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Water Hardness in 70454

Ponchatoula, Louisiana · Tangipahoa Parish County

49 PPM
2.9 GPG
Soft
0Soft60120180300+
High Confidence — USGS Monitoring

Dataset updated March 9, 2026Matched to 5 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 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.

Source basis
5 USGS-backed sources
5 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 70454

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.

5 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.
Tangipahoa Parish Water District
LA1105008
Soft
19 PPMgroundwater72,504 servedHigh Confidence — USGS Monitoring
City Of Hammond Water System
LA1105009
Soft
19 PPMgroundwater21,135 servedHigh Confidence — USGS Monitoring
Pontchatoula Water System
LA1105019
Very Hard
430 PPMgroundwater6,657 servedHigh Confidence — USGS Monitoring
La Casa Llc
LA1105042
Very Hard
430 PPMgroundwater540 servedHigh Confidence — USGS Monitoring
West Yellow Water Mh Park
LA1105102
Very Hard
430 PPMgroundwater174 servedHigh Confidence — USGS Monitoring

Nearby Zip Codes

70447770403197045519704622370401197043377045119700685070471770466197071122704487

What This Means For You

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

Your Water Is Soft

Your water hardness is in the soft range. You likely don't need a water softener. Enjoy your naturally soft 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 Ponchatoula, LA (70454).

Submit Your Data

Frequently Asked Questions

Is the water hard in Ponchatoula, LA (70454)?

The average water hardness in 70454 is 49 PPM (2.9 GPG), which is classified as soft.

Do I need a water softener in 70454?

At 49 PPM, your water is relatively soft. A water softener is generally not necessary.

Is hard water in 70454 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 70454?

Zip code 70454 in Ponchatoula, Louisiana is served by 5 water systems.

Learn More About Your Water

Water Hardness Scale: PPM and GPG Chart

Use the USGS water hardness scale to compare PPM, GPG, and mg/L levels from soft to very hard water.

10 min read

How to Test Water Hardness at Home

Compare free lookups, soap tests, test strips, liquid drop kits, and lab tests for measuring water hardness.

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