WH

Water Hardness in Grants Pass, OR

Oregon · 2 zip codes · 28 matched water systems

27 PPM
1.6 GPG
Soft
0Soft60120180300+
Estimated — Nearby Data

Dataset updated March 9, 202628 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 28 matched water systems and 2 ZIP codes. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
28 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 Grants Pass

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

28 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.
Grants Pass, City Of
OR4100342
Soft
18 PPMsurface water37,138 servedEstimated — Nearby Data
Rogue Lea Estates-North/South
OR4101405
Very Hard
311 PPMgroundwater350 servedEstimated — Nearby Data
Willow Estates Mobile Home Pk
OR4101354
Very Hard
311 PPMgroundwater250 servedEstimated — Nearby Data
Country Estates Mobile Park
OR4100340
Very Hard
311 PPMgroundwater175 servedEstimated — Nearby Data
Norwood Pud
OR4101471
Very Hard
311 PPMgroundwater150 servedEstimated — Nearby Data
Showing the first 5 systems. Expand to review all matched systems.

Zip Codes in Grants Pass, OR

97526299752726

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 Grants Pass, OR.

Submit Your Data

Frequently Asked Questions

How hard is the water in Grants Pass, OR?

The citywide weighted average water hardness in Grants Pass, OR is 27 PPM (1.6 GPG), classified as soft. This is based on 28 matched water systems.

Do I need a water softener in Grants Pass, OR?

At 27 PPM, the citywide average is relatively soft. A water softener is generally not necessary.

Is hard water in Grants Pass, 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 Grants Pass, OR?

Grants Pass, Oregon is served by 28 matched water systems across 2 zip codes.

Learn More About Your Water

Water Hardness Scale: PPM and GPG Chart

Use the USGS water hardness scale to compare PPM, GPG, and mg/L levels from soft to very hard water.

10 min read

How to Test Water Hardness at Home

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

8 min read