Hardness
Very Hard
363.5 PPM · 21.3 GPG
Local water dashboard
Official source aggregationWater quality in Oviedo, FL 32766
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Seminole County.
2 reported benchmark flags
- Primary matched system
- Oviedo, City Of
- Source water
- Groundwater
- County
- Seminole 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 mg/L
0% of action level
Utility match
4 systems
Serves 47,933 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
363.5 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
363.5
mg/L as CaCO₃ equivalent
Grains per gallon
21.3
1 GPG ≈ 17.1 PPM
What this means at home
At 363.5 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
72
Nearest site
7.5 mi
Observation range
May 9, 2016–May 27, 2026
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: BITHLO 2 WELL AT BITHLO, FL (Well).USGS source documentation ↗
Regional context
Is 32766 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Oviedo median
364 PPM
About the same1 indexed ZIP readings · Range 363.5–363.5 PPM
Florida median
280 PPM
84 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 pass2 fail
Lead (PB90)
0 mg/L
Reported Dec 1, 2024
Copper (CU90)
1.5 mg/L
Reported Jun 30, 1993
Numerical coverage
3 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
Copper (90th percentile)
Measured in mg/L
Local 1.5
EPA limit 1.3
TTHM
Measured in UG/L
Local 93
EPA limit 0.08
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 6
- Health-based
- 2
- Active health-based
- 0
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Revised Total Coliform Rule | FL3590970 | Archived | Feb 1, 2026through Feb 28, 2026 |
| Revised Total Coliform Rule | FL3590970 | Archived | Aug 1, 2025through Aug 31, 2025 |
| Revised Total Coliform Rule | FL3590970 | Archived | Apr 1, 2025through Apr 30, 2025 |
| TTHMHealth-basedReported 93 UG/L · MCL 0.08 | FL3590988 | Resolved | Apr 1, 2023through Jun 30, 2023 |
| TTHMHealth-basedReported 86.685 UG/L · MCL 0.08 | FL3590988 | Resolved | Jan 1, 2023through Mar 31, 2023 |
| Lead and Copper Rule | FL3594241 | Unaddressed | Jan 1, 2017 |
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 Oviedo ZIP 32766 using 363.5 PPM nearby hardness and 3 reported measurement benchmarks.
Scale protection
High-Capacity Whole House Water Softener
363.5 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 systemsDrinking water protection
Under-Sink Reverse Osmosis System
Copper (90th percentile), TTHM have 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 Oviedo
Is tap water safe in Oviedo?+
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 363.5 PPM, or 21.3 grains per gallon, classified as very hard. This is not a household tap measurement.
Do I need a water softener?+
At 363.5 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.