Water Hardness in 46319
Griffith, Indiana · Lake County
Dataset updated March 9, 2026Matched to 11 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 11 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.
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 46319
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.
| Water System | Source | Hardness | Pop. Served |
|---|---|---|---|
| Indiana American Water - Northwest IN5245015 | surface water | 144 PPM Moderately HardUSGS estimate: 384 PPM | |
| Hammond Water Works Department IN5245020 | surface water | 144 PPM Moderately HardUSGS estimate: 206 PPM | |
| Crown Point Water Works IN5245008 | surface water | 144 PPM Moderately HardUSGS estimate: 212 PPM | |
| Schererville Water Department IN5245041 | surface water | 144 PPM Moderately HardUSGS estimate: 206 PPM | |
| East Chicago Water Works IN5245012 | surface water | 144 PPM Moderately HardUSGS estimate: 185 PPM |
Nearby Zip Codes
What This Means For You
Use this ZIP reading as a local planning estimate, not a final treatment specification. Hardness can vary by utility zone, seasonal blend, private well, and building plumbing. Confirm your tap reading with a utility report or home hardness test before sizing equipment.
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 Griffith, IN (46319).
Frequently Asked Questions
Is the water hard in Griffith, IN (46319)?
The average water hardness in 46319 is 144 PPM (8.4 GPG), which is classified as moderately hard.
Do I need a water softener in 46319?
With hardness of 144 PPM, a water softener is worth considering for homes in 46319.
Is hard water in 46319 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 46319?
Zip code 46319 in Griffith, Indiana is served by 11 water systems.
Learn More About Your Water
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 readHard Water vs Soft Water: Key Differences
Compare hard water and soft water by minerals, taste, soap lather, skin, hair, plumbing, and treatment needs.
10 min readPPM to GPG Converter + Water Hardness Scale Explained
Convert between PPM and GPG instantly. Understand the USGS water hardness scale and what your numbers mean for your home.
5 min read