Hardness
Very Hard
501.5 PPM · 29.3 GPG
Local water dashboard
Official source aggregationWater quality in Quartzsite, AZ 85346
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for La Paz County.
No active health-based violation reported
- Primary matched system
- Quartzsite Town Of
- Source water
- Groundwater
- County
- La Paz 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
0.0099 mg/L
66% of action level
Utility match
4 systems
Serves 2,761 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
501.5 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
501.5
mg/L as CaCO₃ equivalent
Grains per gallon
29.3
1 GPG ≈ 17.1 PPM
What this means at home
At 501.5 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
90
Nearest site
25.5 mi
Observation range
Mar 8, 2016–Apr 9, 2026
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: 006S023E32E001S (Well).USGS source documentation ↗
Regional context
Is 85346 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Quartzsite median
502 PPM
About the same1 indexed ZIP readings · Range 501.5–501.5 PPM
Arizona median
241 PPM
261 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)
0.0099 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 0.0099
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 15
- Health-based
- 0
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Chlorine | AZ0415435 | Archived | Mar 1, 2026through Mar 31, 2026 |
| Chlorine | AZ0415435 | Archived | Feb 1, 2026through Feb 28, 2026 |
| Chlorine | AZ0415435 | Archived | Jan 1, 2026through Jan 31, 2026 |
| Lead and Copper Rule | AZ0415096 | Resolved | Jan 1, 2025through Mar 24, 2025 |
| Chlorine | AZ0415346 | Resolved | Jul 1, 2024through Jul 31, 2024 |
| Lead and Copper Rule | AZ0415346 | Resolved | Jan 1, 2024through Dec 11, 2024 |
| Chlorine | AZ0415346 | Resolved | Oct 1, 2023through Dec 31, 2023 |
| Lead and Copper Rule | AZ0415096 | Resolved | Oct 1, 2023through Oct 11, 2024 |
| Chlorine | AZ0415346 | Resolved | Apr 1, 2022through Jun 30, 2022 |
| Revised Total Coliform Rule | AZ0415096 | Resolved | Mar 1, 2022through Apr 21, 2022 |
| Revised Total Coliform Rule | AZ0415096 | Resolved | Dec 1, 2021through Feb 1, 2022 |
| Revised Total Coliform Rule | AZ0415435 | Resolved | Nov 1, 2021through Dec 29, 2021 |
| E. COLI | AZ0415346 | Resolved | Sep 24, 2021through Nov 3, 2021 |
| Revised Total Coliform Rule | AZ0415096 | Resolved | Jul 1, 2021through Sep 2, 2021 |
| Revised Total Coliform Rule | AZ0415096 | Resolved | Feb 1, 2021through Mar 12, 2021 |
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 Quartzsite ZIP 85346 using 501.5 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
501.5 PPM is 4× 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 systemsAffiliate 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 Quartzsite
Is tap water safe in Quartzsite?+
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 501.5 PPM, or 29.3 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 501.5 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.