Hardness
Moderately Hard
107 PPM · 6.3 GPG
Local water dashboard
Official source aggregationWater quality in Strong, AR 71765
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Union County.
1 active health-based violation
- Primary matched system
- Strong Waterworks
- Source water
- Groundwater
- County
- Union 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
0.008 mg/L
53% of action level
Utility match
1 system
Serves 1,131 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
107 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
107
mg/L as CaCO₃ equivalent
Grains per gallon
6.3
1 GPG ≈ 17.1 PPM
What this means at home
At 107 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
19
Nearest site
10.9 mi
Observation range
Aug 23, 2016–Aug 9, 2023
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: 19S11W25AAB2 (Well).USGS source documentation ↗
Regional context
Is 71765 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Strong median
107 PPM
About the same1 indexed ZIP readings · Range 107–107 PPM
Arkansas median
71 PPM
36 PPM higher210 indexed ZIP readings · Range 4.8–283 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)
0.008 mg/L
Reported Dec 31, 2003
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 0.008
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 11
- Health-based
- 1
- Active health-based
- 1
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Revised Total Coliform Rule | AR0000556 | Resolved | Nov 1, 2025through Nov 30, 2025 |
| Consumer Confidence Rule | AR0000556 | Unaddressed | Jul 1, 2025 |
| Revised Total Coliform Rule | AR0000556 | Resolved | Sep 1, 2023through Feb 7, 2024 |
| Revised Total Coliform Rule | AR0000556 | Resolved | Jul 1, 2022through Jul 31, 2022 |
| Public Notice | AR0000556 | Resolved | Jun 1, 2022through Aug 26, 2022 |
| Public Notice | AR0000556 | Resolved | Oct 1, 2021through Nov 14, 2024 |
| Consumer Confidence Rule | AR0000556 | Resolved | Jul 1, 2021through Aug 26, 2022 |
| Revised Total Coliform Rule | AR0000556 | Resolved | May 1, 2021through Feb 7, 2024 |
| Revised Total Coliform Rule | AR0000556 | Resolved | Apr 1, 2021through Feb 7, 2024 |
| Revised Total Coliform Rule | AR0000556 | Addressed | Dec 1, 2019 |
| Stage 1 Disinfectants and Disinfection Byproducts RuleHealth-based | AR0000556 | Unaddressed | Jan 1, 2016 |
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 Strong ZIP 71765 using 107 PPM nearby hardness and 1 reported measurement benchmarks.
Drinking water protection
Under-Sink Reverse Osmosis System
Stage 1 Disinfectants and Disinfection Byproducts Rule 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
Water questions for Strong
Is tap water safe in Strong?+
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 107 PPM, or 6.3 grains per gallon, classified as moderately hard. This is not a household tap measurement.
Do I need a water softener?+
There is no high-hardness trigger in this profile. Confirm with a tap test before buying equipment.