Water system
West Carrollton City
EPA ID OH5702812 · Montgomery County · 8,361 people served · owned by a local government
West Carrollton City treats its own water from Great Miami Buried Valley Aquifer (wells).
The system's record
- Aquifer
- Great Miami Buried Valley Aquifer
- Active wells
- 3
- Serves
- 8,361 people · Montgomery County
- EPA ID
- OH5702812
About this area's water
Did you know
- West Carrollton is one of the few small Ohio systems that softens with membranes: a membrane filtration softening plant came online in early 2005 at the 1988 plant on Pierce Avenue.
- The aquifer under West Carrollton is officially rated highly susceptible to contamination -- no protective clay cap, and the water table sits less than 15 feet below the surface.
- The Great Miami Buried Valley Aquifer that West Carrollton pumps from was designated a U.S. EPA sole source aquifer in May 1988 and supplies more than a million people across nine counties.
- The city's drinking water plant and Montgomery County's regional wastewater plant are both inside West Carrollton; the county's Western Regional Water Reclamation Facility got a new screening and pretreatment building…
- In 2024 West Carrollton's lead 90th percentile came back at 0.0 ppb across 30 sample sites.
What it costs
$7.23 per 1,000 gallons
Typical household bill about $34 a month for water.
Ord. 3748 (passed 2-28-23), codified at §37.03, effective with the first quarter 2023 billing. Water is billed quarterly: a minimum charge covers 0-10,000 gallons ($65.95 for a…
Source: codelibrary.amlegal.com
Water quality & impurities
EPA compliance record
Lead at the tap: 90th-percentile result 0.4 ppb in 2024 (action level 15 ppb).
EPA health-based violations since 2015:
- 2024Lead and Copper Rule Revisions · lead service line inventory missing or incomplete (a records requirement, not a lead test result) · returned to compliance
3 violations of any kind logged since 2020: 2 for a report, record or notice that was missing, late or incomplete (the yearly water quality report, a public notice, lead line records); 1 health-based.
Projects & plans5
Recent and current work
- Membrane filtration softening plant · 2005 · completed
Brought online in early 2005; significantly reduced hardness in the finished water. - Acquisition of the former Appvion wastewater treatment site · 2012 · completed
27 acres at 4000 Hydraulic Road, PCB-contaminated from industrial use from the 1960s to the early 2000s. - Montgomery County SMART sewer program · $65 million · 2024 · completed
County project: a new pretreatment and screening facility at the Western Regional Water Reclamation Facility in West Carrollton plus a 70 MGD pump station on…
Source: westcarrollton.orgmcohio.orgdaytondailynews.com
Planned or needed
- Water Treatment Plant improvements · $8.8 million · 2025 · planned
Ohio EPA plan approval obtained; financed through the Ohio EPA Water Supply Revolving Loan Account. Replaces and modernizes treatment equipment more than 30… - Hydraulic Road site remediation and riverfront recreation project · 2025 · proposed
City plans to remediate, fill and cap the 27-acre former Appvion wastewater plant site for recreational use; total cost estimated above $10 million, with about…
Source: westcarrollton.orgdaytondailynews.comdaytondailynews.com
Sourcesverified
Compiled from the utility's own reports and public records, then independently re-checked against primary sources.
Main supplier in 1 ZIP code
Serves
Main water supplier in 1 ZIP code
- 45449 · West Carrollton and Dayton69% of residents
Also present in 1 more ZIP code
- 45342 · Miamisburg0% of residents
Population-weighted resident shares; a ZIP code can have more than one system on record. Recomputed from each ZIP's own system list, not from the map's cached footprint.
Buys from · Sells to
West Carrollton City does not buy water from another system on record; it treats its own source water.
No other system is on record buying water from West Carrollton City.
What the records show about West Carrollton City
Who runs it
EPA's record describes West Carrollton City as owned by a local government. It has 3,367 service connections and serves 8,361 people.
EPA classes it as a community water system, one that serves the same residents all year.
