Public water system · ID4080047
ActiveTerrace Lakes Water Company
At a glance
Terrace Lakes Water Company (PWSID ID4080047) is an active community water system in Boise County, Idaho. It reports serving 475 people through 420 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, 4 are health-based, and the most recent began in April 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
475
Service connections
420
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Terrace Lakes Water Company compare with other water systems in Boise County?
By EPA's size categories, Terrace Lakes Water Company is a very small system (500 people or fewer). Boise County has 55 active public water systems, and Terrace Lakes Water Company is the 6th-largest of them by population served. Its population served is about 3.5 times the county average of 135 people per system, and accounts for 6.4% 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 Terrace Lakes Water Company 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. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,861 Idaho systems (95%) list groundwater as their primary source.
Who owns and regulates Terrace Lakes Water Company?
EPA lists Terrace Lakes Water Company 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 Terrace Lakes Water Company have drinking water violations?
Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in April 2025. The violations listed here began between January 2023 and April 2025. By type: 8 monitoring and reporting and 4 contaminant level above the legal limit. The contaminant or rule involved most often is Di(2-ethylhexyl) phthalate (4 of them). EPA lists 7 as archived and 5 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Di(2-ethylhexyl) phthalatecode 2039 | Yes | Resolved |
| 2025-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Di(2-ethylhexyl) phthalatecode 2039 | Yes | Resolved |
| 2024-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Di(2-ethylhexyl) phthalatecode 2039 | Yes | Resolved |
| 2024-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Di(2-ethylhexyl) phthalatecode 2039 | Yes | Resolved |
| 2023-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Heptachlor epoxidecode 2067 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Lindane (gamma-BHC)code 2010 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloropropanecode 2983 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1-Dichloroethylenecode 2977 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | No | Archived |
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.
Terrace Lakes Water Company: frequently asked questions
Who runs Terrace Lakes Water Company?
Terrace Lakes Water Company (PWSID ID4080047) is a community water system privately owned. It is regulated by the ID state drinking water program.
How many people does Terrace Lakes Water Company serve?
Terrace Lakes Water Company reports serving 475 people through 420 service connections in Boise County, Idaho.
Where does Terrace Lakes Water Company 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 Terrace Lakes Water Company have any drinking water violations?
Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in April 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 Terrace Lakes Water Company'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, 4 are health-based, and the most recent began in April 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 Terrace Lakes Water Company's water quality report?
As a community water system, Terrace Lakes Water Company 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 |
| Horseshoe Bend Water Supply | Boise | 750 | Community | Surface water |
| Idaho City Water Dept | Boise | 531 | Community | Surface water |
| Wilderness Ranch Owners Association Inc. | Boise | 525 | Community | Surface water |
| 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, “Terrace Lakes Water Company, PWSID ID4080047, Idaho”, https://aquacensus.com/water-systems/idaho/terrace-lakes-water-company-id4080047 (data as of October 1, 2026).