Hardness
Very Hard
306 PPM · 17.9 GPG
Local water dashboard
Official source aggregationWater quality in Kingman, AZ 86409
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 active health-based violation
- Primary matched system
- Kingman Municipal Water
- Source water
- Groundwater
- County
- Mohave 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 mg/L
0% of action level
Utility match
10 systems
Serves 45,000 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
306 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
306
mg/L as CaCO₃ equivalent
Grains per gallon
17.9
1 GPG ≈ 17.1 PPM
What this means at home
At 306 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
13
Nearest site
29.9 mi
Observation range
Oct 10, 2017–Apr 22, 2024
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: B-29-15 25BCC1 [HUALAPAI TEST WELL] (Well).USGS source documentation ↗
Regional context
Is 86409 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Kingman median
300 PPM
6 PPM higher2 indexed ZIP readings · Range 293–306 PPM
Arizona median
241 PPM
65 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 pass
Lead (PB90)
0 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
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 162
- Health-based
- 2
- Active health-based
- 1
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Consumer Confidence Rule | AZ0408082 | Resolved | Oct 2, 2025through Oct 15, 2025 |
| Chlorine | AZ0408035 | Resolved | Oct 1, 2025through Oct 31, 2025 |
| Chlorine | AZ0408041 | Resolved | Oct 1, 2025through Oct 31, 2025 |
| LEAD AND COPPER RULE REVISIONS | AZ0408041 | Unaddressed | Jul 2, 2025 |
| Arsenic | AZ0408081 | Resolved | Jul 1, 2025through Sep 30, 2025 |
| Arsenic | AZ0408035 | Resolved | Jul 1, 2025through Sep 30, 2025 |
| Consumer Confidence Rule | AZ0408082 | Resolved | Jul 1, 2025through Oct 15, 2025 |
| Arsenic | AZ0408081 | Resolved | Apr 1, 2025through Jun 30, 2025 |
| Revised Total Coliform Rule | AZ0408082 | Resolved | Apr 1, 2025through Apr 30, 2025 |
| Combined Uranium | AZ0408082 | Resolved | Apr 1, 2025through Jun 30, 2025 |
| Combined Radium (-226 and -228) | AZ0408082 | Resolved | Apr 1, 2025through Jun 30, 2025 |
| Arsenic | AZ0408082 | Resolved | Apr 1, 2025through Jun 30, 2025 |
| Groundwater RuleHealth-based | AZ0408081 | Unaddressed | Mar 15, 2025 |
| Public Notice | AZ0408038 | Resolved | Feb 20, 2025through Jan 22, 2026 |
| Public Notice | AZ0408038 | Resolved | Jan 26, 2025through Jan 22, 2026 |
| TTHM | AZ0408038 | Resolved | Jan 1, 2025through Nov 11, 2025 |
| Total Haloacetic Acids (HAA5) | AZ0408038 | Resolved | Jan 1, 2025through Nov 11, 2025 |
| Lead and Copper Rule | AZ0408035 | Resolved | Jan 1, 2025through Oct 24, 2025 |
| Arsenic | AZ0408035 | Resolved | Jan 1, 2025through Mar 31, 2025 |
| Chlorine | AZ0408035 | Resolved | Jan 1, 2025through Jan 31, 2025 |
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 Kingman ZIP 86409 using 306 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
306 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
Groundwater Rule 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 Kingman
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Kingman
Is tap water safe in Kingman?+
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 306 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 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.