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Counties → Ohio

Miami County, Ohio

SDWIS compliance plate

Sheet OH109 · Miami County 57 sys · 4,277 viol · #605/3254

VIOL-SEVERE · HEALTH-MID · RANK-TOP · PHOTO-FINISH · PFAS-LOW · SRC-GW · SYS-MID · BOOK-FULL

  • VIOL-SEVERE 91.2% flagged
  • HEALTH-MID 21.4% health
  • RANK-TOP #605/3254
  • PHOTO-FINISH ±0.1 pp
  • PFAS-LOW 20.0% detect
  • SRC-GW GW lead 98%
  • SYS-MID 57 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Henry County (+ 0.1 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Miami County ranks #605 of 3,254 counties by people served, and #24 of 88 counties in Ohio. See methodology · corpus placement.

Miami County standing, lower-flagged corpus third

Flagged-system rate 91.2% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 21.4% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 20.0% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #605 of 3,254 · #24 of 88 in Ohio.

Flagged-rate neighbourhood around Miami County

Lowest/highest poles plus in-state counties nearest Miami County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.

0% 20% 40% 60% 80% 100% Fayette · lowest Miami · this county Jefferson · near Vinton · highest 78.6% 90.8% 91.2% 91.3% 91.4% 91.4% 100%

Source: EPA SDWIS (county aggregates) As of 2026-05-15

Water Systems

System Name Population Violations PFAS
Troy City PWS 26,305 5 Clean
Nawa 24,766 11 Clean
Piqua City PWS 20,354 41 Detected
West Milton Village PWS 4,890 330 Clean
Miami Co-Camp Troy PWS 3,742 20 Clean
Covington Village PWS 2,718 34 -
Miami Co-N25a Extension 2,367 11 -
Miami East Schools PWS 1,430 161 -
Pleasant Hill Village PWS 1,226 34 -
Miami Co-Deer Cliff Run PWS 526 15 -
Bethel Township Water System PWS 521 7 -
Laura Village PWS 487 192 -
Fletcher Village PWS 461 38 -
Stillwater Prairie Reserve PWS 250 3 -
Dayton Ohio Fm Group 219 10 -
Splash Club of Troy 200 80 -
Homestead Golf Course 200 215 -
Rolling Hills Girl Scout Camp 200 196 -
Garbrys Big Woods Reserve Wetland PWS 200 12 -
Charleston Falls Preserve - Restroom PWS 200 0 -
Monroe Township Water & Sewer Dist PWS 198 5 -
Old German Baptist Brethren Church PWS 180 0 -
Kingdom Hall of Jehovahs Witnesses-Troy 157 30 -
Indian Hills 4H Camp PWS 151 127 -
St. Teresa of Infant Jesus PWS 150 27 -
First Baptist Church of New Carlisle-Day 145 15 -
West Charleston Church of the Brethren 145 10 -
Brukner Nature Center 135 20 -
Poor Farmers Camp 100 10 -
Amvets Post 88 100 11 -
Fulton Farm PWS 100 27 -
VFW 6557 PWS 100 7 -
Olde English Outfitters 95 0 -
Stillwater Community Church PWS 90 10 -
Piqua Christian Church 85 63 -
36 Skate Club 80 21 -
Four Winds Gospel Assembly 75 79 -
The Barn Ministries Inc 75 13 -
Elizabeth Township Community Center 71 479 -
Northwoods Mhc 70 485 -
Country Meadows Condo. 65 20 -
Aileron 65 7 -
A and R Reck Mobile Home Park 50 469 -
Troy Fish and Game Club 50 18 -
Ginghamsburg UMC South PWS 50 141 -
Homestead Golf Course Restroom PWS 50 98 -
Friendship Community Church 45 30 -
Holly's Cafe & Carry Out 45 54 -
Seventh Day Adventist School 40 93 -
Angstrom Metal Stampings, LLC 40 367 -

Compare beyond Ohio

Lower-flagged peers for Miami County

Cross-state counties nearest Miami County on flagged-system share (91.2%) and cumulative violation count (4,277). In-state neighbours stay on the compliance plate above.

Similar flagged-system rate

Nearest cross-state counties by % of SDWIS systems with at least one violation on record.

4 peers

Similar violation load

Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).

4 peers

Read our methodology · Check your water system - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.