Klamath Falls Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

groundwater

pH Level

8.4

neutral = 7.0

Lead

0.009 mg/L

✓ Below action level

TDS

273.7 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 Klamath Falls, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Klamath Falls	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 Klamath Falls compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Klamath Falls, Oregon	≈ 120–179 mg/L	31.2 ppt	🟠 Hard	groundwater
Altamont, Oregon	≈ 0–60 mg/L	2.1 ppt	🟢 Soft	reservoir
Ashland, Oregon	≈ 0–60 mg/L	0 ppt	🟢 Soft	reservoir
Medford, Oregon	≈ 60–120 mg/L	0 ppt	🟡 Moderately Hard	reservoir
Central Point, Oregon	≈ 0–60 mg/L	0 ppt	🟢 Soft	reservoir

National Benchmark

How Klamath Falls compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Klamath Falls	≈ 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 Klamath Falls's Water Unique?

Local geology and source profile

Source: GroundwaterTDS: 273.7 mg/LpH: 8.4

The City of Klamath Falls Water Utility serves Klamath County in south-central Oregon. The utility sources water from the Lost River and Upper Klamath Lake, treating it at municipal facilities before distribution. The system routinely monitors over 125 regulated and unregulated contaminants across all water sources and consistently meets or exceeds Federal and State drinking water standards. Contact: 541-883-5388; detailed annual water quality reports including the 2024 Consumer Confidence Report are published at klamathfalls.city.

The Klamath Falls water supply originates in the Upper Klamath Lake watershed, situated within the Cascade Range foothills of south-central Oregon. Local geology comprises primarily Tertiary volcanic rocks and basalts interspersed with sedimentary formations. This volcanic and sedimentary composition contributes moderate levels of dissolved calcium and magnesium, resulting in a moderately hard supply. The region's volcanic character also produces naturally low pH, low alkalinity, and elevated conductivity characteristic of the area.

At the moderately hard classification, Klamath Falls water will cause some mineral buildup in pipes and appliances over time, though treatment is not strictly essential. Households may notice soap scum, reduced detergent effectiveness, and gradual scale accumulation in water heaters and dishwashers. A water softener is recommended for those seeking to reduce these effects and extend appliance lifespan, though many residents manage without treatment. Regular descaling of kettles and periodic flushing of water heaters can mitigate mineral deposits; the utility's 30-plus years of continuous water quality monitoring confirms safe, compliant water.

Geology & Source: Lost River and Upper Klamath Lake watershed; Cascade Range foothills Tertiary volcanic rocks and basalts with sedimentary formations yield moderate hardness with low pH and high conductivity

Other Oregon Water Reports

Altamont

≈ 0–60 mg/L

🟢 Soft

Ashland

≈ 0–60 mg/L

🟢 Soft

Medford

≈ 60–120 mg/L

🟡 Moderately Hard

Central Point

≈ 0–60 mg/L

🟢 Soft

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 Klamath Falls's water safe to drink?

Yes. Klamath Falls'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 Klamath Falls?

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

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