Hardness
Very Hard
243 PPM · 14.2 GPG
Local water dashboard
Official source aggregationWater quality in Stanfield, AZ 85172
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Pinal County.
3 reported benchmark flags
- Primary matched system
- Maricopa Mountain Dwid 1
- Source water
- Groundwater
- County
- Pinal 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 mg/L
0% of action level
Utility match
3 systems
Serves 450 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
243 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
243
mg/L as CaCO₃ equivalent
Grains per gallon
14.2
1 GPG ≈ 17.1 PPM
What this means at home
At 243 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
43
Nearest site
33.1 mi
Observation range
Jan 11, 2016–Dec 18, 2024
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: D-01-02 10ACA1 (Well).USGS source documentation ↗
Regional context
Is 85172 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Stanfield median
243 PPM
About the same1 indexed ZIP readings · Range 243–243 PPM
Arizona median
241 PPM
About the same285 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 pass3 fail
Lead (PB90)
0 mg/L
Reported Dec 31, 2025
Copper (CU90)
Not available
No numerical 90th-percentile result
Numerical coverage
4 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0
EPA limit 0.015
Nitrate
Measured in MG/L
Local 22
EPA limit 10
Combined Uranium
Measured in UG/L
Local 37
EPA limit 30
Arsenic
Measured in MG/L
Local 0.011
EPA limit 0.01
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 63
- Health-based
- 27
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| NitrateHealth-basedReported 22 MG/L · MCL 10 | AZ0411087 | Archived | Jan 1, 2026through Mar 31, 2026 |
| Revised Total Coliform Rule | AZ0411712 | Resolved | Jan 1, 2026through Feb 20, 2026 |
| NitrateHealth-basedReported 22 MG/L · MCL 10 | AZ0411087 | Archived | Oct 1, 2025through Dec 31, 2025 |
| Public Notice | AZ0411087 | Resolved | Sep 27, 2025through Nov 7, 2025 |
| LEAD AND COPPER RULE REVISIONS | AZ0411712 | Unaddressed | Jul 2, 2025 |
| NitrateHealth-basedReported 21 MG/L · MCL 10 | AZ0411087 | Archived | Jul 1, 2025through Sep 30, 2025 |
| Public Notice | AZ0411087 | Resolved | Apr 1, 2025through May 19, 2025 |
| NitrateHealth-basedReported 23 MG/L · MCL 10 | AZ0411087 | Archived | Apr 1, 2025through Jun 30, 2025 |
| NitrateHealth-basedReported 16 MG/L · MCL 10 | AZ0411087 | Archived | Jan 1, 2025through Mar 31, 2025 |
| Public Notice | AZ0411712 | Resolved | Dec 20, 2024through Jan 23, 2025 |
| LEAD AND COPPER RULE REVISIONS | AZ0411712 | Resolved | Oct 17, 2024through Feb 5, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | AZ0411712 | Resolved | Oct 17, 2024through Feb 5, 2025 |
| NitrateHealth-basedReported 17 MG/L · MCL 10 | AZ0411087 | Archived | Oct 1, 2024through Dec 31, 2024 |
| NitrateHealth-basedReported 19 MG/L · MCL 10 | AZ0411087 | Archived | Jul 1, 2024through Sep 30, 2024 |
| NitrateHealth-basedReported 16 MG/L · MCL 10 | AZ0411087 | Archived | Apr 1, 2024through Jun 30, 2024 |
| NitrateHealth-basedReported 12 MG/L · MCL 10 | AZ0411087 | Archived | Jan 1, 2024through Mar 31, 2024 |
| Combined Uranium | AZ0411712 | Resolved | Jan 1, 2024through Mar 31, 2024 |
| NitrateHealth-basedReported 11 MG/L · MCL 10 | AZ0411712 | Resolved | Jan 1, 2024through Mar 31, 2024 |
| NitrateHealth-basedReported 13 MG/L · MCL 10 | AZ0411087 | Archived | Oct 1, 2023through Dec 31, 2023 |
| NitrateHealth-basedReported 12.4 MG/L · MCL 10 | AZ0411087 | Archived | Jul 1, 2023through Sep 30, 2023 |
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 Stanfield ZIP 85172 using 243 PPM nearby hardness and 4 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
243 PPM is 2× the high-hardness trigger used by this matcher.
Designed to reduce scale on fixtures, water heaters, glassware, and plumbing throughout the home.
Compare whole-house systemsDrinking water protection
Under-Sink Reverse Osmosis System
Nitrate, Combined Uranium, Arsenic have 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.
Frequently asked
Water questions for Stanfield
Is tap water safe in Stanfield?+
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 243 PPM, or 14.2 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 243 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.