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Cass County, MO Water Quality

Water quality data for 18 public water systems serving Cass County, Missouri — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 18 water systems · 20 cities
✅
Excellent — All Systems Performing Well

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

A

Cass County Earns a A

Cass County: 20 communities across 18 water systems. 100.0% have no open violations.

  • Median lead where detected: 1.50 ppb
  • 11 communities with a lead detection, 9 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 7 with significant inspection deficiencies
  • 100.0% of communities have no open violations
1.5 ppb
Median Lead Level
County-wide, 90th percentile
18
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
  • Belton
    Not detected
    No federal limits exceeded on record
    A
  • Raymore
    Not detected
    No federal limits exceeded on record
    A
  • Pleasant Hill
    1.50 ppb
    No federal limits exceeded on record
    A
  • Peculiar
    Not detected
    No federal limits exceeded on record
    A
  • Lake Winnebago
    1.95 ppb
    No federal limits exceeded on record
    B
⚠ Needs Attention
  • Garden City
    Not detected
    1 significant inspection deficiency
    C
  • Archie
    Not detected
    1 significant inspection deficiency
    C
  • Cleveland
    1.78 ppb
    1 significant inspection deficiency
    C
  • East Lynne
    0.65 ppb
    1 significant inspection deficiency
    B
  • Harrisonville
    2.41 ppb
    1 significant inspection deficiency
    A
County Lead Level — Median 1.5 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 1.5 ppb — 10% of the federal action level
Systems by Lead Level
Under 5 ppb
11
No Data
9

All Cities in Cass County

Belton Not detected A
Raymore Not detected A
Harrisonville 2.41 ppb A
Pleasant Hill 1.50 ppb A
Peculiar Not detected A
Garden City Not detected C
Archie Not detected C
Lake Winnebago 1.95 ppb B
Drexel 1.23 ppb B
Loch Lloyd Not detected B
Cleveland 1.78 ppb C
Freeman Not detected B
Creighton 0.85 ppb B
East Lynne 0.65 ppb B
West Line 2.89 ppb B
Lake Annette 2.89 ppb B
Strasburg Not detected B
Gunn City 1.01 ppb A
Riverview Estates Not detected A
Baldwin Park 1.50 ppb A
Showing 20 cities
No active violations Active violations

About Cass County Drinking Water

Cass County is served by 18 water systems covering 20 communities. No community here has an open violation on record.

Of the communities reporting lead results, 11 recorded a detection, with a median of 1.50 ppb — 10% of the federal action level. 9 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 7 of them.

Frequently Asked Questions

Is Cass County tap water safe to drink?▼
No community in Cass County has an open violation on record. No community has PFAS above the federal limit on record.
What is the lead level in Cass County?▼
Among communities with a detection the median is 1.50 ppb, 10% of the 15 ppb action level. 9 reported none detected and 0 reported no result.
How many water systems serve Cass County?▼
18 community water systems serve 20 communities here.
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