Hardness
Very Hard
261.5 PPM · 15.3 GPG
Local water dashboard
Official source aggregationWater quality in Chandler, AZ 85249
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Maricopa County.
1 reported benchmark flag
- Primary matched system
- Chandler City Of
- Source water
- Surface water + Groundwater
- County
- Maricopa 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
0.0014 mg/L
9% of action level
Utility match
6 systems
Serves 247,328 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
261.5 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
261.5
mg/L as CaCO₃ equivalent
Grains per gallon
15.3
1 GPG ≈ 17.1 PPM
What this means at home
At 261.5 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
28
Nearest site
16.6 mi
Observation range
Jan 4, 2016–May 29, 2026
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: 40th Street and the Salt River at Phoenix, Az. (Stream).USGS source documentation ↗
Regional context
Is 85249 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Chandler median
228 PPM
34 PPM higher6 indexed ZIP readings · Range 208–261.5 PPM
Arizona median
241 PPM
21 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 pass1 fail
Lead (PB90)
0.0014 mg/L
Reported Dec 31, 2025
Copper (CU90)
Not available
No numerical 90th-percentile result
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0.0014
EPA limit 0.015
Arsenic
Measured in MG/L
Local 0.012
EPA limit 0.01
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 119
- Health-based
- 6
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Chlorine | AZ0407409 | Archived | Jan 1, 2026through Jan 31, 2026 |
| Revised Total Coliform Rule | AZ0407492 | Resolved | Jan 1, 2026through Mar 9, 2026 |
| Revised Total Coliform Rule | AZ0407492 | Unaddressed | Dec 1, 2025 |
| Revised Total Coliform Rule | AZ0407492 | Unaddressed | Nov 1, 2025 |
| Consumer Confidence Rule | AZ0407409 | Unaddressed | Oct 2, 2025 |
| Consumer Confidence Rule | AZ0407671 | Resolved | Oct 2, 2025through Jun 29, 2025 |
| Consumer Confidence Rule | AZ0407903 | Unaddressed | Oct 2, 2025 |
| Lead and Copper Rule | AZ0407120 | Unaddressed | Oct 1, 2025 |
| Revised Total Coliform Rule | AZ0407492 | Resolved | Oct 1, 2025through Oct 31, 2025 |
| LEAD AND COPPER RULE REVISIONS | AZ0407120 | Unaddressed | Jul 2, 2025 |
| LEAD AND COPPER RULE REVISIONS | AZ0407409 | Unaddressed | Jul 2, 2025 |
| LEAD AND COPPER RULE REVISIONS | AZ0407492 | Unaddressed | Jul 2, 2025 |
| Consumer Confidence Rule | AZ0407409 | Unaddressed | Jul 1, 2025 |
| ArsenicHealth-basedReported 0.012 MG/L · MCL 0.01 | AZ0407492 | Resolved | Apr 1, 2025through Jun 30, 2025 |
| ArsenicHealth-basedReported 0.012 MG/L · MCL 0.01 | AZ0407492 | Resolved | Jan 1, 2025through Mar 31, 2025 |
| Lead and Copper Rule | AZ0407492 | Resolved | Jan 1, 2025through Jun 14, 2025 |
| Nitrate | AZ0407090 | Resolved | Oct 1, 2024through Dec 31, 2024 |
| ArsenicHealth-basedReported 0.011 MG/L · MCL 0.01 | AZ0407492 | Resolved | Oct 1, 2024through Dec 31, 2024 |
| Revised Total Coliform Rule | AZ0407120 | Resolved | Sep 1, 2024through Sep 30, 2024 |
| E. COLI | AZ0407120 | Unaddressed | Aug 22, 2024 |
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 Chandler ZIP 85249 using 261.5 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
261.5 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
Arsenic 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 Chandler
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Chandler
Is tap water safe in Chandler?+
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 261.5 PPM, or 15.3 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 261.5 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.