States › Missouri › Franklin County

Franklin County, MO Water Quality

Water quality data for 13 public water systems serving Franklin County, Missouri — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 13 water systems · 16 cities
✅
Generally Safe — Most Systems Performing Well

The majority of water systems have no active violations and lead levels well below the federal action level.

B

Franklin County Earns a B

Franklin County: 16 communities across 13 water systems. 100.0% have no open violations.

  • Median lead where detected: 2.38 ppb
  • 14 communities with a lead detection, 2 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 13 with significant inspection deficiencies
  • 100.0% of communities have no open violations
2.38 ppb
Median Lead Level
County-wide, 90th percentile
13
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
  • Gerald
    2.90 ppb
    No federal limits exceeded on record
    B
  • Stanton
    1.16 ppb
    No federal limits exceeded on record
    B
  • Pacific
    10.00 ppb
    Lead at 10.00 ppb, above a third of the action level
    A
  • Sullivan
    1.68 ppb
    2 significant inspection deficiencies
    A
  • Villa Ridge
    1.90 ppb
    2 significant inspection deficiencies
    A
⚠ Needs Attention
  • Washington
    2.62 ppb
    2 significant inspection deficiencies
    C
  • St. Clair
    2.38 ppb
    1 significant inspection deficiency
    C
  • Lake St. Clair
    2.38 ppb
    1 significant inspection deficiency
    C
  • Parkway
    2.38 ppb
    1 significant inspection deficiency
    C
  • Oak Grove Village
    1.90 ppb
    3 significant inspection deficiencies
    B
County Lead Level — Median 2.38 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 2.38 ppb — 15.9% of the federal action level
Systems by Lead Level
Under 5 ppb
12
10 – 15 ppb
2
No Data
2

All Cities in Franklin County

Washington 2.62 ppb C
Union 2.48 ppb B
Sullivan 1.68 ppb A
St. Clair 2.38 ppb C
Pacific 10.00 ppb A
Villa Ridge 1.90 ppb A
Gray Summit 1.90 ppb A
New Haven Not detected B
Gerald 2.90 ppb B
Lake St. Clair 2.38 ppb C
Oak Grove Village 1.90 ppb B
Parkway 2.38 ppb C
Berger Not detected B
Leslie 2.89 ppb B
Miramiguoa Park 10.70 ppb B
Stanton 1.16 ppb B
Showing 16 cities
No active violations Active violations

About Franklin County Drinking Water

Franklin County is served by 13 water systems covering 16 communities. No community here has an open violation on record.

Of the communities reporting lead results, 14 recorded a detection, with a median of 2.38 ppb — 16% of the federal action level. 2 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 significant deficiencies at 13 of them.

Frequently Asked Questions

Is Franklin County tap water safe to drink?▼
No community in Franklin County has an open violation on record. No community has PFAS above the federal limit on record.
What is the lead level in Franklin County?▼
Among communities with a detection the median is 2.38 ppb, 16% of the 15 ppb action level. 2 reported none detected and 0 reported no result.
How many water systems serve Franklin County?▼
13 community water systems serve 16 communities here.
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