Hardness
Very Hard
209.5 PPM · 12.3 GPG
Local water dashboard
Official source aggregationWater quality in Mammoth, AZ 85618
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 active health-based violation
- Primary matched system
- Mammoth Town Of
- Source water
- Groundwater
- County
- Pinal County
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
Review needed
1 active health-based record
Lead 90th percentile
0.019 mg/L
127% of action level
Utility match
1 system
Serves 1,181 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
39 mi
Observation range
Jan 11, 2016–Aug 16, 2016
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: D-13-12 03DBA1 (Well).USGS source documentation ↗
Regional context
Is 85618 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Mammoth 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.
0 pass1 fail
Lead (PB90)
0.019 mg/L
Reported Dec 31, 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 0.019
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 13
- Health-based
- 1
- Active health-based
- 1
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Lead and Copper Rule | AZ0411018 | Unaddressed | Jan 1, 2026 |
| Lead and Copper RuleHealth-based | AZ0411018 | Unaddressed | Dec 1, 2025 |
| Public Notice | AZ0411018 | Resolved | Nov 20, 2025through Dec 29, 2025 |
| Public Notice | AZ0411018 | Resolved | Nov 16, 2025through Dec 29, 2025 |
| Consumer Confidence Rule | AZ0411018 | Resolved | Oct 2, 2025through Oct 10, 2025 |
| LEAD AND COPPER RULE REVISIONS | AZ0411018 | Unaddressed | Jul 2, 2025 |
| TTHM | AZ0411018 | Resolved | Jul 1, 2024through Sep 30, 2024 |
| Total Haloacetic Acids (HAA5) | AZ0411018 | Resolved | Jul 1, 2024through Sep 30, 2024 |
| Chlorine | AZ0411018 | Resolved | Jun 1, 2024through Jun 30, 2024 |
| Consumer Confidence Rule | AZ0411018 | Resolved | Oct 2, 2023through Apr 9, 2024 |
| TTHM | AZ0411018 | Resolved | Jul 1, 2023through Sep 30, 2023 |
| Total Haloacetic Acids (HAA5) | AZ0411018 | Resolved | Jul 1, 2023through Sep 30, 2023 |
| Consumer Confidence Rule | AZ0411018 | Resolved | Oct 2, 2021through Oct 7, 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 Mammoth ZIP 85618 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 systemsDrinking water protection
Under-Sink Reverse Osmosis System
Lead (90th percentile), Lead and Copper Rule 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.
Nearby indexed reports
Compare ZIPs in Mammoth
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Mammoth
Is tap water safe in Mammoth?+
EPA ECHO reports 1 active health-based violation 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.