Hardness
Very Hard
286 PPM · 16.7 GPG
Local water dashboard
Official source aggregationWater quality in Sun Valley, AZ 86029
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Navajo County.
1 active health-based violation
- Primary matched system
- Sun Valley Utilities
- Source water
- Groundwater
- County
- Navajo 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
0.007 mg/L
47% of action level
Utility match
1 system
Serves 287 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
286 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
286
mg/L as CaCO₃ equivalent
Grains per gallon
16.7
1 GPG ≈ 17.1 PPM
What this means at home
At 286 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
0.4 mi
Observation range
Jun 23, 2016–Mar 14, 2023
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: A-18-22 09DDC1 (Well).USGS source documentation ↗
Regional context
Is 86029 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Sun Valley median
286 PPM
About the same1 indexed ZIP readings · Range 286–286 PPM
Arizona median
241 PPM
45 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)
0.007 mg/L
Reported Dec 31, 2025
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 0.007
EPA limit 0.015
TTHM
Measured in MG/L
Local 0.093
EPA limit 0.08
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 30
- Health-based
- 4
- Active health-based
- 1
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Lead and Copper Rule | AZ0409001 | Unaddressed | Jan 1, 2026 |
| TTHM | AZ0409001 | Resolved | Oct 1, 2025through Dec 31, 2025 |
| Total Haloacetic Acids (HAA5) | AZ0409001 | Resolved | Oct 1, 2025through Dec 31, 2025 |
| Chlorine | AZ0409001 | Archived | Oct 1, 2025through Oct 31, 2025 |
| LEAD AND COPPER RULE REVISIONS | AZ0409001 | Unaddressed | Jul 2, 2025 |
| Consumer Confidence Rule | AZ0409001 | Resolved | Jul 1, 2025through Oct 21, 2025 |
| TTHMHealth-basedReported 0.093 MG/L · MCL 0.08 | AZ0409001 | Resolved | Apr 1, 2025through Jun 30, 2025 |
| Revised Total Coliform Rule | AZ0409001 | Resolved | Dec 1, 2024through Apr 21, 2025 |
| Public Notice | AZ0409001 | Resolved | Feb 16, 2024through Jun 13, 2024 |
| Public Notice | AZ0409001 | Resolved | May 21, 2023through Jun 13, 2024 |
| Public Notice | AZ0409001 | Resolved | Apr 27, 2023through Jun 5, 2023 |
| Lead and Copper Rule | AZ0409001 | Resolved | Jan 1, 2023through Apr 3, 2024 |
| TTHM | AZ0409001 | Resolved | Dec 30, 2022through Apr 3, 2024 |
| Consumer Confidence Rule | AZ0409001 | Resolved | Oct 2, 2022through Nov 4, 2022 |
| Lead and Copper Rule | AZ0409001 | Resolved | Oct 1, 2022through Jun 5, 2023 |
| Public Notice | AZ0409001 | Resolved | May 25, 2022through Aug 4, 2022 |
| TTHM | AZ0409001 | Resolved | Apr 1, 2022through Apr 3, 2024 |
| Revised Total Coliform Rule | AZ0409001 | Resolved | Mar 1, 2022through May 16, 2022 |
| TTHMHealth-basedReported 0.102 MG/L · MCL 0.08 | AZ0409001 | Resolved | Jan 1, 2022through Mar 31, 2022 |
| Total Haloacetic Acids (HAA5) | AZ0409001 | Resolved | Nov 1, 2021through Jan 31, 2022 |
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 Sun Valley ZIP 86029 using 286 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
286 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
TTHM 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.
Frequently asked
Water questions for Sun Valley
Is tap water safe in Sun Valley?+
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 286 PPM, or 16.7 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 286 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.