Hardness
Very Hard
209.5 PPM · 12.3 GPG
Local water dashboard
Official source aggregationWater quality in Marana, AZ 85658
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.
2 active health-based violations
- Primary matched system
- Marana Municipal - Marana
- Source water
- Groundwater
- County
- Pinal 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
10 systems
Serves 15,162 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
209.5 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
209.5
mg/L as CaCO₃ equivalent
Grains per gallon
12.3
1 GPG ≈ 17.1 PPM
What this means at home
At 209.5 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
8
Nearest site
12.9 mi
Observation range
Jan 11, 2016–Aug 16, 2016
Estimate confidence
Moderate
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 85658 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Marana median
210 PPM
About the same2 indexed ZIP readings · Range 209.5–209.5 PPM
Arizona median
241 PPM
31 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 Jun 30, 2026
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
- 61
- Health-based
- 5
- Active health-based
- 2
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Lead and Copper Rule | AZ0410139 | Resolved | Jan 1, 2025through Nov 12, 2025 |
| Lead and Copper Rule | AZ0410070 | Resolved | Jan 1, 2025through Oct 12, 2025 |
| LEAD AND COPPER RULE REVISIONS | AZ0410139 | Resolved | Oct 17, 2024through Nov 27, 2024 |
| LEAD AND COPPER RULE REVISIONSHealth-based | AZ0410139 | Resolved | Oct 17, 2024through Nov 27, 2024 |
| LEAD AND COPPER RULE REVISIONS | AZ0410070 | Resolved | Oct 17, 2024through Dec 9, 2024 |
| LEAD AND COPPER RULE REVISIONSHealth-based | AZ0410070 | Resolved | Oct 17, 2024through Dec 9, 2024 |
| Lead and Copper Rule | AZ0410139 | Resolved | Oct 1, 2024through Nov 18, 2024 |
| Lead and Copper Rule | AZ0410070 | Resolved | Oct 1, 2024through Nov 18, 2024 |
| Total Haloacetic Acids (HAA5) | AZ0410139 | Resolved | Jul 1, 2024through Sep 30, 2024 |
| TTHM | AZ0410139 | Resolved | Jul 1, 2024through Sep 30, 2024 |
| TTHM | AZ0410070 | Resolved | Jul 1, 2024through Sep 30, 2024 |
| Total Haloacetic Acids (HAA5) | AZ0410070 | Resolved | Jul 1, 2024through Sep 30, 2024 |
| Chlorine | AZ0410150 | Resolved | Oct 1, 2023through Dec 31, 2023 |
| Public Notice | AZ0410139 | Resolved | Oct 2, 2022through Aug 29, 2023 |
| Public Notice | AZ0410139 | Resolved | Oct 2, 2022through Aug 29, 2023 |
| Chlorine | AZ0410007 | Resolved | Oct 1, 2022through Dec 31, 2022 |
| Public Notice | AZ0410139 | Resolved | Apr 2, 2022through Aug 29, 2023 |
| Consumer Confidence Rule | AZ0410139 | Resolved | Oct 2, 2021through Oct 5, 2021 |
| Consumer Confidence Rule | AZ0410070 | Resolved | Oct 2, 2021through Oct 5, 2021 |
| Consumer Confidence Rule | AZ0410272 | Resolved | Oct 2, 2021through Dec 29, 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 Marana ZIP 85658 using 209.5 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
209.5 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 systemsAffiliate 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 Marana
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Marana
Is tap water safe in Marana?+
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 209.5 PPM, or 12.3 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 209.5 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.