Is tap water safe in Folsom?

EPA SDWIS shows no active health-based violation in this profile's reporting window. That is not the same as proving every contaminant is absent, and federal data can lag state and utility records.

How hard is the water in Folsom, LA?

Nearby USGS observations produce an estimate of 31.7 ppm (1.9 grains per gallon), classified as soft. This is not a tap measurement.

Do I need a water softener in ZIP code 70437?

There is no high-hardness trigger in this profile. Confirm conditions with an at-home hardness test before purchasing equipment.

City water profile

Folsom water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Folsom, Louisiana.

Median indexed hardness

32PPM

One indexed ZIP

Range 31.7–31.7 PPM

State comparison: 58 PPM below
State hardness rank: #43 of 52
Matched utilities: 1
Active health records: 0

City summary

What the indexed records say

Folsom has 1 published ZIP profile across St. Tammany Parish. The indexed median is 32 PPM, compared with 90 PPM across Louisiana.

Among the 52 Louisianacities with an indexed median, Folsom ranks #43from highest to lowest. Across all 102 state ZIP profiles, available estimates run from 4.8to 314 PPM.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

Hardness distribution

How local ZIP estimates compare

Soft1 ZIP

Moderately hard0 ZIPs

Hard0 ZIPs

Very hard0 ZIPs

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 43.5 miles
Profiles with evidence: 1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: May 18, 2016 to May 18, 2016.

ZIP directory

Water reports in Folsom

Open a ZIP for site-level provenance and measurements.

ZIP code

70437

Soft

31.7 PPM

Nearest site: 43.5 mi
Confidence: Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

Folsom Water Supply

PWSID LA1103014

Groundwater

System population served: 1,992
Last reported: Jun 23, 2026

A municipal system, in-state city, and served county all agree with this Census ZCTA.

Compliance history

What EPA records show

No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.

Record	System	Period	Status
Groundwater Rule	LA1103014	Oct 13, 2022	Resolved · health-based

Practical next steps

Move from index to evidence

1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Continue comparing

Other Louisiana communities

Covington

St. Tammany Parish

32 PPM median

Mandeville

St. Tammany Parish

32 PPM median

Slidell

St. Tammany Parish

32 PPM median

Hammond

Tangipahoa Parish

32 PPM median

Bogalusa

Washington Parish

32 PPM median

Mansfield

De Soto Parish

31 PPM median

Search all 52 Louisiana cities →

Questions people ask

About water in Folsom

Is the water hard?

The indexed city median is 32 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.