Public water system · VA1121755
ActiveTwin Boulders Subdivision
At a glance
Twin Boulders Subdivision (PWSID VA1121755) is an active community water system in Montgomery County, Virginia. It reports serving 90 people through 29 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
90
Service connections
29
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Twin Boulders Subdivision compare with other water systems in Montgomery County?
By EPA's size categories, Twin Boulders Subdivision is a very small system (500 people or fewer). Montgomery County has 27 active public water systems. Its population served is well below the county average of 2,717 people per system, and accounts for 0.1% of the 73,361 people reported by systems filed under the county. Across Virginia, the 2,420 active systems average 3,122 people each. Nationally, the average active community water system reports serving 6,703 people, so Twin Boulders Subdivision is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Virginia has 844 active community water systems, 35% of the state's 2,420 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,089 Virginia systems (86%) list groundwater as their primary source.
Who owns and regulates Twin Boulders Subdivision?
EPA lists Twin Boulders Subdivision as privately owned. The VA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 15 of the 27 active systems in Montgomery County (56%) are also privately owned.
Does Twin Boulders Subdivision have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2024. The violations listed here began between September 2021 and October 2024. By type: 8 public notice, recordkeeping or other, 3 monitoring and 1 monitoring and reporting. The contaminant or rule involved most often is Public Notice (6 of them). EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-10-02 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2022-01-10 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2022-01-10 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2021-12-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-11-27 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2021-11-27 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2021-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-10-24 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2021-10-02 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2021-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2021-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-09-23 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Twin Boulders Subdivision: frequently asked questions
Who runs Twin Boulders Subdivision?
Twin Boulders Subdivision (PWSID VA1121755) is a community water system privately owned. It is regulated by the VA state drinking water program.
How many people does Twin Boulders Subdivision serve?
Twin Boulders Subdivision reports serving 90 people through 29 service connections in Montgomery County, Virginia.
Where does Twin Boulders Subdivision get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Twin Boulders Subdivision have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2024. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Twin Boulders Subdivision's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the VA state drinking water program.
Where can I find Twin Boulders Subdivision's water quality report?
As a community water system, Twin Boulders Subdivision must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Montgomery County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Blacksburg, Town of | Montgomery | 34,578 | Community | Purchased surface water |
| Christiansburg Town of | Montgomery | 22,000 | Community | Purchased surface water |
| Prices Fork/Merrimac | Montgomery | 4,541 | Community | Purchased surface water |
| Christiansburg Elliston Waterline | Montgomery | 3,626 | Community | Purchased surface water |
| Plum Creek | Montgomery | 1,740 | Community | Purchased surface water |
| Radford Army Ammunition Plant | Montgomery | 1,602 | Community | Surface water |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Twin Boulders Subdivision, PWSID VA1121755, Virginia”, https://aquacensus.com/water-systems/virginia/twin-boulders-subdivision-va1121755 (data as of October 1, 2026).