Is tap water safe in Port St. Lucie?

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 Port St. Lucie, FL?

Nearby USGS observations produce an estimate of 341 ppm (19.9 grains per gallon), classified as very hard. This is not a tap measurement.

Do I need a water softener in ZIP code 34945?

At 341 ppm, a correctly sized whole-house softener can reduce scale buildup and hard-water spotting. Treatment for hardness does not remove all health-related contaminants.

City water profile

Port St. Lucie water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Port St. Lucie, Florida.

Median indexed hardness

302PPM

7 indexed ZIPs

Range 297–341 PPM

State comparison: 22 PPM above
State hardness rank: #103 of 290
Matched utilities: 1
Active health records: 0

City summary

What the indexed records say

Port St. Lucie has 7 published ZIP profiles across St. Lucie County. The indexed median is 302 PPM, compared with 280 PPM across Florida.

Among the 290 Floridacities with an indexed median, Port St. Lucie ranks #103from highest to lowest. Across all 603 state ZIP profiles, available estimates run from 20to 374.5 PPM.

The 297–341 PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs

Moderately hard0 ZIPs

Hard0 ZIPs

Very hard7 ZIPs

7 of 7 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 2.3 miles
Profiles with evidence: 7/7

Confidence labels

High: 0Moderate: 7Low: 0

St. Lucie West Services District

PWSID FL4565031

Groundwater

System population served: 21,400
Last reported: May 18, 2026

The system names this served city; Census place overlap links the city to this 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
Revised Total Coliform Rule	FL4565031	Dec 1, 2025	Archived
E. COLI	FL4565031	Dec 1, 2025	Archived
E. COLI	FL4565031	Sep 1, 2025	Archived
E. COLI	FL4565031	Jul 1, 2025	Resolved
Consumer Confidence Rule	FL4565031	Jul 1, 2025	Unaddressed
Revised Total Coliform Rule	FL4565031	Jul 1, 2025	Resolved
E. COLI	FL4565031	Apr 1, 2025	Resolved
E. COLI	FL4565031	Jan 1, 2025	Resolved
Revised Total Coliform Rule	FL4565031	Jan 1, 2025	Resolved
Revised Total Coliform Rule	FL4565031	Dec 1, 2024	Resolved

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 Florida communities

Fort Pierce

St. Lucie County

314 PPM median

Palm Coast

Flagler County

303 PPM median

Lake Butler

Union County

309 PPM median

Lehigh Acres

Hendry County

313 PPM median

Marco Island

Collier County

313 PPM median

Indiantown

Martin County

291 PPM median

Search all 291 Florida cities →

Questions people ask

About water in Port St. Lucie

Is the water hard?

The indexed city median is 302 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.