How does Coral Terrace's water compare to the national average?

The USA national average is 151 mg/L. Coral Terrace (≈ 180+ mg/L) is 189 mg/L harder than average.

Coral Terrace Water Hardness & Quality Report (2026)

Water Hardness

very hard

180+ mg/L

Very Hard

estimated · not lab-verified

Source

groundwater

pH Level

7.9

neutral = 7.0

Lead

0.004 mg/L

✓ Below action level

TDS

398.8 mg/L

Est. Daily Cost

$0.91

energy & soap waste

Source: See methodology section below · Updated 2026

very hard180+ mg/LVery Hard · 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 Coral Terrace, your appliances are currently losing 45% efficiency due to mineral buildup.

Appliance	In Coral Terrace	Soft Water City	Efficiency Loss
Kettle	4.7 yrs	8.5 yrs	-45%
Washing Machine	6.6 yrs	12 yrs	-45%
Water Heater	8.3 yrs	15 yrs	-45%

Regional Water Comparison

How Coral Terrace compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Coral Terrace, Florida	≈ 180+ mg/L	7.4 ppt	🔴 Very Hard	groundwater
Flagami, Florida	≈ 120–179 mg/L	10.7 ppt	🟠 Hard	groundwater
Westchester, Florida	≈ 120–179 mg/L	8.2 ppt	🟠 Hard	groundwater
South Miami, Florida	≈ 120–179 mg/L	10.4 ppt	🟠 Hard	groundwater
Coral Gables, Florida	≈ 180+ mg/L	7.3 ppt	🔴 Very Hard	groundwater

National Benchmark

How Coral Terrace compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Coral Terrace	≈ 180+ mg/L	🔴 High
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

Bring Scarsdale-quality water to your Coral Terrace home

Shop water softeners on Amazon.com →

Shop Now

What Makes Coral Terrace's Water Unique?

Local geology and source profile

Source: GroundwaterTDS: 398.8 mg/LpH: 7.9

Coral Terrace, Florida is served by the Miami-Dade Water and Sewer Department (WASD), the primary municipal utility for unincorporated areas in Miami-Dade County. Water is sourced entirely from groundwater wells tapping the Biscayne Aquifer and upper Floridan Aquifer System, treated at facilities including the Alexander Orr Jr. Water Treatment Plant and Hialeah Water Treatment Plant through aeration, lime softening, filtration, and disinfection. The service area covers Coral Terrace and surrounding communities in southwest Miami-Dade County.

The supply draws from the local recharge area of the Biscayne Aquifer, a shallow unconfined aquifer extending across south Florida under Miami-Dade, Broward, and Palm Beach counties. Key rock formations include the Miami Limestone (Pleistocene) and Fort Thompson Formation, overlying deeper Eocene–Oligocene limestones of the Floridan Aquifer. This karst geology — characterized by solution channels and high permeability — allows rainwater to rapidly dissolve calcium and magnesium from carbonate bedrock, producing distinctly hard, mineral-rich groundwater.

Very hard water in Coral Terrace causes significant scale buildup in water heaters, dishwashers, coffee makers, and washing machines, reducing efficiency and lifespan. Regular vinegar descaling or citric acid rinses are recommended, and a whole-house water softener is strongly advised. Miami-Dade WASD maintains EPA compliance; pH is adjusted to 7.5–8.5 during lime softening, and corrosion control via orthophosphate addition keeps lead and copper well below action limits.

Geology & Source: Biscayne and Floridan Aquifer systems; Miami Limestone (Pleistocene), Fort Thompson Formation, Eocene–Oligocene limestones — karst carbonate geology dissolves calcium and magnesium; hard groundwater supply

Other Florida Water Reports

Flagami

≈ 120–179 mg/L

🟠 Hard

Westchester

≈ 120–179 mg/L

🟠 Hard

South Miami

≈ 120–179 mg/L

🟠 Hard

Coral Gables

≈ 180+ mg/L

🔴 Very Hard

Report an Issue

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 Coral Terrace's water safe to drink?

Yes. Coral Terrace's water meets all federal safety standards. The hardness is ≈ 180+ mg/L (Very Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Coral Terrace?

At ≈ 180+ mg/L (Very Hard), Coral Terrace'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 45%.

How does Coral Terrace compare to the USA average?

The USA national average is 151 mg/L. Coral Terrace (≈ 180+ mg/L) is 189 mg/L above the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for Coral Terrace 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.