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Water Hardness in 58505

Bismarck, North Dakota · Burleigh County

200 PPM
11.7 GPG
Hard
0Soft60120180300+
Verified — Annual Water Quality Report

Dataset updated March 9, 2026Matched to 4 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 4 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
4 verified treated-water sources
4 matched systems total for this ZIP; treated-water reports are prioritized when available.
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 58505

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.

4 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.
Bismarck City Of
ND0800080
Hard
200 PPMsurface water72,417 servedVerified — Annual Water Quality Report
Source water: 409 PPM
South Central Rwd North Burleigh
ND0801502
Hard
200 PPMsurface water10,400 servedVerified — Annual Water Quality Report
Source water: 409 PPM
South Central Regional Water District
ND0801154
Hard
200 PPMsurface water3,700 servedVerified — Annual Water Quality Report
Source water: 409 PPM
Northwestern Area Water Supply
ND5101687
Hard
200 PPMgroundwater0 servedVerified — Annual Water Quality Report
Source water: 404 PPM

Nearby Zip Codes

585012005850421058554297585582015852120058566297585722005857960358560200585304595854439958535297

What This Means For You

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

Hard Water - Treatment Recommended

Your water is hard. Scale buildup is likely affecting your plumbing and appliances, reducing their lifespan and efficiency. A water softener is recommended to protect your home.

Recommended Products

Salt-Based Water Softener
Our PickAFWFilters Fleck 5600SXT 48KAlso GreatWhirlpool WHES40E 40KAlso GreatAFWFilters 64K GrainAlso GreatAFWFilters Iron Pro 2 64KAlso GreatSpringWell Filter + Softener Combo
Salt-Free Water Conditioner
Our PickSpringWell Salt-Free Cartridge
Water Hardness Test Kit
Our PickVarify (150 Strips)Also GreatJNW Direct (150 Strips)
Shower Head Filter
Our PickWeddell DuoAlso GreatAquaBliss SF100Also GreatSprite Pure 7-SettingAlso GreatAqua Earth 20-Stage
Water Softener Salt
Our PickMorton Clean & ProtectAlso GreatDiamond Crystal Bright & Soft

Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | Size Calculator | 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 Bismarck, ND (58505).

Submit Your Data

Frequently Asked Questions

Is the water hard in Bismarck, ND (58505)?

The average water hardness in 58505 is 200 PPM (11.7 GPG), which is classified as hard.

Do I need a water softener in 58505?

With hardness of 200 PPM, a water softener is recommended for homes in 58505.

Is hard water in 58505 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 58505?

Zip code 58505 in Bismarck, North Dakota is served by 4 water systems.

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