Hardness
Very Hard
360 PPM · 21.1 GPG
Local water dashboard
Official source aggregationA source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Hillsborough County.
At a glance
EPA quarter 2026Q2
Hardness
Very Hard
360 PPM · 21.1 GPG
Compliance screen
No active flag
0 active health-based records
Lead 90th percentile
0.0054 mg/L
36% of action level
Utility match
10 systems
Serves 1,530 people system-wide
Hardness meter
Estimated local hardness
USGS hardness classification scale
360 PPM
Parts per million
360
mg/L as CaCO₃ equivalent
Grains per gallon
21.1
1 GPG ≈ 17.1 PPM
What this means at home
At 360 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
23
Nearest site
28.5 mi
Observation range
Jan 13, 2016–May 13, 2026
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: DUNEDIN WELL NO. 30 AAH0640 (Well).USGS source documentation ↗
Regional context
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Ruskin median
360 PPM
About the same1 indexed ZIP readings · Range 360–360 PPM
Florida median
280 PPM
80 PPM higher602 indexed ZIP readings · Range 20–374.5 PPM
EPA benchmark screen
Available numerical results from associated SDWIS community water systems, compared with the applicable action level or federal MCL. Federal measured-value coverage is incomplete.
Lead (PB90)
0.0054 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.
Measured in mg/L
Local 0.0054
EPA limit 0.015
100% line = listed limit
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| E. COLI | FL6290741 | Resolved | Jan 1, 2026through Jan 31, 2026 |
| Public Notice | FL6296291 | Resolved | Jul 1, 2025through Jul 30, 2025 |
| Public Notice | FL6296291 | Resolved | Mar 24, 2025through Aug 7, 2025 |
| Revised Total Coliform Rule | FL6296291 | Resolved | Jan 1, 2025through Jan 31, 2025 |
| Public Notice | FL6296291 | Resolved | Dec 18, 2024through Dec 20, 2024 |
| Public Notice | FL6295072 | Unaddressed | Nov 6, 2024 |
| Revised Total Coliform Rule | FL6290298 | Resolved | Nov 1, 2024through Nov 30, 2024 |
| E. COLI | FL6290298 | Resolved | Nov 1, 2024through Nov 30, 2024 |
| E. COLI | FL6291252 | Resolved | Nov 1, 2024through Nov 30, 2024 |
| Revised Total Coliform Rule | FL6291252 | Resolved | Nov 1, 2024through Nov 30, 2024 |
| E. COLI | FL6296291 | Resolved | Nov 1, 2024through Nov 30, 2024 |
| Revised Total Coliform Rule | FL6296291 | Resolved | Nov 1, 2024through Nov 30, 2024 |
| Revised Total Coliform Rule | FL6291524 | Resolved | Nov 1, 2024through Nov 30, 2024 |
| E. COLI | FL6291524 | Resolved | Nov 1, 2024through Nov 30, 2024 |
| Public Notice | FL6291252 | Resolved | Sep 5, 2024through Oct 25, 2024 |
| E. COLI | FL6296291 | Resolved | Sep 1, 2024through Sep 30, 2024 |
| Revised Total Coliform Rule | FL6296291 | Resolved | Sep 1, 2024through Sep 30, 2024 |
| Revised Total Coliform Rule | FL6291524 | Resolved | Jul 1, 2024through Jul 31, 2024 |
| E. COLI | FL6291252 | Resolved | Jun 1, 2024through Jun 30, 2024 |
| Revised Total Coliform Rule | FL6291252 | 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
Matched to Ruskin ZIP 33570 using 360 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
360 PPM is 3× 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
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.
Nearby USGS observations produce an estimate of 360 PPM, or 21.1 grains per gallon, classified as very hard. This is not a household tap measurement.
At 360 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.