Hardness
Very Hard
283 PPM · 16.5 GPG
Local water dashboard
Official source aggregationA source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Coconino County.
At a glance
EPA quarter 2026Q2
Hardness
Very Hard
283 PPM · 16.5 GPG
Compliance screen
No active flag
0 active health-based records
Lead 90th percentile
0 mg/L
0% of action level
Utility match
1 system
Serves 1,270 people system-wide
Hardness meter
Estimated local hardness
USGS hardness classification scale
283 PPM
Parts per million
283
mg/L as CaCO₃ equivalent
Grains per gallon
16.5
1 GPG ≈ 17.1 PPM
What this means at home
At 283 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
63
Nearest site
13.9 mi
Observation range
Apr 22, 2016–May 20, 2025
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: 03 079-10.81X09.20 (Spring).USGS source documentation ↗
Regional context
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Cameron median
283 PPM
About the same1 indexed ZIP readings · Range 283–283 PPM
Arizona median
241 PPM
42 PPM higher285 indexed ZIP readings · Range 66.4–1250 PPM
EPA benchmark screen
Available numerical results from associated SDWIS community water systems, compared with the applicable action level or federal MCL. Federal measured-value coverage is incomplete.
Lead (PB90)
0 mg/L
Reported Dec 31, 2025
Copper (CU90)
1.91 mg/L
Reported Dec 31, 2021
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Measured in mg/L
Local 0
EPA limit 0.015
Measured in mg/L
Local 1.91
EPA limit 1.3
100% line = listed limit
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Total Haloacetic Acids (HAA5) | AZ0403006 | Unaddressed | Jan 1, 2026through Dec 31, 2026 |
| TTHM | AZ0403006 | Unaddressed | Jan 1, 2026through Dec 31, 2026 |
| Lead and Copper Rule | AZ0403006 | Resolved | Oct 1, 2025through Oct 17, 2025 |
| Public Notice | AZ0403006 | Resolved | Jul 2, 2025through Jul 23, 2025 |
| Consumer Confidence Rule | AZ0403006 | Resolved | Jul 1, 2025through Sep 24, 2025 |
| Public Notice | AZ0403006 | Resolved | Dec 20, 2024through Jul 23, 2025 |
| LEAD AND COPPER RULE REVISIONS | AZ0403006 | Resolved | Oct 17, 2024through Feb 12, 2026 |
| LEAD AND COPPER RULE REVISIONSHealth-based | AZ0403006 | Resolved | Oct 17, 2024through Feb 12, 2026 |
| Arsenic | AZ0403006 | Resolved | Oct 1, 2024through Dec 31, 2024 |
| Lead and Copper Rule | AZ0403006 | Resolved | Oct 1, 2024through Nov 18, 2024 |
| Chlorine | AZ0403006 | Resolved | Aug 1, 2024through Aug 31, 2024 |
| Public Notice | AZ0403006 | Resolved | Jul 2, 2024through Jul 23, 2025 |
| Lead and Copper Rule | AZ0403006 | Resolved | Apr 2, 2024through Nov 18, 2024 |
| Revised Total Coliform Rule | AZ0403006 | Resolved | Apr 1, 2024through Sep 13, 2024 |
| Arsenic | AZ0403006 | Resolved | Apr 1, 2024through Jun 30, 2024 |
| Public Notice | AZ0403006 | Resolved | Jan 2, 2024through Jul 23, 2025 |
| Public Notice | AZ0403006 | Resolved | Oct 2, 2023through Nov 22, 2023 |
| Public Notice | AZ0403006 | Resolved | Oct 2, 2023through Nov 22, 2023 |
| Public Notice | AZ0403006 | Resolved | Sep 2, 2023through Oct 20, 2023 |
| Public Notice | AZ0403006 | Resolved | Jul 29, 2023through Oct 20, 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
Matched to Cameron ZIP 86020 using 283 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
283 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
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
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.
Nearby USGS observations produce an estimate of 283 PPM, or 16.5 grains per gallon, classified as very hard. This is not a household tap measurement.
At 283 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.