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Brown County, OH Water Quality

Water quality data for 7 public water systems serving Brown County, Ohio — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 7 water systems · 7 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

Brown County Earns a B

Brown County: 7 communities across 7 water systems. 85.7% have no open violations.

  • Median lead where detected: 1.25 ppb
  • 6 communities with a lead detection, 1 reporting none detected
  • 1 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 85.7% of communities have no open violations
1.25 ppb
Median Lead Level
County-wide, 90th percentile
7
Water Systems
Active CWS & NTNCWS
85%
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
  • Georgetown
    0.60 ppb
    No federal limits exceeded on record
    A
  • Mount Orab
    1.90 ppb
    No federal limits exceeded on record
    A
  • Lake Waynoka
    1.20 ppb
    2 health-based violations since 2015
    A
  • Sardinia
    1.30 ppb
    Copper above the 1,300 ppb action level
    B
  • Hamersville
    Not detected
    Copper above the 1,300 ppb action level
    B
⚠ Needs Attention
  • Lake Lorelei
    1.30 ppb
    PFAS above the limit at 2 of 2 sampling points
    D
  • Fayetteville
    0.80 ppb
    1 violation currently open
    C
  • Sardinia
    1.30 ppb
    Copper above the 1,300 ppb action level
    B
  • Hamersville
    Not detected
    Copper above the 1,300 ppb action level
    B
  • Lake Waynoka
    1.20 ppb
    2 health-based violations since 2015
    A
County Lead Level — Median 1.25 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 1.25 ppb — 8.3% of the federal action level
Systems by Lead Level
Under 5 ppb
6
No Data
1

All Cities in Brown County

Georgetown 0.60 ppb A
Mount Orab 1.90 ppb A
Lake Waynoka 1.20 ppb A
Lake Lorelei 1.30 ppb D
Sardinia 1.30 ppb B
Hamersville Not detected B
Fayetteville 0.80 ppb C
Showing 7 cities
No active violations Active violations

About Brown County Drinking Water

Brown County is served by 7 water systems covering 7 communities. 86% have no open violations.

Of the communities reporting lead results, 6 recorded a detection, with a median of 1.25 ppb — 8% of the federal action level. 1 reported none detected, which means below the laboratory limit rather than an absence of lead.

1 of 7 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 Brown County tap water safe to drink?▼
86% of communities have no open violation. 1 of 7 have PFAS above the federal limit, which is the main open concern.
What is the lead level in Brown County?▼
Among communities with a detection the median is 1.25 ppb, 8% of the 15 ppb action level. 1 reported none detected and 0 reported no result.
How many water systems serve Brown County?▼
7 community water systems serve 7 communities here.
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