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

The USA national average is 151 mg/L. Poulsbo (80 mg/L) is 71 mg/L softer than average.

Poulsbo Water Hardness & Quality Report (2026)

Water Hardness

80mg/L

Moderately Hard

4.7 grains per gallon

Source

groundwater

pH Level

7.2

neutral = 7.0

Lead

0.008 mg/L

✓ Below action level

TDS

188.3 mg/L

Est. Daily Cost

$0.21

energy & soap waste

Source: See methodology section below · Updated 2026

80mg/L as CaCO₃Moderately Hard

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 Poulsbo, your appliances are currently losing 11% efficiency due to mineral buildup.

Appliance	In Poulsbo	Soft Water City	Efficiency Loss
Kettle	7 yrs	8.5 yrs	-18%
Washing Machine	10.6 yrs	12 yrs	-12%
Water Heater	12.4 yrs	15 yrs	-17%

Regional Water Comparison

How Poulsbo compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Poulsbo, Washington	80 mg/L	0 ppt	🟡 Moderately Hard	groundwater
Silverdale, Washington	≈ 120–179 mg/L	0 ppt	🟠 Hard	groundwater
Bainbridge Island, Washington	≈ 120–179 mg/L	0 ppt	🟠 Hard	groundwater
Bremerton, Washington	≈ 0–60 mg/L	4.9 ppt	🟢 Soft	reservoir
Port Orchard, Washington	≈ 60–120 mg/L	23.9 ppt	🟡 Moderately Hard	groundwater

National Benchmark

How Poulsbo compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Poulsbo	80 mg/L	🟡 Low
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

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What Makes Poulsbo's Water Unique?

Local geology and source profile

Source: GroundwaterTDS: 188.3 mg/LpH: 7.2

The City of Poulsbo Water Utility supplies water to about 17,180 residents in Poulsbo, Washington, drawing from five groundwater sources. Water undergoes disinfection, filtration, and pre-oxidation at the treatment facilities, with sodium hypochlorite used as the main disinfectant. The utility's operations are managed from its office at 200 NE Moe Street, Poulsbo, WA 98370. This water originates from the Puget Sound lowland aquifer system, a complex geological setting shaped by Quaternary glaciation. The aquifer consists of glacial till, outwash deposits, and underlying Tertiary sedimentary formations. The area's geology, influenced by the nearby Cascade Range and Olympic Mountains, results in moderate mineral content. Glacial meltwater and snowmelt runoff from these mountain ranges contribute to the relatively moderate hardness.

At moderately hard levels, Poulsbo's water will cause gradual scale buildup in water heaters, dishwashers, and plumbing fixtures over time. Homeowners might notice spotting on dishes, reduced soap lather, and potential dry skin effects. Water heaters and hot-water appliances are particularly vulnerable to mineral accumulation. While not strictly necessary, a water softener is recommended for households with sensitive skin, those running high-temperature appliances frequently, or residents concerned about scale maintenance. Regular descaling of fixtures and flushing of the water heater can help extend appliance life.

The Poulsbo 2024 Consumer Confidence Report confirms the utility meets all federal and state drinking water standards. The system has detected two contaminants above EPA health-based guidelines in at least one city served. Sodium content measures 5.3 parts per million, which is suitable for salt-restricted diets. The utility rigorously tests over 181 contaminants and employs multi-stage treatment, including chlorine pre-oxidation, filtration, and final disinfection, to ensure microbiological safety and compliance with Safe Drinking Water Act requirements.

Geology & Source: Quaternary glacial deposits and Tertiary sedimentary formations; glacial till and sediments yield moderate hardness

Other Washington Water Reports

Silverdale

≈ 120–179 mg/L

🟠 Hard

Bainbridge Island

≈ 120–179 mg/L

🟠 Hard

Bremerton

≈ 0–60 mg/L

🟢 Soft

Port Orchard

≈ 60–120 mg/L

🟡 Moderately Hard

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Frequently Asked Questions

Is Poulsbo's water safe to drink?

Yes. Poulsbo's water meets all federal safety standards. The hardness is 80 mg/L (Moderately Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Poulsbo?

Poulsbo's water is moderately hard at 80 mg/L. A water softener is generally not necessary, though a carbon filter can improve taste and remove any remaining chlorine.

How does Poulsbo compare to the USA average?

The USA national average is 151 mg/L. Poulsbo (80 mg/L) is 71 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 Poulsbo 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.