TOTAL | PA6250028 | Resolved | Nov 1, 2022through Jan 31, 2023 |
| Interim Enhanced Surface Water Treatment Rule | PA6250028 | Resolved | Nov 1, 2022through Nov 30, 2022 |
| CARBON, TOTAL | PA6250028 | Resolved | Oct 1, 2022through Dec 31, 2022 |
| CARBON, TOTAL | PA6250028 | Resolved | Mar 1, 2022through May 24, 2022 |
| CARBON, TOTAL | PA6250028 | Resolved | Mar 1, 2021through May 17, 2021 |
| 2,4-D | PA6250028 | Resolved | Jan 1, 2021through Mar 31, 2021 |
No reported violation does not prove that every contaminant was tested or absent; SDWIS measured values are incomplete and lag state records.
Solutions matcher
Your personalized water action plan
Matched to Erie ZIP 16546 using 84 PPM nearby hardness and 1 reported measurement benchmarks.
No urgent match
Start with an independent water test
This profile does not trigger a treatment recommendation. Test at the tap before investing in equipment.
Affiliate disclosure: we may earn a commission from qualifying purchases, at no added cost to you. Product matching is educational and does not replace certified water testing.
Nearby indexed reports
Compare ZIPs in Erie
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Erie
Is tap water safe in Erie?+
EPA ECHO shows no active health-based violation for the associated systems in this reporting snapshot. This does not prove every contaminant is absent; federal records can lag and household plumbing can change tap conditions.
How hard is the water?+
Nearby USGS observations produce an estimate of 84 PPM, or 4.9 grains per gallon, classified as moderately hard. This is not a household tap measurement.
Do I need a water softener?+
There is no high-hardness trigger in this profile. Confirm with a tap test before buying equipment.