Water system
Dillonvale
EPA ID OH4100512 · Jefferson County · 665 people served · owned by a local government
Dillonvale treats its own water from Groundwater wells (2 wells).
The system's record
The Ohio Department of Health's fluoridation report (CDC My Water's Fluoride) lists Dillonvale as buying its water from Mount Pleasant; EPA's inventory shows its own sources as primary with Mount Pleasant as an emergency connection. The two records may reflect a blend or a recent switch.
- Active wells
- 2
- Serves
- 665 people · Jefferson County
- EPA ID
- OH4100512
About this area's water
Did you know
- Dillonvale was originally platted as "Annapolis" in 1816 and only took its current name after the railroad arrived in 1889.
- The village lies within the Weirton-Steubenville metropolitan area, part of Ohio's Appalachian coal country.
- Population has fallen more than 60% since its 1940 peak of 1,652 residents.
- The village runs a dedicated wastewater treatment plant on Township Road 1197, separate from its water department.
History3
- 1816Community founded as "Annapolis" in Jefferson County.
- 1889Wheeling and Lake Erie Railway arrived; town replatted and renamed Dillon, later Dillonvale.
- 1940Population peaked at 1,652 before a long decline to under 600 today.
Source: en.wikipedia.org
Treatment & pressure
How it is treated
Dillonvale draws on two groundwater wells; detected disinfection byproducts (TTHM 5.03 ppb, well under the 80 ppb limit, per EWG's EPA-sourced data) imply chlorination, though we found no published treatment-train description. The village runs separate Water and Sewer Departments; the Sewer…
Source: ewg.orgvillageofdillonvale.comtap-truth.com
Water pressure
Not published — no CCR or engineering-report pressure figures were located.
What it costs
We found no metered rate schedule. Water bills are issued bimonthly and bundle a trash charge on the same statement; a 10% penalty applies to balances unpaid past the due date…
Source: villageofdillonvale.com
Water quality & impurities7
| Contaminant | Level | Limit | Year |
|---|---|---|---|
| Total trihalomethanes (TTHM) Well below the legal limit. | 5.03 ppb | 80 | 2018-202… |
| Nitrate Under 10% of the legal limit. | 0.961 ppm | 10 | 2018-202… |
| Combined radium (-226/-228) Well under the legal limit; naturally occurring. | 0.36 pCi/L | 5 | 2018-202… |
| Bromoform | 2.60 ppb | none (no… | 2018-202… |
| Dibromochloromethane | 1.93 ppb | none (no… | 2018-202… |
| Bromodichloromethane | 0.625 ppb | none (no… | 2018-202… |
| Barium Well below the legal limit. | 22.0 ppb | 2000 | 2018-202… |
Source: ewg.org
EPA compliance record
Lead at the tap: 90th-percentile result 2.4 ppb in 2025 (action level 15 ppb).
EPA record: no health-based violations since 2015.
9 violations of any kind logged since 2020: 5 for required testing that was missed or reported late; 4 for a report, record or notice that was missing, late or incomplete (the yearly water quality report, a public notice, lead line records).
Supply stress
No drought, PFAS, or acute nitrate stress was documented. Nitrate was detected at 0.961 ppm, under 10% of the 10 ppm MCL — unremarkable. Combined radium-226/228 measured 0.36 pCi/L, well under the 5 pCi/L limit. Dillonvale sits in the historic Ohio River Valley coal belt within the Weirton-Steubenville metro area, but no documented case…
Source: ewg.org
Sewers
Sanitary
Dillonvale operates its own Sewer Department and a wastewater treatment plant at 19 Township Rd. 1197, distinct from the Water Department (villageofdillonvale.com/services).
Source: villageofdillonvale.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 2 ZIP codes
- 43948 · Smithfield Township and Smithfield100% of residents
- 43917 · Smithfield Township and Dillonvale23% of residents
Also present in 1 more ZIP code
- 43943 · Warren Township and Rayland1% 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
Dillonvale does not buy water from another system on record; it treats its own source water.
No other system is on record buying water from Dillonvale.
What the records show about Dillonvale
Who runs it
EPA's record describes Dillonvale as owned by a local government. It has 395 service connections and serves 665 people.
EPA classes it as a community water system, one that serves the same residents all year.
Source: EPA Safe Drinking Water Information System (SDWIS), water system record.
