Where does the water in 46368 come from?

Water for zip code 46368 in Portage, Indiana is provided by 2 water systems. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 46368

Portage, Indiana · Porter County

435 PPM

25.5 GPG

Very Hard

0Soft60120180300+

High Confidence — USGS Monitoring

Dataset updated March 9, 2026Matched to 2 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 2 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

2 USGS-backed sources

2 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 46368

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.

2 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
Valparaiso Department Of Water Works IN5264029	groundwater	442 PPM Very Hard	36,000	High Confidence — USGS Monitoring
Ogden Dunes Water IN5264040	surface water	212 PPM Hard	1,110	High Confidence — USGS Monitoring

Valparaiso Department Of Water Works

IN5264029

Very Hard

442 PPMgroundwater36,000 servedHigh Confidence — USGS Monitoring

Ogden Dunes Water

IN5264040

Hard

212 PPMsurface water1,110 servedHigh Confidence — USGS Monitoring

Nearby Zip Codes

46403144 46405144 46393442 46342145 46304442 46407144 46409144 46402144 46385442 46404144 46408144 46410145

What This Means For You

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

Very Hard Water - Treatment Strongly Recommended

Your water is very hard. Without treatment, you can expect significant scale buildup in pipes and appliances, higher energy bills from reduced water heater efficiency, and persistent issues with skin and hair dryness.

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

Water Hardness Test Kit

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

Whole-House Water Filter

Our PickiSpring WGB32B 3-Stage

Water Softener Salt

Our PickMorton Clean & Protect Also GreatDiamond Crystal Bright & Soft

Shower Head Filter

Our PickWeddell Duo Also GreatAquaBliss SF100 Also GreatSprite Pure 7-Setting Also GreatAqua Earth 20-Stage

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 Portage, IN (46368).

Submit Your Data

Frequently Asked Questions

Is the water hard in Portage, IN (46368)?

The average water hardness in 46368 is 435 PPM (25.5 GPG), which is classified as very hard.

Do I need a water softener in 46368?

With hardness of 435 PPM, a water softener is recommended for homes in 46368.

Is hard water in 46368 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 46368?

Zip code 46368 in Portage, Indiana is served by 2 water systems.