Hardness
Very Hard
241 PPM · 14.1 GPG
Local water dashboard
Official source aggregationWater quality in Prescott, AZ 86301
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Yavapai County.
1 reported benchmark flag
- Primary matched system
- Prescott City Of
- Source water
- Groundwater
- County
- Yavapai 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 mg/L
0% of action level
Utility match
10 systems
Serves 42,217 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
241 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
241
mg/L as CaCO₃ equivalent
Grains per gallon
14.1
1 GPG ≈ 17.1 PPM
What this means at home
At 241 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
31
Nearest site
12.5 mi
Observation range
Jun 27, 2016–May 1, 2024
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: B-16-01 07CBD1 (Well).USGS source documentation ↗
Regional context
Is 86301 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Prescott median
241 PPM
About the same3 indexed ZIP readings · Range 241–245 PPM
Arizona median
241 PPM
About the same285 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 mg/L
Reported Dec 31, 2026
Copper (CU90)
2.08 mg/L
Reported Dec 31, 2016
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
EPA limit 0.015
Copper (90th percentile)
Measured in mg/L
Local 2.08
EPA limit 1.3
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 129
- Health-based
- 3
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Chlorine | AZ0413044 | Archived | Feb 1, 2026through Feb 28, 2026 |
| Chlorine | AZ0413034 | Archived | Feb 1, 2026through Feb 28, 2026 |
| Lead and Copper Rule | AZ0413030 | Resolved | Jan 1, 2026through Mar 25, 2026 |
| Public Notice | AZ0413155 | Unaddressed | Nov 26, 2025 |
| Public Notice | AZ0413258 | Unaddressed | Nov 16, 2025 |
| Public Notice | AZ0413034 | Resolved | Nov 13, 2025through Jan 13, 2026 |
| Public Notice | AZ0413150 | Unaddressed | Nov 13, 2025 |
| Public Notice | AZ0413044 | Unaddressed | Oct 4, 2025 |
| Consumer Confidence Rule | AZ0413141 | Unaddressed | Oct 2, 2025 |
| Consumer Confidence Rule | AZ0413150 | Resolved | Oct 2, 2025through Jan 15, 2026 |
| Consumer Confidence Rule | AZ0413030 | Resolved | Oct 2, 2025through Oct 27, 2025 |
| E. COLI | AZ0413044 | Resolved | Aug 20, 2025through Sep 22, 2025 |
| LEAD AND COPPER RULE REVISIONS | AZ0413045 | Unaddressed | Jul 2, 2025 |
| LEAD AND COPPER RULE REVISIONS | AZ0413017 | Unaddressed | Jul 2, 2025 |
| LEAD AND COPPER RULE REVISIONS | AZ0413155 | Resolved | Jul 2, 2025through Mar 4, 2026 |
| LEAD AND COPPER RULE REVISIONS | AZ0413141 | Resolved | Jul 2, 2025through Feb 25, 2026 |
| LEAD AND COPPER RULE REVISIONS | AZ0413303 | Resolved | Jul 2, 2025through Mar 11, 2026 |
| LEAD AND COPPER RULE REVISIONS | AZ0413029 | Unaddressed | Jul 2, 2025 |
| LEAD AND COPPER RULE REVISIONS | AZ0413043 | Resolved | Jul 2, 2025through Mar 2, 2026 |
| LEAD AND COPPER RULE REVISIONS | AZ0413036 | Resolved | Jul 2, 2025through Jan 29, 2026 |
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 Prescott ZIP 86301 using 241 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
241 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
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.
Nearby indexed reports
Compare ZIPs in Prescott
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Prescott
Is tap water safe in Prescott?+
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 241 PPM, or 14.1 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 241 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.