Where does the water in 53583 come from?

Water for zip code 53583 in Sauk City, Wisconsin 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 53583

Sauk City, Wisconsin · Sauk County

191 PPM

11.2 GPG

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

3 USGS-backed sources

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

Water source profile

Primarily groundwater

Groundwater commonly picks up calcium and magnesium after contact with rock and soil. 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 53583

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
Baraboo Waterworks WI1570085	groundwater	149 PPM Moderately Hard	12,703	High Confidence — USGS Monitoring
Sauk City Waterworks WI1570105	groundwater	338 PPM Very Hard	3,518	High Confidence — USGS Monitoring
Cortland Acres WI6420299	groundwater	338 PPM Very Hard	145	High Confidence — USGS Monitoring

Baraboo Waterworks

WI1570085

Moderately Hard

149 PPMgroundwater12,703 servedHigh Confidence — USGS Monitoring

Sauk City Waterworks

WI1570105

Very Hard

338 PPMgroundwater3,518 servedHigh Confidence — USGS Monitoring

Cortland Acres

WI6420299

Very Hard

338 PPMgroundwater145 servedHigh Confidence — USGS Monitoring

Nearby Zip Codes

53578199 53560300 53951155 53515300 53503288 53528301 53561149 53517300 53577157 53555329 53588169 53943148

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 48K Also GreatWhirlpool WHES40E 40K Also GreatAFWFilters 64K Grain Also GreatAFWFilters Iron Pro 2 64K Also 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 Duo Also GreatAquaBliss SF100 Also GreatSprite Pure 7-Setting Also GreatAqua Earth 20-Stage

Water Softener Salt

Our PickMorton Clean & Protect Also 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 Sauk City, WI (53583).

Submit Your Data

Frequently Asked Questions

Is the water hard in Sauk City, WI (53583)?

The average water hardness in 53583 is 191 PPM (11.2 GPG), which is classified as hard.

Do I need a water softener in 53583?

With hardness of 191 PPM, a water softener is recommended for homes in 53583.

Is hard water in 53583 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 53583?

Zip code 53583 in Sauk City, Wisconsin is served by 3 water systems.