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City water profile

Marco Island water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Marco Island, Florida.

Median indexed hardness

313PPM

2 indexed ZIPs

Range 313–313 PPM

State comparison
33 PPM above
State hardness rank
#100 of 290
Matched utilities
2
Active health records
0

City summary

What the indexed records say

Marco Island has 2 published ZIP profiles across Collier County. The indexed median is 313 PPM, compared with 280 PPM across Florida.

Among the 290 Floridacities with an indexed median, Marco Island ranks #100from highest to lowest. Across all 603 state ZIP profiles, available estimates run from 20to 374.5 PPM.

The 313–313 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 hard2 ZIPs

2 of 2 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
13.7 miles
Profiles with evidence
2/2

Confidence labels

High: 0Moderate: 2Low: 0

Observation window: Apr 1, 2019 to Jan 28, 2026.

ZIP directory

Water reports in Marco Island

Open a ZIP for site-level provenance and measurements.

ZIP code

34140

Very Hard

313 PPM

Nearest site
11.4 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

34145

Very Hard

313 PPM

Nearest site
13.7 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Marco Island Utilities (city Of)

PWSID FL5110183

Surface water
System population served
31,830
Last reported
May 18, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Goodland Water Company

PWSID FL5110118

Surface water
System population served
853
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.

RecordSystemPeriodStatus
Consumer Confidence RuleFL5110118Jul 1, 2025Unaddressed
Revised Total Coliform RuleFL5110118Dec 1, 2024Resolved
Revised Total Coliform RuleFL5110118Oct 1, 2024Resolved
Revised Total Coliform RuleFL5110118Sep 1, 2024Resolved
Consumer Confidence RuleFL5110183Jul 1, 2024Resolved
Revised Total Coliform RuleFL5110183Jun 1, 2024Resolved
Revised Total Coliform RuleFL5110118Jun 1, 2024Resolved
TTHMFL5110183Apr 1, 2024Resolved
Total Haloacetic Acids (HAA5)FL5110183Apr 1, 2024Resolved
Total Haloacetic Acids (HAA5)FL5110183Oct 1, 2023Resolved

Practical next steps

Move from index to evidence

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

Questions people ask

About water in Marco Island

Is the water hard?

The indexed city median is 313 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.