Hardness
Very Hard
341 PPM · 19.9 GPG
Local water dashboard
Official source aggregationWater quality in Port St. Lucie, FL 34945
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for St. Lucie County.
No active health-based violation reported
- Primary matched system
- St. Lucie West Services District
- Source water
- Groundwater
- County
- St. Lucie 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
0.001 mg/L
7% of action level
Utility match
1 system
Serves 21,400 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
341 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
341
mg/L as CaCO₃ equivalent
Grains per gallon
19.9
1 GPG ≈ 17.1 PPM
What this means at home
At 341 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
73
Nearest site
11.4 mi
Observation range
May 9, 2016–May 26, 2026
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: Reserve SA Well 5 (Well).USGS source documentation ↗
Regional context
Is 34945 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Port St. Lucie median
302 PPM
39 PPM higher7 indexed ZIP readings · Range 297–341 PPM
Florida median
280 PPM
61 PPM higher602 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, 2023
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
- 29
- Health-based
- 0
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Revised Total Coliform Rule | FL4565031 | Archived | Dec 1, 2025through Dec 31, 2025 |
| E. COLI | FL4565031 | Archived | Dec 1, 2025through Dec 31, 2025 |
| E. COLI | FL4565031 | Archived | Sep 1, 2025through Sep 30, 2025 |
| E. COLI | FL4565031 | Resolved | Jul 1, 2025through Jul 31, 2025 |
| Consumer Confidence Rule | FL4565031 | Unaddressed | Jul 1, 2025 |
| Revised Total Coliform Rule | FL4565031 | Resolved | Jul 1, 2025through Jul 31, 2025 |
| E. COLI | FL4565031 | Resolved | Apr 1, 2025through Apr 30, 2025 |
| E. COLI | FL4565031 | Resolved | Jan 1, 2025through Jan 31, 2025 |
| Revised Total Coliform Rule | FL4565031 | Resolved | Jan 1, 2025through Jan 31, 2025 |
| Revised Total Coliform Rule | FL4565031 | Resolved | Dec 1, 2024through Dec 31, 2024 |
| E. COLI | FL4565031 | Resolved | Dec 1, 2024through Dec 31, 2024 |
| E. COLI | FL4565031 | Resolved | Nov 1, 2024through Nov 30, 2024 |
| Revised Total Coliform Rule | FL4565031 | Resolved | Nov 1, 2024through Nov 30, 2024 |
| Revised Total Coliform Rule | FL4565031 | Resolved | Oct 1, 2024through Oct 31, 2024 |
| E. COLI | FL4565031 | Resolved | Oct 1, 2024through Oct 31, 2024 |
| E. COLI | FL4565031 | Resolved | Sep 1, 2024through Sep 30, 2024 |
| Revised Total Coliform Rule | FL4565031 | Resolved | Sep 1, 2024through Sep 30, 2024 |
| Revised Total Coliform Rule | FL4565031 | Resolved | Jul 1, 2024through Jul 31, 2024 |
| E. COLI | FL4565031 | Resolved | Jul 1, 2024through Jul 31, 2024 |
| E. COLI | FL4565031 | 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 Port St. Lucie ZIP 34945 using 341 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
341 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.
Nearby indexed reports
Compare ZIPs in Port St. Lucie
Estimates can differ across a city because monitoring locations and associated systems differ.
Frequently asked
Water questions for Port St. Lucie
Is tap water safe in Port St. Lucie?+
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 341 PPM, or 19.9 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 341 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.