Search city, ZIP, contaminant⌘KFind my water
Updated 2026-10-15
County water report

Montgomery County Water Quality: 6 Cities Ranked by the Records

Montgomery County, Ohio: 6 city reports built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.

Find my systemOpen on the mapPrivate wells in Montgomery County
Across the county's systems

Highest result for each contaminant

One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.

Perfluorooctanesulfonic acid (PFOS)Detected in 2 systems of 6 tested4.0 ng/L federal MCL (2024) · US EPAHighest10 ng/L
Perfluorohexanesulfonic acid (PFHxS)Detected in 2 systems of 6 tested10 ng/L federal MCL (2024) · US EPAHighest9.8 ng/L
Lead (90th percentile)Detected in 3 systems of 6 tested15 µg/L federal action level · US EPAHighest2.3 µg/L
Perfluorobutanesulfonic acid (PFBS)Detected in 2 systems of 6 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest3 ng/L
Perfluorohexanoic acid (PFHxA)Detected in 2 systems of 6 tested400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLEHighest5.2 ng/L
Perfluoropentanoic acid (PFPeA)Detected in 2 systems of 6 testedNo federal or state limit; shown for transparencyHighest4.6 ng/L
25 substances tested, none detected in any systemShow

Tested in these 6 systems: DAYTON PUBLIC WATER SYSTEM, ENGLEWOOD CITY PWS, HUBER HEIGHTS PUBLIC WATER SYSTEM, MIAMISBURG CITY PWS, MONTGOMERY COUNTY WATER SERVICES 2 PWS, WEST CARROLLTON CITY PWS

  • 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
  • 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
  • 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
  • 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
  • 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
  • 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
  • Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
  • Lithium
  • N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
  • N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
  • Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
  • Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
  • Perfluoro-3-methoxypropanoic acid (PFMPA)
  • Perfluoro-4-methoxybutanoic acid (PFMBA)
  • Perfluorobutanoic acid (PFBA)
  • Perfluorodecanoic acid (PFDA)
  • Perfluorododecanoic acid (PFDoA)
  • Perfluoroheptanesulfonic acid (PFHpS)
  • Perfluoroheptanoic acid (PFHpA)
  • Perfluorononanoic acid (PFNA)
  • Perfluorooctanoic acid (PFOA)
  • Perfluoropentanesulfonic acid (PFPeS)
  • Perfluorotetradecanoic acid (PFTA)
  • Perfluorotridecanoic acid (PFTrDA)
  • Perfluoroundecanoic acid (PFUnA)
6 cities

Cities ranked by the records

Showing 6 of 6 cities · scores are system-level, not tap tests

Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.

PFAS in Montgomery County2 of 6 city reports had a PFAS sample above a 2024 EPA limit
  1. Dayton10 ng/L
  2. Trotwood7.6 ng/L
4.0 ng/L federal MCL · PFOS, ng/LPFAS in Ohio
Lead

0of 6 cities above the 15 µg/L action level

Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.

Lead in Ohio
Who supplies the county

Largest water systems

  1. DaytonDAYTON PUBLIC WATER SYSTEM · OH5703512
    141,407 served
  2. TrotwoodMONTGOMERY COUNTY WATER SERVICES 2 PWS · OH5701503
    83,033 served
  3. Huber HeightsHUBER HEIGHTS PUBLIC WATER SYSTEM · OH5703612
    43,439 served
  4. MiamisburgMIAMISBURG CITY PWS · OH5701212
    19,790 served
  5. EnglewoodENGLEWOOD CITY PWS · OH5700812
    13,463 served
  6. West CarrolltonWEST CARROLLTON CITY PWS · OH5702812
    8,361 served
Questions

Frequently asked

How does Montgomery County tap water compare across cities?

PurityMap ranks 6 cities in Montgomery County by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Huber Heights's main water system: HUBER HEIGHTS PUBLIC WATER SYSTEM · PWSID OH5703612 · Purity Score 100 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.

How many Montgomery County cities had a PFAS sample above a 2024 EPA limit?

2 of 6 Montgomery County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Dayton (PFOS 10 ng/L), Trotwood (PFOS 7.6 ng/L). That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation. PFAS were detected at any level in 2.

Is there lead in Montgomery County tap water?

Utilities report lead as a 90th-percentile result from home taps. 3 of 6 Montgomery County cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.

Next step

Follow Montgomery County's water

Get an email when a city record in the county changes. Or go straight to the filters certified for what was found here.

Filters certified for PFAS
FOLLOW THIS COUNTY

Record changes only

We email when places in Montgomery County get new results. Unsubscribe any time.

Follow Montgomery County's water →