Water Hardness in 70538
Franklin, Louisiana · St. Mary Parish County
Dataset updated March 9, 2026Matched to 5 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 5 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 70538
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 |
|---|---|---|---|
| Morgan City Water System LA1101005 | surface water | 123 PPM Moderately Hard | |
| Franklin Water Supply LA1101003 | surface water | 193 PPM Hard | |
| St Mary Water & Sewer Comm #3 LA1101010 | surface water | 123 PPM Moderately Hard | |
| St Mary Parish Water Sewerage Comm 1 LA1101009 | surface water | 123 PPM Moderately Hard | |
| Port Of West St Mary LA1101013 | groundwater | 259 PPM Very Hard |
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 Franklin, LA (70538).
Frequently Asked Questions
Is the water hard in Franklin, LA (70538)?
Our estimate for 70538 is 143 PPM (8.4 GPG), but it is based on nearby, county, or state-level data rather than a direct treated tap-water report for this exact location. Confirm with your utility or a home test.
Do I need a water softener in 70538?
Do not size a softener from this estimate alone. Confirm the actual tap-water hardness before choosing treatment equipment.
Is hard water in 70538 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 70538?
Zip code 70538 in Franklin, Louisiana is served by 5 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