Where does the water in 97037 come from?

Water for zip code 97037 in Maupin, Oregon is provided by 3 water systems. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 97037

Maupin, Oregon · Wasco County

84 PPM

4.9 GPG

Slightly Hard

0Soft60120180300+

High Confidence — USGS Monitoring

Dataset updated March 9, 2026Matched to 3 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 3 matched water systems. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.

Source basis

1 USGS-backed source

3 matched systems total for this ZIP; USGS monitoring is used where treated-water reports are unavailable.

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 Serving 97037

These are the systems matched to this ZIP code. The displayed ZIP value is weighted toward larger known service populations when population data is available.

3 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
The Dalles, City Of OR4100869	surface water	86 PPM Slightly Hard	13,010	High Confidence — USGS Monitoring
Maupin, City Of OR4100510	groundwater	52 PPM Soft	420	Estimated — Nearby Data
Pine Grove Water Dist (Wasco) OR4101122	groundwater	52 PPM Soft	140	Estimated — Nearby Data

The Dalles, City Of

OR4100869

Slightly Hard

86 PPMsurface water13,010 servedHigh Confidence — USGS Monitoring

Maupin, City Of

OR4100510

Soft

52 PPMgroundwater420 servedEstimated — Nearby Data

Pine Grove Water Dist (Wasco)

OR4101122

Soft

52 PPMgroundwater140 servedEstimated — Nearby Data

Nearby Zip Codes

9706385 9702998 9776152 9702186 9700185 9703320 9771152

What This Means For You

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

Slightly Hard Water

Your water is slightly hard. You may notice minor spotting on dishes or a slight film on faucets. A water softener is optional but can improve water quality.

Recommended Products

Water Hardness Test Kit

Our PickVarify (150 Strips)Also GreatJNW Direct (150 Strips)

Salt-Free Water Conditioner

Our PickSpringWell Salt-Free Cartridge

Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | How to Test Your 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 Maupin, OR (97037).

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Frequently Asked Questions

Is the water hard in Maupin, OR (97037)?

The average water hardness in 97037 is 84 PPM (4.9 GPG), which is classified as slightly hard.

Do I need a water softener in 97037?

At 84 PPM, your water is relatively soft. A water softener is generally not necessary.

Is hard water in 97037 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 97037?

Zip code 97037 in Maupin, Oregon is served by 3 water systems.