Hardness
Very Hard
560 PPM · 32.7 GPG
Local water dashboard
Official source aggregationWater quality in Mohave Valley, AZ 86440
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Mohave County.
1 reported benchmark flag
- Primary matched system
- Epcor - Willow Valley/king Street
- Source water
- Groundwater
- County
- Mohave 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
0.0034 mg/L
23% of action level
Utility match
3 systems
Serves 3,408 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
560 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
560
mg/L as CaCO₃ equivalent
Grains per gallon
32.7
1 GPG ≈ 17.1 PPM
What this means at home
At 560 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
3
Nearest site
11.5 mi
Observation range
Oct 10, 2017–Oct 26, 2022
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: 007N024E06N001S (Well).USGS source documentation ↗
Regional context
Is 86440 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Mohave Valley median
560 PPM
About the same1 indexed ZIP readings · Range 560–560 PPM
Arizona median
241 PPM
319 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)
0.0034 mg/L
Reported Dec 31, 2026
Copper (CU90)
1.4 mg/L
Reported Dec 31, 2009
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0.0034
EPA limit 0.015
Copper (90th percentile)
Measured in mg/L
Local 1.4
EPA limit 1.3
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 29
- Health-based
- 2
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Public Notice | AZ0408333 | Resolved | Aug 2, 2025through Oct 23, 2025 |
| Public Notice | AZ0408333 | Resolved | Jul 30, 2025through Oct 23, 2025 |
| LEAD AND COPPER RULE REVISIONS | AZ0408040 | Unaddressed | Jul 2, 2025 |
| Consumer Confidence Rule | AZ0408333 | Resolved | Jul 1, 2025through Oct 15, 2025 |
| ChloriteHealth-based | AZ0408040 | Resolved | Apr 1, 2025through Apr 30, 2025 |
| Public Notice | AZ0408333 | Resolved | Dec 20, 2024through Mar 28, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | AZ0408333 | Resolved | Oct 17, 2024through Jul 7, 2025 |
| LEAD AND COPPER RULE REVISIONS | AZ0408333 | Resolved | Oct 17, 2024through Jul 7, 2025 |
| Consumer Confidence Rule | AZ0408333 | Resolved | Oct 2, 2024through Oct 7, 2025 |
| Revised Total Coliform Rule | AZ0408333 | Resolved | Jul 1, 2024through Jul 31, 2024 |
| Revised Total Coliform Rule | AZ0408333 | Resolved | Jun 1, 2024through Jun 30, 2024 |
| Public Notice | AZ0408333 | Resolved | Jan 2, 2024through Oct 23, 2025 |
| Total Haloacetic Acids (HAA5) | AZ0408333 | Resolved | Jan 1, 2024through Dec 31, 2024 |
| TTHM | AZ0408333 | Resolved | Jan 1, 2024through Dec 31, 2024 |
| Public Notice | AZ0408333 | Resolved | Dec 13, 2023through Apr 10, 2024 |
| Chlorine | AZ0408333 | Resolved | Apr 1, 2023through Jun 30, 2023 |
| Chlorite | AZ0408129 | Resolved | Mar 1, 2023through Mar 31, 2023 |
| Chlorine | AZ0408333 | Resolved | Jan 1, 2023through Mar 31, 2023 |
| TTHM | AZ0408333 | Resolved | Jan 1, 2023through Nov 14, 2023 |
| Total Haloacetic Acids (HAA5) | AZ0408333 | Resolved | Jan 1, 2023through Nov 14, 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 Mohave Valley ZIP 86440 using 560 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
560 PPM is 5× 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
Copper (90th percentile) 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 Mohave Valley
Is tap water safe in Mohave Valley?+
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 560 PPM, or 32.7 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 560 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.