Water Hardness in Saint Helens, OR

Q: Do I need a water softener in Saint Helens, OR?

At a citywide weighted average of 37 PPM, Saint Helens has relatively soft water. A water softener is generally not necessary.

Q: How many water systems serve Saint Helens, OR?

Saint Helens, Oregon has 6 matched water systems across 1 zip code.

Oregon · 1 zip codes · 6 matched water systems

37 PPM

2.2 GPG

Soft

0Soft60120180300+

Estimated — Nearby Data

Dataset updated March 9, 20266 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

Source context

How this city reading is built

This city reading is a weighted rollup across 6 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis

6 estimated sources

This city reading needs local confirmation before equipment sizing or purchase decisions.

Water source profile

Primarily surface water

Surface-water hardness can shift with reservoirs, runoff, season, and treatment. This profile is weighted by known population served across matched systems.

Data recency

March 9, 2026

Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.

Water Systems in Saint Helens

These systems are matched to Saint Helens, OR. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.

6 water systems

PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.

Water System	Source	Hardness	Pop. Served	Data Source
St Helens, City Of OR4100724	surface water	19 PPM Soft	13,410	Estimated — Nearby Data
Mcnulty Water Pud OR4100725	groundwater	87 PPM Slightly Hard	2,500	Estimated — Nearby Data
Warren Water Association OR4100726	groundwater	87 PPM Slightly Hard	2,050	Estimated — Nearby Data
Deer Island Waterworks OR4101233	groundwater	87 PPM Slightly Hard	90	Estimated — Nearby Data
Deer Island Heights Ws OR4105114	groundwater	87 PPM Slightly Hard	60	Estimated — Nearby Data

St Helens, City Of

OR4100724

Soft

19 PPMsurface water13,410 servedEstimated — Nearby Data

Mcnulty Water Pud

OR4100725

Slightly Hard

87 PPMgroundwater2,500 servedEstimated — Nearby Data

Warren Water Association

OR4100726

Slightly Hard

87 PPMgroundwater2,050 servedEstimated — Nearby Data

Deer Island Waterworks

OR4101233

Slightly Hard

87 PPMgroundwater90 servedEstimated — Nearby Data

Deer Island Heights Ws

OR4105114

Slightly Hard

87 PPMgroundwater60 servedEstimated — Nearby Data

Showing the first 5 systems. Expand to review all matched systems.

Zip Codes in Saint Helens, OR

9705137

What This Means For You

Recommendations are based on the displayed hardness reading. Confirm your tap reading before sizing or buying treatment equipment.

Your Water Is Soft

Your water hardness is in the soft range. You likely don't need a water softener. Enjoy your naturally soft water!

Know your water hardness?

If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Saint Helens, OR.

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Frequently Asked Questions

How hard is the water in Saint Helens, OR?

The citywide weighted average water hardness in Saint Helens, OR is 37 PPM (2.2 GPG), classified as soft. This is based on 6 matched water systems.

Do I need a water softener in Saint Helens, OR?

At 37 PPM, the citywide average is relatively soft. A water softener is generally not necessary.

Is hard water in Saint Helens, OR safe to drink?

Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.

How many water systems serve Saint Helens, OR?

Saint Helens, Oregon is served by 6 matched water systems across 1 zip code.

Learn More About Your Water

Water Hardness Scale: PPM and GPG Chart

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Compare free lookups, soap tests, test strips, liquid drop kits, and lab tests for measuring water hardness.

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