Hardness
Very Hard
390 PPM · 22.8 GPG
Local water dashboard
Official source aggregationWater quality in Yuma, AZ 85364
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Yuma County.
10 active health-based violations
- Primary matched system
- City Of Yuma
- Source water
- Surface water + Groundwater
- County
- Yuma County
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
Review needed
10 active health-based records
Lead 90th percentile
0 mg/L
0% of action level
Utility match
10 systems
Serves 103,264 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
390 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
390
mg/L as CaCO₃ equivalent
Grains per gallon
22.8
1 GPG ≈ 17.1 PPM
What this means at home
At 390 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
42
Nearest site
2 mi
Observation range
Jan 12, 2016–Jun 10, 2026
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: SHAW FLOORING OUTFALL (Stream).USGS source documentation ↗
Regional context
Is 85364 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Yuma median
390 PPM
About the same2 indexed ZIP readings · Range 390–390 PPM
Arizona median
241 PPM
149 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 pass4 fail
Lead (PB90)
0 mg/L
Reported Dec 31, 2025
Copper (CU90)
2.7 mg/L
Reported Dec 31, 2019
Numerical coverage
5 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 2.7
EPA limit 1.3
Combined Uranium
Measured in UG/L
Local 35
EPA limit 30
Arsenic
Measured in MG/L
Local 0.027
EPA limit 0.01
Chlorine dioxide
Measured in MG/L
Local 1
EPA limit 0.8
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 640
- Health-based
- 112
- Active health-based
- 10
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Revised Total Coliform Rule | AZ0414099 | Archived | Feb 1, 2026through Feb 28, 2026 |
| Combined UraniumHealth-basedReported 35 UG/L · MCL 30 | AZ0414080 | Archived | Jan 1, 2026through Mar 31, 2026 |
| ArsenicHealth-basedReported 0.027 MG/L · MCL 0.01 | AZ0414442 | Archived | Jan 1, 2026through Mar 31, 2026 |
| Lead and Copper Rule | AZ0414039 | Resolved | Jan 1, 2026through Mar 12, 2026 |
| Lead and Copper Rule | AZ0414095 | Unaddressed | Jan 1, 2026 |
| Combined UraniumHealth-basedReported 40 UG/L · MCL 30 | AZ0414075 | Archived | Jan 1, 2026through Mar 31, 2026 |
| Combined UraniumHealth-basedReported 32 UG/L · MCL 30 | AZ0414073 | Archived | Jan 1, 2026through Mar 31, 2026 |
| Lead and Copper Rule | AZ0414070 | Unaddressed | Jan 1, 2026 |
| Chlorine | AZ0414463 | Resolved | Dec 1, 2025through Dec 31, 2025 |
| Public Notice | AZ0414322 | Unaddressed | Nov 15, 2025 |
| Public Notice | AZ0414463 | Unaddressed | Nov 15, 2025 |
| Public Notice | AZ0414391 | Resolved | Nov 15, 2025through Jan 27, 2026 |
| Chlorine | AZ0414463 | Resolved | Nov 1, 2025through Nov 30, 2025 |
| Public Notice | AZ0414070 | Resolved | Oct 18, 2025through Jan 23, 2026 |
| Consumer Confidence Rule | AZ0414082 | Resolved | Oct 2, 2025through Dec 17, 2025 |
| Consumer Confidence Rule | AZ0414098 | Unaddressed | Oct 2, 2025 |
| Consumer Confidence Rule | AZ0414322 | Unaddressed | Oct 2, 2025 |
| Consumer Confidence Rule | AZ0414075 | Resolved | Oct 2, 2025through Feb 4, 2026 |
| Consumer Confidence Rule | AZ0414086 | Unaddressed | Oct 2, 2025 |
| Consumer Confidence Rule | AZ0414070 | Resolved | Oct 2, 2025through Jan 23, 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 Yuma ZIP 85364 using 390 PPM nearby hardness and 5 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
390 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
Copper (90th percentile), Combined Uranium, Arsenic, Chlorine dioxide have 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 Yuma
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Yuma
Is tap water safe in Yuma?+
EPA ECHO reports 10 active health-based violations 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 390 PPM, or 22.8 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 390 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.