EPA's record says it has substantially implemented source water protection under Ohio's program, dating the program from 2023. Its office telephone on EPA's record is 937-475-8282.
Source: EPA Safe Drinking Water Information System (SDWIS), water system record.
How the water is treated
EPA's treatment table registers these steps for West Carrollton City: corrosion control, chlorine disinfection, iron and manganese removal, fluoridation, membrane filtration, and sand or media filtration.
The list is what each system registered with EPA for treatment plants EPA still shows as active, and it can lag a plant upgrade.
Source: EPA Safe Drinking Water Information System (SDWIS) treatment table (EPA Envirofacts, pulled September 2026).
Violations
EPA counts 1 health-based violation for West Carrollton City since 2015. Health-based means a contaminant above its legal limit or a required treatment step not carried out. It falls into 1 separate problem (one contaminant or rule in one year); the table lists it.
EPA logs 3 violations of any kind since 2020: 2 for a report, record or notice that was missing, late or incomplete (the yearly water quality report, a public notice, lead line records); 1 health-based.
| Year | Contaminant or rule | Kind | Measured | Limit | Status in EPA's record |
|---|---|---|---|---|---|
| 2024 | Lead and Copper Rule Revisions | lead service line inventory missing or incomplete (a records requirement, not a lead test result) | not on file | not on file | returned to compliance |
Source: EPA Safe Drinking Water Information System (SDWIS) violation records: health-based violations with compliance periods beginning in 2015 or later, all violations from 2020 or later (EPA Envirofacts, pulled September 2026).
Lead and copper at the tap
In the sampling period ending December 2024, the 90th-percentile lead result at West Carrollton City was 0.4 ppb, under both the current 15 ppb action level and the 10 ppb level that applies from 2027.
The highest result on file is 1.5 ppb, in the period ending December 2018.
EPA has 3 sampling periods on file for West Carrollton City since 2016, the first ending in 2018; no period was above 10 ppb.
Every water system has to inventory its service lines, the pipes from the main to each building. In the inventory West Carrollton City sent EPA, 3,513 lines are counted.
| Material | Lines |
|---|---|
| Lead | 0 |
| Galvanized, needing replacement | 0 |
| Unknown material | 1,582 |
| Not lead | 1,931 |
| All lines | 3,513 |
Systems sample taps in the homes most likely to have lead pipes or solder. The 90th-percentile result is the level nine in ten of the sampled homes were at or below. Lead comes mostly from service lines and house plumbing, not the source water, so a low result for the system does not clear an old house.
EPA's dashboard status for this inventory: reported all required service line types.
Source: EPA Safe Drinking Water Information System (SDWIS) lead and copper 90th-percentile results (EPA Envirofacts), sampling periods ending 2016 or later; EPA's service line inventory dashboard, Ohio's 2026 Q2 submission.
PFAS
EPA's fifth national round of testing (UCMR 5) took 2 samples of the water entering the pipes of West Carrollton City in 2023 to 2024 and measured 29 PFAS. No PFAS was detected, PFOA and PFOS (federal limit 4 ng/L each) among them.
Ohio EPA's own statewide sampling tested 1 plant of West Carrollton City (latest sample September 2020). Not one of the six PFAS tested (PFOA, PFOS, PFHxS, PFNA, GenX and PFBS) was detected.
Ohio EPA's current sampling status map lists 1 plant of West Carrollton City as sampled, most recently August 2026.
PFAS are the 'forever chemicals' from firefighting foam, plating shops and non-stick coatings. Results are for water leaving the plant, not your tap.
Source: EPA UCMR 5 occurrence data (final release, August 2026); Ohio EPA statewide PFAS sampling, 2019 to 2021, and its sampling status map.
Disinfection byproducts
Chlorine that disinfects water also reacts with organic matter to form byproducts. Two groups have federal limits: total trihalomethanes (TTHM, 80 µg/L) and five haloacetic acids (HAA5, 60 µg/L), judged on running yearly averages at each sampling site.
