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Martin County, FL Water Quality

Water quality data for 4 public water systems serving Martin County, Florida — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 4 water systems · 11 cities
✅
Excellent — All Systems Performing Well

Water quality across the county is outstanding with minimal violations and very low lead levels.

A

Martin County Earns a A

Martin County: 11 communities across 4 water systems. 100.0% have no open violations.

  • Median lead where detected: 4.00 ppb
  • 11 communities with a lead detection, 0 reporting none detected
  • 2 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 100.0% of communities have no open violations
4 ppb
Median Lead Level
County-wide, 90th percentile
4
Water Systems
Active CWS & NTNCWS
100%
Violation-Free
No active violations on record
How we grade counties: MyWaterIQ uses EPA SDWIS enforcement data — actual MCL violations and lead test results — not the aspirational MCLG targets used by some sites. A grade reflects real compliance history, not theoretical risk. Learn more →

Cities by Water Quality

⭐ Best Performing
  • Palm City
    4.00 ppb
    No federal limits exceeded on record
    A
  • Stuart
    1.20 ppb
    No federal limits exceeded on record
    A
  • Jensen Beach
    4.00 ppb
    No federal limits exceeded on record
    A
  • Port Salerno
    4.00 ppb
    No federal limits exceeded on record
    A
  • North River Shores
    4.00 ppb
    No federal limits exceeded on record
    A
⚠ Needs Attention
  • Hobe Sound
    1.10 ppb
    PFAS above the limit at 1 of 1 sampling points
    C
  • Jupiter Island
    1.10 ppb
    PFAS above the limit at 1 of 1 sampling points
    C
  • Indiantown
    0.50 ppb
    1 health-based violation since 2015
    B
  • Palm City
    4.00 ppb
    No federal limits exceeded on record
    A
  • Stuart
    1.20 ppb
    No federal limits exceeded on record
    A
County Lead Level — Median 4 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 4 ppb — 26.7% of the federal action level
Systems by Lead Level
Under 5 ppb
11

All Cities in Martin County

Palm City 4.00 ppb A
Stuart 1.20 ppb A
Hobe Sound 1.10 ppb C
Jensen Beach 4.00 ppb A
Port Salerno 4.00 ppb A
Indiantown 0.50 ppb B
North River Shores 4.00 ppb A
Sewall's Point 4.00 ppb A
Rio 4.00 ppb A
Jupiter Island 1.10 ppb C
Ocean Breeze 4.00 ppb A
Showing 11 cities
No active violations Active violations

About Martin County Drinking Water

Martin County is served by 4 water systems covering 11 communities. No community here has an open violation on record.

Of the communities reporting lead results, 11 recorded a detection, with a median of 4.00 ppb — 27% of the federal action level. 0 reported none detected, which means below the laboratory limit rather than an absence of lead.

2 of 11 communities have PFAS above the limits EPA set in 2024, measured as a running annual average at each sampling point. State inspectors recorded no significant deficiencies.

Frequently Asked Questions

Is Martin County tap water safe to drink?▼
No community in Martin County has an open violation on record. 2 of 11 have PFAS above the federal limit, which is the main open concern.
What is the lead level in Martin County?▼
Among communities with a detection the median is 4.00 ppb, 27% of the 15 ppb action level. 0 reported none detected and 0 reported no result.
How many water systems serve Martin County?▼
4 community water systems serve 11 communities here.
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