States › Ohio › Hamilton County

Hamilton County, OH Water Quality

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

📅 2026 Report 🔄 Data updated 2026 Q2 📍 8 water systems · 86 cities
⚠️
Caution Advised — Some Systems Need Attention

Some systems have elevated lead levels or active violations. Check your specific city below.

C

Hamilton County Earns a C

Hamilton County: 86 communities across 8 water systems. 100.0% have no open violations.

  • Median lead where detected: 2.06 ppb
  • 80 communities with a lead detection, 6 reporting none detected
  • 76 communities with PFAS above the federal limit
  • 4 with significant inspection deficiencies
  • 100.0% of communities have no open violations
2.06 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
  • Cleves
    Not detected
    No federal limits exceeded on record
    A
  • North Bend
    Not detected
    No federal limits exceeded on record
    A
  • Shawnee
    Not detected
    No federal limits exceeded on record
    A
  • Hooven
    Not detected
    No federal limits exceeded on record
    A
  • Addyston
    Not detected
    No federal limits exceeded on record
    A
⚠ Needs Attention
  • The Village of Indian Hill
    1.65 ppb
    PFAS above the limit at 1 of 1 sampling points
    D
  • Madeira
    1.65 ppb
    PFAS above the limit at 1 of 1 sampling points
    D
  • Terrace Park
    1.65 ppb
    PFAS above the limit at 1 of 1 sampling points
    D
  • Camp Dennison
    1.65 ppb
    PFAS above the limit at 1 of 1 sampling points
    D
  • Loveland
    4.21 ppb
    PFAS above the limit at 1 of 1 sampling points
    D
County Lead Level — Median 2.06 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 2.06 ppb — 13.7% of the federal action level
Systems by Lead Level
Under 5 ppb
80
No Data
6

All Cities in Hamilton County

Cincinnati 2.06 ppb C
Forest Park 2.06 ppb C
White Oak 2.06 ppb C
Norwood 1.72 ppb A
Bridgetown 2.06 ppb C
Blue Ash 2.06 ppb C
Loveland 4.21 ppb D
Finneytown 2.06 ppb C
Sharonville 2.06 ppb C
Dent 2.06 ppb C
Monfort Heights 2.06 ppb C
Mack 2.06 ppb C
Springdale 2.06 ppb C
Northbrook 2.06 ppb C
Montgomery 2.06 ppb C
Forestville 2.06 ppb C
Harrison 0.70 ppb A
Reading 1.90 ppb A
North College Hill 2.06 ppb C
Cheviot 2.06 ppb C
Kenwood 2.06 ppb C
Groesbeck 2.06 ppb C
Dry Run 2.06 ppb C
Northgate 2.06 ppb C
Mount Healthy 2.06 ppb C
Covedale 2.06 ppb C
The Village of Indian Hill 1.65 ppb D
Madeira 1.65 ppb D
Deer Park 2.06 ppb C
Turpin Hills 2.06 ppb C
Miami Heights 2.06 ppb C
New Burlington 2.06 ppb C
Delhi Hills 2.06 ppb C
Silverton 2.06 ppb C
Pleasant Run 2.06 ppb C
Pleasant Run Farm 2.06 ppb C
Cherry Grove 2.06 ppb C
St. Bernard 2.06 ppb C
Taylor Creek 2.06 ppb C
Salem Heights 2.06 ppb C
Amberley 2.06 ppb C
Golf Manor 2.06 ppb C
Woodlawn 2.06 ppb C
Fruit Hill 2.06 ppb C
Greenhills 2.06 ppb C
Sherwood 2.06 ppb C
Mariemont 2.06 ppb C
Dillonvale 2.06 ppb C
Cleves Not detected A
Delshire 2.06 ppb C
Lincoln Heights 2.06 ppb C
Sixteen Mile Stand 2.06 ppb C
Mount Healthy Heights 2.06 ppb C
Dry Ridge 2.06 ppb C
Newtown 2.06 ppb C
Evendale 2.06 ppb C
Terrace Park 1.65 ppb D
Wyoming 2.06 ppb C
Glendale 0.70 ppb B
Elmwood Place 2.06 ppb C
Rossmoyne 2.06 ppb C
Fairfax 2.06 ppb C
Dunlap 2.06 ppb C
New Baltimore 2.06 ppb C
Highpoint 2.06 ppb C
Skyline Acres 2.06 ppb C
Blue Jay 2.06 ppb C
Coldstream 2.06 ppb C
Miamitown 2.06 ppb C
Lockland 2.06 ppb C
Pleasant Hills 2.06 ppb C
North Bend Not detected A
Grandview 2.06 ppb C
Arlington Heights 2.06 ppb C
Shawnee Not detected A
Concorde Hills 2.06 ppb C
Madison Place 2.06 ppb C
New Haven 2.06 ppb C
Ridgewood 2.06 ppb C
Hooven Not detected A
Brecon 2.06 ppb C
Camp Dennison 1.65 ppb D
Addyston Not detected A
Elizabethtown Not detected A
Remington 2.06 ppb C
Plainville 2.06 ppb C
Showing 86 cities
No active violations Active violations

About Hamilton County Drinking Water

Hamilton County is served by 8 water systems covering 86 communities. No community here has an open violation on record.

Of the communities reporting lead results, 80 recorded a detection, with a median of 2.06 ppb — 14% of the federal action level. 6 reported none detected, which means below the laboratory limit rather than an absence of lead.

76 of 86 communities have PFAS above the limits EPA set in 2024, measured as a running annual average at each sampling point. State inspectors recorded significant deficiencies at 4 of them.

Frequently Asked Questions

Is Hamilton County tap water safe to drink?▼
No community in Hamilton County has an open violation on record. 76 of 86 have PFAS above the federal limit, which is the main open concern.
What is the lead level in Hamilton County?▼
Among communities with a detection the median is 2.06 ppb, 14% of the 15 ppb action level. 6 reported none detected and 0 reported no result.
How many water systems serve Hamilton County?▼
8 community water systems serve 86 communities here.
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