Water system
Williamsburg Village
EPA ID OH1301411 · Clermont County · 2,490 people served · owned by a local government
Williamsburg Village buys its water from Clermont Public Water System.
The system's record
- Aquifer
- Little Miami River Aquifer; Ohio River Valley Aquifer
- Water bodies
- William H. Harsha Lake (East Fork Lake), East Fork Little Miami River, Little Miami River, Ohio River
- Raw intakes
- Clermont Co Bmwt Fork Littl
- Active wells
- 24
- Serves
- 133,059 people · Clermont County
- EPA ID
- OH1302212
SDWIS intake name 'IN FROM CLERMONT CO BMWT EAST FORK LITTL' confirmed: Clermont County's Bob McEwen Water Treatment Plant draws surface water from William H. Harsha Lake, an impoundment of the East Fork Little Miami River.
About this area's water
Did you know
- Williamsburg takes its drinking water from Clermont County through two separate physical cross-connections, on SR 276 and Old SR 32, rather than a single feed.
- Its emergency backup is a tie to a different county's rural water association - Brown County Rural Water, which pumps from 13 wells in the Ohio River Valley Aquifer - so the fallback supply is groundwater rather than…
- The village claims the oldest standing structure in Clermont County: an early-1800s stone dairy house at Harmony Hill, 299 South Third Street.
- Williamsburg buys every gallon it drinks but treats its own sewage at a village-owned wastewater plant.
- The village was founded in 1796 by General William Lytle and named for Williamsburg, Virginia.
Source: williamsburgohio.orgwilliamsburgohio.orgen.wikipedia.org
History4
- 1796Village founded by General William Lytle of Cincinnati and named for Williamsburg, Virginia.
- early 1800sStone dairy house at Harmony Hill, 299 South Third Street, built; the village describes it as the oldest standing structure in Clermont County.
- undatedWilliamsburg served as the original county seat of Clermont County before the seat moved to Batavia. (The village history page states the fact without a date; no primary source located for the…
- 2025CCR reports the village buys all its finished water in bulk from Clermont County's Bob McEwen Water Treatment Plant through two cross-connections (State Route 276 and Old State Route 32), with an…
Source: williamsburgohio.orgen.wikipedia.orgwilliamsburgohio.org
Treatment & pressure
How it is treated
No drinking water treatment plant of its own. The village buys finished water from Clermont County's Bob McEwen Water Treatment Plant (Clermont County PWSID 1302212), which treats surface water drawn from William H. Harsha Lake on the East Fork Little Miami River using granular activated carbon…
Source: williamsburgohio.orgwilliamsburgohio.org
Water pressure
Not published. Neither the 2025 CCR, the water/sewer rate page, nor the Public Works page states a system pressure or shows a pressure-zone map.
What it costs
$11.94 per 1,000 gallons
Typical household bill about $29 a month for water.
In-village residential: $28.54 minimum covering the first 3,000 gallons, then $11.94 per 1,000 gallons above that. Outside the village: $38.92 minimum per 3,000 gallons plus…
Source: williamsburgohio.org
Water quality & impurities8
| Contaminant | Level | Limit | Year |
|---|---|---|---|
| Total Trihalomethanes (TTHM) Village of Williamsburg's own distribution system; range 31.3-66.5 ppb. | 49.93 ppb | 80 ppb MCL | 2025 |
| Haloacetic Acids (HAA5) Village's own distribution system; range 13.9-39.0 ppb. By-product of chlorination at the county plant. | 25.7 ppb | 60 ppb MCL | 2025 |
| Total chlorine Village distribution system; range 0.24-1.92 ppm. | 1.24 ppm | MRDL 4 ppm | 2025 |
| Lead (90th percentile) 0 of 10 samples exceeded the action level; range <0.4-3.3 ppb. | 2.6 ppb | 15 ppb action… | 2025 |
| Copper (90th percentile) 0 of 10 samples exceeded the action level; range 0.003-0.109 ppm. Corrected: the earlier draft dated this 2023, which… | 0.071 ppm | 1.3 ppm action… | 2025 |
| Total Trihalomethanes (TTHM) - Clermont… Reported in the Clermont County table of the same CCR. This, not the village's 49.93 ppb, is the reading that sits… | 73.32 ppb | 80 ppb MCL | 2025 |
| Nitrate - Clermont County wholesale… Appears only in the Clermont County table; Williamsburg does not report its own nitrate result. Well under the MCL. | 1.32 ppm | 10 ppm MCL | 2025 |
| Fluoride - Clermont County wholesale… Appears only in the Clermont County table. Water additive plus natural source. | 0.99 ppm | 4 ppm MCL | 2025 |
Source: williamsburgohio.org
EPA compliance record
Lead at the tap: 90th-percentile result 2.6 ppb in 2025 (action level 15 ppb).
EPA health-based violations since 2015:
- 2021Total trihalomethanes (TTHM) · exceeded a maximum contaminant level · measured 0.081 MG/L (limit 0.08 MG/L) · returned to compliance
3 violations of any kind logged since 2020, 2 of them paperwork (monitoring, reporting, public notice or consumer report).
EPA compliance record · Clermont Public Water System (treats the water)
Lead at the tap: 90th-percentile result 2.1 ppb in 2023 (action level 15 ppb).
EPA health-based violations since 2015:
- 2018Total trihalomethanes (TTHM) · exceeded a maximum contaminant level · measured 0.081 MG/L (limit 0.08 MG/L) · returned to compliance
2 violations of any kind logged since 2020, 2 of them paperwork (monitoring, reporting, public notice or consumer report).
Supply stress
Williamsburg has no source of its own. All routine supply is finished surface water from Clermont County's Harsha Lake / East Fork Little Miami River intake, reaching the village through just two cross-connections (SR 276 and Old SR 32). The published fallback is an emergency connection to Brown County Rural Water Association's Ohio…
Sewers
Sanitary
The village owns and operates its own wastewater treatment plant; the Public Works Supervisor is the operator in charge. Sewer rates are $31.92 minimum per 3,000 gallons plus $11.08 per 1,000 gallons over, with a $3,400 capacity/installation fee for single-family residential and a $25 inspection fee (plus a $1,517.95 special valve…
Storm
Not established. Public Works lists street maintenance among its duties but publishes no stormwater program, fee, or flooding history. (The earlier draft's reference to a 'Streets/Stormwater' page with a separate function could not be substantiated.)
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
- 45176 · Williamsburg41% of residents
Also present in 1 more ZIP code
- 45103 · Union Township and Batavia3% 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
Williamsburg Village buys its water from Clermont Public Water System.
No other system is on record buying water from Williamsburg Village.
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
Notable facts: williamsburgohio.org, williamsburgohio.org, en.wikipedia.org
History: williamsburgohio.org, en.wikipedia.org, williamsburgohio.org
Water quality: williamsburgohio.org
Water pressure: williamsburgohio.org, williamsburgohio.org
Rates: williamsburgohio.org
Sewers: williamsburgohio.org, williamsburgohio.org
Treatment: williamsburgohio.org, williamsburgohio.org
Supply stress: williamsburgohio.org, williamsburgohio.org