Hardness
Moderately Hard
120 PPM · 7 GPG
Local water dashboard
Official source aggregationWater quality in Peoria, AZ 85381
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Maricopa County.
2 active health-based violations
- Primary matched system
- Peoria City Of
- Source water
- Surface water + Groundwater
- County
- Maricopa County
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
Review needed
2 active health-based records
Lead 90th percentile
0 mg/L
0% of action level
Utility match
3 systems
Serves 187,676 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
120 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
120
mg/L as CaCO₃ equivalent
Grains per gallon
7
1 GPG ≈ 17.1 PPM
What this means at home
At 120 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
22
Nearest site
1.5 mi
Observation range
Jan 4, 2016–Mar 24, 2026
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: ARROW-SKUNK CREEK @ 79TH AVENUE (NORTH BANK) (Stream).USGS source documentation ↗
Regional context
Is 85381 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Peoria median
120 PPM
About the same4 indexed ZIP readings · Range 120–128 PPM
Arizona median
241 PPM
121 PPM lower285 indexed ZIP readings · Range 66.4–1250 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 mg/L
Reported Dec 31, 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
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 12
- Health-based
- 2
- Active health-based
- 2
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Lead and Copper Rule | AZ0407096 | Unaddressed | Jan 1, 2026 |
| Groundwater RuleHealth-based | AZ0407532 | Unaddressed | Sep 17, 2025 |
| Groundwater RuleHealth-based | AZ0407532 | Unaddressed | Sep 17, 2025 |
| CARBON, TOTAL | AZ0407096 | Resolved | Mar 1, 2025through Mar 31, 2025 |
| Long Term 2 Enhanced Surface Water Treatment Rule | AZ0407096 | Resolved | Oct 1, 2024through Oct 31, 2024 |
| Nitrate | AZ0407096 | Resolved | Jan 1, 2024through Dec 31, 2024 |
| Chlorine | AZ0407070 | Resolved | Jan 1, 2024through Jan 31, 2024 |
| CARBON, TOTAL | AZ0407096 | Resolved | Jan 1, 2022through Mar 31, 2022 |
| Bromate | AZ0407096 | Resolved | Jan 1, 2022through Mar 31, 2022 |
| Chlorine | AZ0407070 | Resolved | Jan 1, 2022through Mar 31, 2022 |
| Long Term 2 Enhanced Surface Water Treatment Rule | AZ0407096 | Resolved | Nov 1, 2021through Nov 30, 2021 |
| Surface Water Treatment Rule | AZ0407096 | Resolved | May 1, 2021through May 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 Peoria ZIP 85381 using 120 PPM nearby hardness and 1 reported measurement benchmarks.
Drinking water protection
Under-Sink Reverse Osmosis System
Groundwater Rule has a measured benchmark flag or active health-based SDWIS record in this profile.
A certified multi-stage RO system targets a broader range of dissolved contaminants at the kitchen tap.
Explore under-sink filtrationAffiliate 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 Peoria
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Peoria
Is tap water safe in Peoria?+
EPA ECHO reports 2 active health-based violations among the associated community water systems. Review the affected utility's current notice and Consumer Confidence Report.
How hard is the water?+
Nearby USGS observations produce an estimate of 120 PPM, or 7 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.