For TTHM, the average of West Carrollton City's samples in 2019, the last year it was sampled, was 10.3 µg/L. The worst yearly average was 24.1 µg/L and the highest single sample was 26.8 µg/L, from 38 samples taken from 2012 to 2019.
For HAA5, the average in the last year sampled was 1.2 µg/L. The worst yearly average was 2.6 µg/L and the highest single sample was 6.3 µg/L, from 38 samples.
| Byproduct | Limit | Latest yearly average | Worst yearly average | Highest sample | Samples |
|---|---|---|---|---|---|
| TTHM | 80 µg/L | 10.3 µg/L (2019) | 24.1 µg/L | 26.8 µg/L | 38 |
| HAA5 | 60 µg/L | 1.2 µg/L | 2.6 µg/L | 6.3 µg/L | 38 |
A yearly average of 0 means nothing was detected in that year's samples. EPA's file stops at 2019; Ohio EPA's Drinking Water Watch has newer results.
Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, distribution-system samples (non-detects counted as zero).
Nitrate, arsenic and radioactivity
Nitrate: the highest of 8 samples was 1.51 mg/L (as nitrogen) in 2013; in 2019, the last year sampled, the highest was 0.65 mg/L. No sample was over the limit of 10 mg/L. Nitrate above 10 is unsafe for infants.
Arsenic was not detected in 3 samples (limit 10 µg/L).
| Contaminant | Samples | Highest result | Limit | Samples over limit |
|---|---|---|---|---|
| Nitrate (as nitrogen) | 8 | 1.51 mg/L | 10 mg/L | 0 |
| Arsenic | 3 | not detected | 10 µg/L | 0 |
Measured in finished water: at the plant's entry points and in the distribution system; raw well and intake samples are left out. Non-detects count as zero.
Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, finished water.
Solvents and fuels
EPA's file holds results for all six solvent and fuel compounds it checked. Benzene, carbon tetrachloride, 1,2-dichloroethane, trichloroethylene, tetrachloroethylene, and vinyl chloride were not detected in 4 samples each.
| Compound | Limit | Samples | Detected in | Highest result | Samples over limit |
|---|---|---|---|---|---|
| Benzene | 5 µg/L | 4 | 0 of 4 | not detected | 0 |
| Carbon tetrachloride | 5 µg/L | 4 | 0 of 4 | not detected | 0 |
| 1,2-dichloroethane | 5 µg/L | 4 | 0 of 4 | not detected | 0 |
| Trichloroethylene (TCE) | 5 µg/L | 4 | 0 of 4 | not detected | 0 |
| Tetrachloroethylene (PCE) | 5 µg/L | 4 | 0 of 4 | not detected | 0 |
| Vinyl chloride | 2 µg/L | 4 | 0 of 4 | not detected | 0 |
"Not detected" means the lab's result was below what its method can measure, not that the compound is absent. Non-detects count as zero in the highest-result column.
Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, finished water.
Farm chemicals and metals
EPA's file holds results for 8 of the nine herbicides and metals it checked. Detected: barium in 2 of 3 samples, highest 47.3 µg/L (limit 2,000). Not detected: atrazine in 2 samples, alachlor in 2 samples, chromium in 3 samples, cadmium in 3 samples, mercury in 3 samples, selenium in 3 samples, thallium in 3 samples.
| Substance | Kind | Limit | Samples | Detected in | Highest result | Samples over limit |
|---|---|---|---|---|---|---|
| Atrazine | Farm chemical | 3 µg/L | 2 | 0 of 2 | not detected | 0 |
| Alachlor | Farm chemical | 2 µg/L | 2 | 0 of 2 | not detected | 0 |
| Chromium | Metal | 100 µg/L | 3 | 0 of 3 | not detected | 0 |
| Cadmium | Metal | 5 µg/L | 3 | 0 of 3 | not detected | 0 |
| Barium | Metal | 2,000 µg/L | 3 | 2 of 3 | 47.3 µg/L | 0 |
| Mercury | Metal | 2 µg/L | 3 | 0 of 3 | not detected | 0 |
| Selenium | Metal | 50 µg/L | 3 | 0 of 3 | not detected | 0 |
| Thallium | Metal | 2 µg/L | 3 | 0 of 3 | not detected | 0 |
Non-detects count as zero in the highest-result column.
Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, finished water.
Bacteria in the pipes
From 2012 to 2019, 0 of 1,030 routine total coliform samples taken in the distribution system at West Carrollton City tested positive (0%); in 2019, the last year on file, 0 of 120 did.
A positive coliform test is a warning sign, not a violation by itself. E. coli is a sign that human or animal waste may have reached the water. Coliform counts are routine samples only; E. coli counts include repeat samples.
Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, distribution-system presence/absence tests for total coliform and E. coli.
Fluoride
The Ohio Department of Health's report to the CDC (My Water's Fluoride) says West Carrollton City adjusts the fluoride level to the recommended level for preventing tooth decay.
EPA's treatment table lists fluoridation among the steps at West Carrollton City.
Measured fluoride: 0.98 mg/L on average at the plant's entry points in 2018 (in the range dentists aim for); samples ran from 0.98 to 1.04 mg/L across 3 samples in 2012 to 2019.
The recommended level for preventing tooth decay is 0.7 mg/L; the federal limit is 4 mg/L. The treatment list is what each system registered with EPA and can lag a plant upgrade.
Source: CDC My Water's Fluoride (fluoridation status as reported by the Ohio Department of Health, fetched September 2026); EPA Safe Drinking Water Information System (SDWIS) treatment table; EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, entry-point fluoride samples.
Lithium
Lithium was not detected in 2 UCMR 5 samples at West Carrollton City, last sampled in 2024 (the method reports from 9 µg/L).
Lithium is not regulated. EPA's draft health reference level is 10 µg/L, and it occurs naturally in deep groundwater, so well systems in the northwest run highest.
Source: EPA UCMR 5 occurrence data (final release, August 2026), samples from 2023 to 2025.
How well the service area is mapped
EPA estimated the service area of West Carrollton City with a computer model rather than drawing it from the utility's map, so its edges are approximate.
Counting the people who live in the ZIP codes it overlaps, this atlas estimates 13,085 residents are inside the boundary, 157% of the 8,361 people West Carrollton City reports serving.
The resident count is an estimate from 2020 Census ZIP-code populations, not a count of customers.
Source: EPA Service Area Boundaries; resident estimate by this atlas from ZIP-code overlap.
Photograph
On the map
Show this system's territory on the map — 2 ZIP codes in all.
Sources
U.S. EPA SDWIS and Community Water System Service Area Boundaries (v3, 2026), Ohio EPA primacy data, 2020 census blocks: the system serving most residents, traced through purchases to the treating utility; Ohio EPA 2023 Sewer and Water Rate Survey (Ohio State, May 2025) for household bills; Ohio EPA DEFA loan awards since 2016 for the loans paragraph · EPA SDWIS · EPA service area boundaries · Ohio EPA drinking water · Ohio EPA rate survey
EPA's own record for this system: Enforcement and Compliance History report for OH5702812 (EPA ECHO).
West Carrollton City's own pages: westcarrollton.org, mcdwater.org
Notable facts: westcarrollton.org, mcdwater.org, dam.assets.ohio.gov, mcohio.org
History: westcarrollton.org, westcarrollton.org, daytondailynews.com, daytondailynews.com
Water quality: westcarrollton.org
Planned work: westcarrollton.org, daytondailynews.com, daytondailynews.com
Capital projects: westcarrollton.org, mcohio.org, daytondailynews.com, daytondailynews.com
Rates: codelibrary.amlegal.com
Sewers: westcarrollton.org, codelibrary.amlegal.com, mcohio.org, daytondailynews.com
Treatment: westcarrollton.org, daytondailynews.com
Supply stress: westcarrollton.org, mcdwater.org, dam.assets.ohio.gov, daytondailynews.com
