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

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

Covington Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

river

pH Level

7.8

neutral = 7.0

Lead

0.004 mg/L

✓ Below action level

TDS

257.6 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 Covington, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Covington	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 Covington compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Covington, Kentucky	≈ 120–179 mg/L	4.6 ppt	🟠 Hard	river
Newport, Kentucky	≈ 120–179 mg/L	6.1 ppt	🟠 Hard	river
Cincinnati, Ohio	127 mg/L	4.7 ppt	🟠 Hard	river
Fort Thomas, Kentucky	≈ 120–179 mg/L	5.9 ppt	🟠 Hard	river
Norwood, Ohio	≈ 120–179 mg/L	0 ppt	🟠 Hard	river

National Benchmark

How Covington compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Covington	≈ 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 Covington's Water Unique?

Local geology and source profile

Source: RiverTDS: 257.6 mg/LpH: 7.8

Northern Kentucky Water District (NKWD) supplies drinking water to Covington in Kenton County, Kentucky, serving over 300,000 customers across Northern Kentucky. The primary sources are the Ohio River and Licking River, treated at the Lake Haywood Water Plant and the Ohio River Water Plant. NKWD gathers samples from over 155 locations and publishes annual Consumer Confidence Reports confirming compliance with EPA standards.

The Ohio River and Licking River watersheds span parts of Kentucky, Ohio, and West Virginia, with headwaters in the Appalachian region. The geology features Paleozoic sedimentary rocks, predominantly Ordovician and Silurian limestones and dolomites that dissolve calcium and magnesium into the surface water, yielding a hard supply. No groundwater aquifers are used; the supply chemistry reflects limestone weathering and agricultural runoff across the basin.

Hard water leads to scale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and lifespan. Soap lathering is less effective, and spots appear on glassware. Regular vinegar descaling and installing a water softener are recommended; hard conditions accelerate appliance wear and increase energy costs. NKWD water meets all EPA health standards; treatment includes coagulation, sedimentation, filtration, and chlorine disinfection. pH is reported around 7.5–8.5; disinfection byproducts are monitored and below MCLs, with no specific PFAS exceedances noted in available CCRs.

Geology & Source: Ohio River and Licking River watersheds — Appalachian Plateau; Upper Ordovician Eden Group and Cincinnatian Series limestones, Mississippian Borden Group limestones; karst bedrock dissolves calcium and magnesium, yielding hard water

Other Kentucky Water Reports

Newport

≈ 120–179 mg/L

🟠 Hard

Cincinnati

127 mg/L

🟠 Hard

Fort Thomas

≈ 120–179 mg/L

🟠 Hard

Norwood

≈ 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 Covington's water safe to drink?

Yes. Covington'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 Covington?

At ≈ 120–179 mg/L (Hard), Covington'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 Covington compare to the USA average?

The USA national average is 151 mg/L. Covington (≈ 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 Covington 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.