Hardness
Very Hard
243 PPM · 14.2 GPG
Local water dashboard
Official source aggregationWater quality in Apache Junction, AZ 85120
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Pinal County.
1 active health-based violation
- Primary matched system
- Arizona Water Co - Apache Junction
- Source water
- Groundwater + Surface water
- County
- Pinal County
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
Review needed
1 active health-based record
Lead 90th percentile
0 mg/L
0% of action level
Utility match
4 systems
Serves 62,055 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
243 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
243
mg/L as CaCO₃ equivalent
Grains per gallon
14.2
1 GPG ≈ 17.1 PPM
What this means at home
At 243 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
35
Nearest site
24.2 mi
Observation range
Feb 28, 2018–Dec 18, 2024
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: A-02-04 21CCB (Well).USGS source documentation ↗
Regional context
Is 85120 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Apache Junction median
243 PPM
About the same2 indexed ZIP readings · Range 243–243 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, 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
EPA limit 0.015
TTHM
Measured in MG/L
Local 0.081
EPA limit 0.08
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 120
- Health-based
- 7
- Active health-based
- 1
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Chlorine | AZ0411708 | Resolved | Oct 1, 2025through Oct 31, 2025 |
| Lead and Copper Rule | AZ0411201 | Unaddressed | Oct 1, 2025 |
| Chlorite | AZ0411039 | Resolved | Sep 1, 2025through Sep 30, 2025 |
| Chlorite | AZ0411039 | Resolved | Sep 1, 2025through Sep 30, 2025 |
| Chlorine dioxide | AZ0411039 | Resolved | Sep 1, 2025through Sep 30, 2025 |
| Chlorine dioxide | AZ0411039 | Resolved | Sep 1, 2025through Sep 30, 2025 |
| Public Notice | AZ0411708 | Unaddressed | Jul 25, 2025 |
| Public Notice | AZ0411201 | Unaddressed | Jul 25, 2025 |
| Chlorite | AZ0411039 | Resolved | Jul 1, 2025through Jul 31, 2025 |
| Surface Water Treatment Rule | AZ0411039 | Resolved | May 1, 2025through May 31, 2025 |
| TTHMHealth-basedReported 0.081 MG/L · MCL 0.08 | AZ0411039 | Resolved | Apr 1, 2025through Jun 30, 2025 |
| Public Notice | AZ0411708 | Resolved | Dec 20, 2024through Jan 31, 2024 |
| Groundwater RuleHealth-based | AZ0411708 | Resolved | Nov 14, 2024through Feb 18, 2025 |
| LEAD AND COPPER RULE REVISIONS | AZ0411039 | Resolved | Oct 17, 2024through Feb 28, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | AZ0411039 | Resolved | Oct 17, 2024through Feb 28, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | AZ0411708 | Resolved | Oct 17, 2024through Dec 30, 2024 |
| LEAD AND COPPER RULE REVISIONS | AZ0411708 | Resolved | Oct 17, 2024through Dec 30, 2024 |
| CARBON, TOTAL | AZ0411039 | Resolved | Sep 1, 2024through Sep 30, 2024 |
| Chlorite | AZ0411039 | Resolved | Sep 1, 2024through Sep 30, 2024 |
| Chlorine dioxide | AZ0411039 | Resolved | Jun 1, 2024through Jun 30, 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 Apache Junction ZIP 85120 using 243 PPM nearby hardness and 2 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
243 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
TTHM 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 Apache Junction
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Apache Junction
Is tap water safe in Apache Junction?+
EPA ECHO reports 1 active health-based violation 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 243 PPM, or 14.2 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 243 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.