Hardness
Very Hard
306.5 PPM · 17.9 GPG
Local water dashboard
Official source aggregationWater quality in Eloy, AZ 85131
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.
1 reported benchmark flag
- Primary matched system
- Cca - Eloy Complex
- 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
4 systems
Serves 8,852 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
306.5 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
306.5
mg/L as CaCO₃ equivalent
Grains per gallon
17.9
1 GPG ≈ 17.1 PPM
What this means at home
At 306.5 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
24
Nearest site
35.1 mi
Observation range
Jan 11, 2016–Dec 17, 2024
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: D-13-12 03BCC1 (Well).USGS source documentation ↗
Regional context
Is 85131 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Eloy median
297 PPM
10 PPM higher2 indexed ZIP readings · Range 288–306.5 PPM
Arizona median
241 PPM
66 PPM higher285 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 pass1 fail
Lead (PB90)
0 mg/L
Reported Dec 31, 2027
Copper (CU90)
Not available
No numerical 90th-percentile result
Numerical coverage
2 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 11
EPA limit 10
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 84
- Health-based
- 19
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| NitrateHealth-basedReported 11 MG/L · MCL 10 | AZ0411030 | Archived | Jan 1, 2026through Mar 31, 2026 |
| NitrateHealth-basedReported 11 MG/L · MCL 10 | AZ0411030 | Archived | Jan 1, 2026through Mar 31, 2026 |
| Lead and Copper Rule | AZ0411005 | Resolved | Jan 1, 2026through Mar 26, 2026 |
| Revised Total Coliform Rule | AZ0411030 | Resolved | Dec 1, 2025through Dec 31, 2025 |
| Consumer Confidence Rule | AZ0411005 | Resolved | Oct 2, 2025through Oct 14, 2025 |
| Consumer Confidence Rule | AZ0411321 | Resolved | Oct 2, 2025through Oct 14, 2025 |
| Arsenic | AZ0411115 | Resolved | Oct 1, 2025through Dec 31, 2025 |
| Lead and Copper Rule | AZ0411030 | Resolved | Oct 1, 2025through Nov 14, 2025 |
| Chlorine | AZ0411005 | Resolved | May 1, 2025through May 31, 2025 |
| Chlorine | AZ0411321 | Resolved | May 1, 2025through May 31, 2025 |
| NitrateHealth-basedReported 33 MG/L · MCL 10 | AZ0411005 | Resolved | Jan 1, 2025through Dec 31, 2025 |
| Lead and Copper Rule | AZ0411005 | Resolved | Jan 1, 2025through Nov 1, 2024 |
| Lead and Copper Rule | AZ0411321 | Resolved | Jan 1, 2025through Oct 4, 2024 |
| NitrateHealth-basedReported 19 MG/L · MCL 10 | AZ0411321 | Resolved | Oct 1, 2024through Dec 31, 2024 |
| TTHM | AZ0411030 | Resolved | Jul 1, 2024through Sep 30, 2024 |
| Total Haloacetic Acids (HAA5) | AZ0411030 | Resolved | Jul 1, 2024through Sep 30, 2024 |
| Total Haloacetic Acids (HAA5) | AZ0411321 | Resolved | Jul 1, 2024through Sep 30, 2024 |
| TTHM | AZ0411321 | Resolved | Jul 1, 2024through Sep 30, 2024 |
| NitrateHealth-basedReported 17 MG/L · MCL 10 | AZ0411321 | Resolved | Jul 1, 2024through Sep 30, 2024 |
| Revised Total Coliform Rule | AZ0411115 | Resolved | Jun 1, 2024through Aug 13, 2024 |
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 Eloy ZIP 85131 using 306.5 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
306.5 PPM is 3× 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 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 Eloy
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Eloy
Is tap water safe in Eloy?+
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 306.5 PPM, or 17.9 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 306.5 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.