Hardness
Very Hard
232.5 PPM · 13.6 GPG
Local water dashboard
Official source aggregationWater quality in Jacksonville, FL 32203
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Duval County.
2 active health-based violations
- Primary matched system
- Jea Major Grid
- Source water
- Groundwater
- County
- Duval County
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
Review needed
2 active health-based records
Lead 90th percentile
0.001 mg/L
7% of action level
Utility match
10 systems
Serves 826,664 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
232.5 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
232.5
mg/L as CaCO₃ equivalent
Grains per gallon
13.6
1 GPG ≈ 17.1 PPM
What this means at home
At 232.5 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
16.9 mi
Observation range
Dec 6, 2016–Jan 15, 2026
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: GAFL SUS4 2IN DOMESTIC 610FT WELL NR CALLAHAN, FL (Well).USGS source documentation ↗
Regional context
Is 32203 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Jacksonville median
238 PPM
5 PPM lower34 indexed ZIP readings · Range 232.5–241.5 PPM
Florida median
280 PPM
47 PPM lower602 indexed ZIP readings · Range 20–374.5 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)
0.001 mg/L
Reported Dec 1, 2025
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 0.001
EPA limit 0.015
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 44
- Health-based
- 2
- Active health-based
- 2
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| E. COLI | FL2160734 | Resolved | Aug 1, 2025through Oct 3, 2025 |
| Consumer Confidence Rule | FL2160568 | Unaddressed | Jul 1, 2025 |
| Consumer Confidence Rule | FL2160390 | Resolved | Jul 1, 2025through Oct 29, 2025 |
| Consumer Confidence Rule | FL2160824 | Resolved | Jul 1, 2025through Nov 4, 2025 |
| Revised Total Coliform Rule | FL2164003 | Resolved | Jun 1, 2025through Jun 30, 2025 |
| E. COLI | FL2164003 | Resolved | Jun 1, 2025through Jun 30, 2025 |
| E. COLI | FL2160254 | Resolved | Apr 1, 2025through Apr 30, 2025 |
| Revised Total Coliform Rule | FL2160254 | Resolved | Apr 1, 2025through Apr 30, 2025 |
| LEAD AND COPPER RULE REVISIONS | FL2160824 | Unaddressed | Feb 1, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | FL2160824 | Unaddressed | Feb 1, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | FL2161337 | Unaddressed | Feb 1, 2025 |
| LEAD AND COPPER RULE REVISIONS | FL2161337 | Unaddressed | Feb 1, 2025 |
| Revised Total Coliform Rule | FL2160654 | Resolved | Jan 1, 2025through Jan 31, 2025 |
| E. COLI | FL2160654 | Resolved | Jan 1, 2025through Jan 31, 2025 |
| Total Haloacetic Acids (HAA5) | FL2160654 | Archived | Jan 1, 2025through Mar 31, 2025 |
| TTHM | FL2160654 | Archived | Jan 1, 2025through Mar 31, 2025 |
| E. COLI | FL2550908 | Resolved | Dec 1, 2024through Dec 30, 2024 |
| Revised Total Coliform Rule | FL2550908 | Resolved | Dec 1, 2024through Dec 30, 2024 |
| E. COLI | FL2161328 | Resolved | Nov 1, 2024through Dec 3, 2024 |
| E. COLI | FL2161328 | Resolved | Nov 1, 2024through Dec 3, 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 Jacksonville ZIP 32203 using 232.5 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
232.5 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
LEAD AND COPPER RULE REVISIONS 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 Jacksonville
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Jacksonville
Is tap water safe in Jacksonville?+
EPA ECHO reports 2 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 232.5 PPM, or 13.6 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 232.5 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.