Public water system · ID4080024
ActiveHorseshoe Bend Water Supply
At a glance
Horseshoe Bend Water Supply (PWSID ID4080024) is an active community water system in Boise County, Idaho. It reports serving 750 people through 411 service connections. Its primary water source is surface water, 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 December 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
750
Service connections
411
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Horseshoe Bend Water Supply compare with other water systems in Boise County?
By EPA's size categories, Horseshoe Bend Water Supply is a small system (501 to 3,300 people). Boise County has 55 active public water systems, and Horseshoe Bend Water Supply is the 2nd-largest of them by population served. Its population served is about 5.5 times the county average of 135 people per system, and accounts for 10% of the 7,448 people reported by systems filed under the county. Across Idaho, the 1,961 active systems average 899 people each. Nationally, the average active community water system reports serving 6,703 people, so Horseshoe Bend Water Supply 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. Idaho has 765 active community water systems, 39% of the state's 1,961 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 66 Idaho systems (3.4%) list surface water as their primary source.
Who owns and regulates Horseshoe Bend Water Supply?
EPA lists Horseshoe Bend Water Supply as privately owned. The ID state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 49 of the 55 active systems in Boise County (89%) are also privately owned.
Does Horseshoe Bend Water Supply have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in December 2025. The violations listed here began between January 2023 and December 2025. By type: 11 monitoring and reporting and 1 reporting. The contaminant or rule involved most often is Bromate (5 of them). EPA lists 9 as archived, 2 as resolved and 1 as unaddressed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-12-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Archived |
| 2025-12-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Archived |
| 2025-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Bromatecode 1011 | No | Archived |
| 2025-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Archived |
| 2025-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Archived |
| 2025-07-02 | ReportingNotification, Known or Potential LSL · code 4H | Lead and Copper Rule Revisionscode 5200 | No | Unaddressed |
| 2025-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Bromatecode 1011 | No | Archived |
| 2025-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Bromatecode 1011 | No | Archived |
| 2024-11-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Archived |
| 2024-11-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Archived |
| 2024-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Bromatecode 1011 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Bromatecode 1011 | 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.
Horseshoe Bend Water Supply: frequently asked questions
Who runs Horseshoe Bend Water Supply?
Horseshoe Bend Water Supply (PWSID ID4080024) is a community water system privately owned. It is regulated by the ID state drinking water program.
How many people does Horseshoe Bend Water Supply serve?
Horseshoe Bend Water Supply reports serving 750 people through 411 service connections in Boise County, Idaho.
Where does Horseshoe Bend Water Supply get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Horseshoe Bend Water Supply 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 December 2025. 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 Horseshoe Bend Water Supply'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 December 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the ID state drinking water program.
Where can I find Horseshoe Bend Water Supply's water quality report?
As a community water system, Horseshoe Bend Water Supply 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 Boise County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Idpr Lucky Peak Sp Spring Shores | Boise | 780 | Transient non-community | Groundwater |
| Bogus Basin Mtn Resort | Boise | 750 | Non-transient non-community | Surface water |
| Idaho City Water Dept | Boise | 531 | Community | Surface water |
| Wilderness Ranch Owners Association Inc. | Boise | 525 | Community | Surface water |
| Terrace Lakes Water Company | Boise | 475 | Community | Groundwater |
| Scriver Woods Homeowners Assn | Boise | 310 | Community | Groundwater |
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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, “Horseshoe Bend Water Supply, PWSID ID4080024, Idaho”, https://aquacensus.com/water-systems/idaho/horseshoe-bend-water-supply-id4080024 (data as of October 1, 2026).