Water system
Rio Grande
EPA ID OH2700316 · Gallia County · 830 people served
Rio Grande buys its water from Gallia Co. Rural Water Association.
The system's record
- Aquifer
- Ohio River Valley Aquifer
- Active wells
- 10
- Serves
- 20,995 people · Gallia County
- EPA ID
- OH2700012
Groundwater from 10 wells in two well fields (susceptibility rated high and moderate) drawing on the Ohio River valley buried aquifer, not directly from the Ohio River.
About this area's water
Did you know
- Despite its name, Rio Grande commemorates the Mexican-American War rather than sitting near the actual Rio Grande river.
- The village flag is a variant of the Flag of Wales, reflecting heavy 1830s-40s Welsh immigrant settlement.
- The first Bob Evans restaurant operated as a truck-stop diner in Rio Grande before the chain expanded nationally, per Wikipedia.
- EPA records show Rio Grande's own Indian Creek Reservoir intake -- once a supplemental surface-water source with its own 'Rio Grande WTP' -- was taken offline in 2004; today the village's water arrives entirely through…
Source: en.wikipedia.orgdata.epa.gov
History5
- 1818-1840sWelsh immigrants began settling the area from 1818, with over 3,000 arriving from Welsh parishes during the 1830s-40s, giving the village its lasting Welsh heritage (per Wikipedia).
- 1874Village of Rio Grande formally established (July 6), named to commemorate the Mexican-American War (per Wikipedia).
- 2004The village's own surface-water intake on Indian Creek Reservoir was deactivated per EPA SDWIS facility records; not previously noted in the earlier draft.
- 2016-2023EPA SDWIS shows a string of violations: Surface Water Treatment Rule monitoring violations in 2016 and 2020 (both resolved, tied to the now-inactive reservoir intake), plus 'Other'/monitoring…
- 2020Census population 724 (per Wikipedia). Note: the earlier draft's '830 in 2010' figure could not be independently reconfirmed this pass -- 830 matches the water system's current EPA-reported…
Source: en.wikipedia.orgdata.epa.gov
Treatment & pressure
How it is treated
SDWIS facility records show two source facilities: an active purchased interconnect from Gallia County Rural Water Association (arrives pre-treated; GCRWA's own supply comes from roughly 10 wells in the Ohio River Valley Aquifer near Gallipolis/Addison Twp., per the input), and a former…
Source: data.epa.govdata.epa.gov
Water pressure
Not published; no CCR or pressure-zone data found in this pass.
What it costs
Current rate schedule not found for Rio Grande; Gallia County Rural Water Association's own published wholesale/retail rates were also not locatable in this pass (its site could…
Water quality & impurities3
| Contaminant | Level | Limit | Year |
|---|---|---|---|
| Surface Water Treatment Rule monitoring… Resolved (return-to-compliance 2017-01-10 and 2020-07-15 respectively); tied to the water system's now-inactive Indian… | N/A violation | N/A | 2016… |
| Public Notification/'Other' violations Opened Nov. 14, 2018 and Oct. 3, 2023; both remain open in EPA SDWIS with no return-to-compliance date recorded as of… | N/A violation | N/A | 2018… |
| Monitoring/Reporting violation Opened Jan. 1, 2023; resolved Jan. 1, 2024 per SDWIS return-to-compliance date. | N/A violation | N/A | 2023 |
Source: data.epa.gov
EPA compliance record
Lead at the tap: 90th-percentile result 3.3 ppb in 2025 (action level 15 ppb).
EPA record: no health-based violations since 2015.
6 violations of any kind logged since 2020, 6 of them paperwork (monitoring, reporting, public notice or consumer report).
EPA compliance record · Gallia Co. Rural Water Association (treats the water)
Lead at the tap: 90th-percentile result 1.8 ppb in 2025 (action level 15 ppb).
EPA record: no health-based violations since 2015.
1 violation of any kind logged since 2020, 1 of them paperwork (monitoring, reporting, public notice or consumer report).
Supply stress
System currently relies on a single active source -- the Gallia County Rural Water Association interconnect -- for its water; the village's own Indian Creek Reservoir intake, which could otherwise serve as backup, has been inactive since 2004 per SDWIS. Multiple 'Other'/monitoring violations appear in EPA SDWIS from 2016-2023; two…
Source: data.epa.govdata.epa.gov
Sewers
Sanitary
Provider and treatment plant not found in sources reviewed.
Storm
Not found in sources reviewed.
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
- 45674 · Rio Grande98% of residents
Also present in 1 more ZIP code
- 45614 · Springfield Township and Bidwell1% 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
Rio Grande buys its water from Gallia Co. Rural Water Association.
No other system is on record buying water from Rio Grande.
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: en.wikipedia.org, data.epa.gov
History: en.wikipedia.org, data.epa.gov
Water quality: data.epa.gov
Treatment: data.epa.gov, data.epa.gov
Supply stress: data.epa.gov, data.epa.gov