How the water is treated
EPA's treatment table registers these steps for Dillonvale: chlorine disinfection.
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's record shows no health-based violations for Dillonvale since 2015.
EPA logs 9 violations of any kind since 2020: 5 for required testing that was missed or reported late; 4 for a report, record or notice that was missing, late or incomplete (the yearly water quality report, a public notice, lead line records).
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 2025, the 90th-percentile lead result at Dillonvale was 2.4 ppb, under both the current 15 ppb action level and the 10 ppb level that applies from 2027.
The highest result on file is 4.1 ppb, in the period ending June 2022.
EPA has 8 sampling periods on file for Dillonvale 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 Dillonvale sent EPA, 446 lines are counted.
| Material | Lines |
|---|---|
| Lead | 0 |
| Galvanized, needing replacement | 0 |
| Unknown material | 0 |
| Not lead | 446 |
| All lines | 446 |
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
Ohio EPA's own statewide sampling tested 1 plant of Dillonvale (latest sample July 2020). Not one of the six PFAS tested (PFOA, PFOS, PFHxS, PFNA, GenX and PFBS) was detected.
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 Dillonvale's samples in 2019, the last year it was sampled, was 5.1 µg/L. The worst yearly average was 5.1 µg/L and the highest single sample was 6.4 µg/L, from 16 samples taken from 2012 to 2019.
For HAA5, the average in the last year sampled was 0 µg/L. The worst yearly average was 0 µg/L and the highest single sample was 0 µg/L, from 16 samples.
| Byproduct | Limit | Latest yearly average | Worst yearly average | Highest sample | Samples |
|---|---|---|---|---|---|
| TTHM | 80 µg/L | 5.1 µg/L (2019) | 5.1 µg/L | 6.4 µg/L | 16 |
| HAA5 | 60 µg/L | 0 µg/L | 0 µg/L | 0 µg/L | 16 |
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 9 samples was 1.05 mg/L (as nitrogen) in 2014; in 2019, the last year sampled, the highest was 1 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) | 9 | 1.05 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 3 samples each.
| Compound | Limit | Samples | Detected in | Highest result | Samples over limit |
|---|---|---|---|---|---|
| Benzene | 5 µg/L | 3 | 0 of 3 | not detected | 0 |
| Carbon tetrachloride | 5 µg/L | 3 | 0 of 3 | not detected | 0 |
| 1,2-dichloroethane | 5 µg/L | 3 | 0 of 3 | not detected | 0 |
| Trichloroethylene (TCE) | 5 µg/L | 3 | 0 of 3 | not detected | 0 |
| Tetrachloroethylene (PCE) | 5 µg/L | 3 | 0 of 3 | not detected | 0 |
| Vinyl chloride | 2 µg/L | 3 | 0 of 3 | 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. Not detected: atrazine, alachlor, chromium, cadmium, barium, mercury, selenium, and thallium, in 3 samples each.
| Substance | Kind | Limit | Samples | Detected in | Highest result | Samples over limit |
|---|---|---|---|---|---|---|
| Atrazine | Farm chemical | 3 µg/L | 3 | 0 of 3 | not detected | 0 |
| Alachlor | Farm chemical | 2 µg/L | 3 | 0 of 3 | 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 | 0 of 3 | not detected | 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 95 routine total coliform samples taken in the distribution system at Dillonvale tested positive (0%); in 2019, the last year on file, 0 of 12 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 Dillonvale buys its water from Mount Pleasant, a system that has fluoride from natural sources, but at a level below what is recommended for preventing tooth decay, and does not adjust it. The level it reports is 0.2 mg/L.
EPA's treatment table lists no fluoridation step at Dillonvale.
Measured fluoride: every sample at the plant's entry points in 2018 was below the 0.2 mg/L reporting limit; detected samples in earlier years ran at 0.75 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.
How well the service area is mapped
EPA estimated the service area of Dillonvale with a computer model rather than drawing it from the utility's map, so its edges are approximate.
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 — 3 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 OH4100512 (EPA ECHO).
Notable facts: en.wikipedia.org, villageofdillonvale.com
History: en.wikipedia.org
Water quality: ewg.org
Rates: villageofdillonvale.com
Sewers: villageofdillonvale.com
Treatment: ewg.org, villageofdillonvale.com, tap-truth.com
Supply stress: ewg.org