How does Oviedo's water compare to the national average?

The USA national average is 151 mg/L. Oviedo (≈ 120–179 mg/L) is 1 mg/L softer than average.

Oviedo Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

groundwater

pH Level

7.9

neutral = 7.0

Lead

0.003 mg/L

✓ Below action level

TDS

380.8 mg/L

Est. Daily Cost

$0.40

energy & soap waste

Source: See methodology section below · Updated 2026

hard~120–179 mg/LHard · est.

0–60

mg/L

Soft

61–120

mg/L

Moderately Hard

121–180

mg/L

Hard

180+

mg/L

Very Hard

Appliance Damage Report

In Oviedo, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Oviedo	Soft Water City	Efficiency Loss
Kettle	6.8 yrs	8.5 yrs	-20%
Washing Machine	9.6 yrs	12 yrs	-20%
Water Heater	12 yrs	15 yrs	-20%

Regional Water Comparison

How Oviedo compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Oviedo, Florida	≈ 120–179 mg/L	0 ppt	🟠 Hard	groundwater
Goldenrod, Florida	≈ 120–179 mg/L	7 ppt	🟠 Hard	groundwater
Winter Springs, Florida	≈ 120–179 mg/L	10.1 ppt	🟠 Hard	groundwater
Alafaya, Florida	≈ 120–179 mg/L	7.9 ppt	🟠 Hard	groundwater
Casselberry, Florida	≈ 120–179 mg/L	3.2 ppt	🟠 Hard	groundwater

National Benchmark

How Oviedo compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Oviedo	≈ 120–179 mg/L	🟠 Moderate
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

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What Makes Oviedo's Water Unique?

Local geology and source profile

Source: GroundwaterTDS: 380.8 mg/LpH: 7.9

The City of Oviedo Utilities Department provides water service to the Oviedo area in Seminole County, Florida. The utility draws its supply exclusively from the Floridian Aquifer, a major groundwater resource underlying central Florida. Operations are managed from 400 Alexandria Boulevard, Oviedo, Florida 32765, and the utility publishes an annual Water Quality Report (Consumer Confidence Report) documenting regulated contaminants, treatment processes, and compliance status. Residents may reach the utility at 407-971-5555 or contact Utilities Manager Steve Santiago at 407-971-5657 for detailed technical information.

Oviedo's water originates from the Floridian Aquifer, composed of limestone and dolomite formations deposited during the Tertiary Period. This carbonate-rich geology is characteristic of Florida's karst landscape, where groundwater percolating through the limestone layers dissolves calcium and magnesium compounds over time. The aquifer's mineral-rich bedrock is the primary driver of the water's hardness profile, naturally producing elevated concentrations of dissolved minerals that define the supply as moderately hard.

Moderately hard water in Oviedo causes noticeable mineral scale buildup on fixtures and appliances over time. Water heaters, dishwashers, and washing machines are particularly susceptible, with scale accumulation reducing efficiency and shortening appliance lifespan. The City of Oviedo recommends that residents consider installing water softeners and purifiers to minimize mineral deposits, improve taste, and optimize water quality for those sensitive to hardness. Periodic descaling and regular appliance maintenance are practical mitigation strategies. Oviedo's tap water complies with all federal and state safety regulations and is considered safe for daily use.

Geology & Source: Floridian Aquifer, central Florida karst; Tertiary limestone and dolomite formations; carbonate dissolution elevates calcium and magnesium — produces moderately hard groundwater

Other Florida Water Reports

Goldenrod

≈ 120–179 mg/L

🟠 Hard

Winter Springs

≈ 120–179 mg/L

🟠 Hard

Alafaya

≈ 120–179 mg/L

🟠 Hard

Casselberry

≈ 120–179 mg/L

🟠 Hard

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Notice an error or missing data? Help us keep this page accurate. If you spot incorrect water hardness, outdated utility info, or missing details, please let us know.

All reports are reviewed by our team. Thank you for supporting data quality!

Frequently Asked Questions

Is Oviedo's water safe to drink?

Yes. Oviedo's water meets all federal safety standards. The hardness is ≈ 120–179 mg/L (Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Oviedo?

At ≈ 120–179 mg/L (Hard), Oviedo's water will cause significant limescale on kettles, washing machines, and water heaters. A water softener or descaler is strongly recommended to extend appliance lifespan and reduce energy bills by up to 20%.

How does Oviedo compare to the USA average?

The USA national average is 151 mg/L. Oviedo (≈ 120–179 mg/L) is 1 mg/L below the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for Oviedo is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.

Estimated

Water Hardness

Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.

Estimated

Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.

Estimated

TDS — Total Dissolved Solids

Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.

Measured

PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances

EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.

Modelled

Lead

Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.

Calculated

Appliance Lifespan

Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.