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San Patricio County, TX Water Quality

Water quality data for 12 public water systems serving San Patricio County, Texas — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 12 water systems · 19 cities
✅
Excellent — All Systems Performing Well

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

A

San Patricio County Earns a A

San Patricio County: 19 communities across 12 water systems. 100.0% have no open violations.

  • Median lead where detected: 1.51 ppb
  • 18 communities with a lead detection, 1 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 100.0% of communities have no open violations
1.51 ppb
Median Lead Level
County-wide, 90th percentile
12
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
  • Sinton
    3.70 ppb
    No federal limits exceeded on record
    B
  • Ingleside on the Bay
    4.80 ppb
    No federal limits exceeded on record
    B
  • Edroy
    1.70 ppb
    No federal limits exceeded on record
    B
  • Portland
    1.48 ppb
    2 health-based violations since 2015
    A
  • Aransas Pass
    2.80 ppb
    1 health-based violation since 2015
    B
⚠ Needs Attention
  • Taft Southwest
    2.95 ppb
    3 health-based violations since 2015
    B
  • Ingleside
    12.30 ppb
    1 health-based violation since 2015
    B
  • Mathis
    1.14 ppb
    23 health-based violations since 2015
    B
  • Taft
    2.95 ppb
    3 health-based violations since 2015
    B
  • Morgan Farm
    1.51 ppb
    3 health-based violations since 2015
    B
County Lead Level — Median 1.51 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 1.51 ppb — 10.1% of the federal action level
Systems by Lead Level
Under 5 ppb
17
10 – 15 ppb
1
No Data
1

All Cities in San Patricio County

Portland 1.48 ppb A
Ingleside 12.30 ppb B
Aransas Pass 2.80 ppb B
Sinton 3.70 ppb B
Mathis 1.14 ppb B
Taft 2.95 ppb B
Odem 1.50 ppb B
Gregory Not detected B
Ingleside on the Bay 4.80 ppb B
St. Paul 1.10 ppb B
Morgan Farm 1.51 ppb B
Edroy 1.70 ppb B
Del Sol 1.51 ppb B
La Paloma Addition 1.51 ppb B
Tradewinds 1.51 ppb B
Loma Linda 1.51 ppb B
Falman 2.80 ppb B
Rancho Chico 1.51 ppb B
Taft Southwest 2.95 ppb B
Showing 19 cities
No active violations Active violations

About San Patricio County Drinking Water

San Patricio County is served by 12 water systems covering 19 communities. No community here has an open violation on record.

Of the communities reporting lead results, 18 recorded a detection, with a median of 1.51 ppb — 10% of the federal action level. 1 reported none detected, which means below the laboratory limit rather than an absence of lead.

No community here has PFAS above the federal limit on record. State inspectors recorded no significant deficiencies.

Frequently Asked Questions

Is San Patricio County tap water safe to drink?▼
No community in San Patricio County has an open violation on record. No community has PFAS above the federal limit on record.
What is the lead level in San Patricio County?▼
Among communities with a detection the median is 1.51 ppb, 10% of the 15 ppb action level. 1 reported none detected and 0 reported no result.
How many water systems serve San Patricio County?▼
12 community water systems serve 19 communities here.
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