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Riley County, KS Water Quality

Water quality data for 8 public water systems serving Riley County, Kansas — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 8 water systems · 8 cities
✅
Excellent — All Systems Performing Well

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

A

Riley County Earns a A

Riley County: 8 communities across 8 water systems. 100.0% have no open violations.

  • Median lead where detected: 1.90 ppb
  • 5 communities with a lead detection, 3 reporting none detected
  • 1 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 100.0% of communities have no open violations
1.9 ppb
Median Lead Level
County-wide, 90th percentile
8
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
  • Manhattan
    1.90 ppb
    No federal limits exceeded on record
    A
  • Ogden
    Not detected
    No federal limits exceeded on record
    B
  • Riley
    2.80 ppb
    No federal limits exceeded on record
    B
  • Leonardville
    2.90 ppb
    No federal limits exceeded on record
    B
  • Randolph
    Not detected
    No federal limits exceeded on record
    B
⚠ Needs Attention
  • Fort Riley
    1.20 ppb
    PFAS above the limit at 1 of 1 sampling points
    D
  • Zeandale
    1.80 ppb
    Copper above the 1,300 ppb action level
    B
  • Manhattan
    1.90 ppb
    No federal limits exceeded on record
    A
  • Ogden
    Not detected
    No federal limits exceeded on record
    B
  • Riley
    2.80 ppb
    No federal limits exceeded on record
    B
County Lead Level — Median 1.9 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 1.9 ppb — 12.7% of the federal action level
Systems by Lead Level
Under 5 ppb
5
No Data
3

All Cities in Riley County

Manhattan 1.90 ppb A
Fort Riley 1.20 ppb D
Ogden Not detected B
Riley 2.80 ppb B
Leonardville 2.90 ppb B
Randolph Not detected B
Zeandale 1.80 ppb B
Keats Not detected B
Showing 8 cities
No active violations Active violations

About Riley County Drinking Water

Riley County is served by 8 water systems covering 8 communities. No community here has an open violation on record.

Of the communities reporting lead results, 5 recorded a detection, with a median of 1.90 ppb — 13% of the federal action level. 3 reported none detected, which means below the laboratory limit rather than an absence of lead.

1 of 8 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 Riley County tap water safe to drink?▼
No community in Riley County has an open violation on record. 1 of 8 have PFAS above the federal limit, which is the main open concern.
What is the lead level in Riley County?▼
Among communities with a detection the median is 1.90 ppb, 13% of the 15 ppb action level. 3 reported none detected and 0 reported no result.
How many water systems serve Riley County?▼
8 community water systems serve 8 communities here.
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