States › Oklahoma › Stephens County

Stephens County, OK Water Quality

Water quality data for 6 public water systems serving Stephens County, Oklahoma — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 6 water systems · 9 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

Stephens County Earns a B

Stephens County: 9 communities across 6 water systems. 100.0% have no open violations.

  • Median lead where detected: 1.39 ppb
  • 3 communities with a lead detection, 6 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 1 with significant inspection deficiencies
  • 100.0% of communities have no open violations
1.39 ppb
Median Lead Level
County-wide, 90th percentile
6
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
  • Sunray
    0.96 ppb
    No federal limits exceeded on record
    B
  • Marlow
    2.25 ppb
    1 health-based violation since 2015
    A
  • Central High
    Not detected
    2 health-based violations since 2015
    A
  • Bray
    Not detected
    2 health-based violations since 2015
    A
  • Loco
    Not detected
    18 health-based violations since 2015
    B
⚠ Needs Attention
  • Velma
    1.39 ppb
    3 significant inspection deficiencies
    B
  • Loco
    Not detected
    18 health-based violations since 2015
    B
  • Duncan
    Not detected
    50 health-based violations since 2015
    B
  • Comanche
    Not detected
    18 health-based violations since 2015
    B
  • Empire City
    Not detected
    18 health-based violations since 2015
    B
County Lead Level — Median 1.39 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 1.39 ppb — 9.3% of the federal action level
Systems by Lead Level
Under 5 ppb
3
No Data
6

All Cities in Stephens County

Duncan Not detected B
Marlow 2.25 ppb A
Central High Not detected A
Bray Not detected A
Sunray 0.96 ppb B
Comanche Not detected B
Empire City Not detected B
Velma 1.39 ppb B
Loco Not detected B
Showing 9 cities
No active violations Active violations

About Stephens County Drinking Water

Stephens County is served by 6 water systems covering 9 communities. No community here has an open violation on record.

Of the communities reporting lead results, 3 recorded a detection, with a median of 1.39 ppb — 9% of the federal action level. 6 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 1 of them.

Frequently Asked Questions

Is Stephens County tap water safe to drink?▼
No community in Stephens County has an open violation on record. No community has PFAS above the federal limit on record.
What is the lead level in Stephens County?▼
Among communities with a detection the median is 1.39 ppb, 9% of the 15 ppb action level. 6 reported none detected and 0 reported no result.
How many water systems serve Stephens County?▼
6 community water systems serve 9 communities here.
← Back to Oklahoma water quality overview