Public water system · AK2390285
ActiveDenali Borough Sd - Tri-Valley
At a glance
Denali Borough Sd - Tri-Valley (PWSID AK2390285) is an active non-transient non-community water system in Denali Borough County, Alaska. It reports serving 226 people through 4 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in January 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
226
Service connections
4
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Denali Borough Sd - Tri-Valley compare with other water systems in Denali Borough County?
By EPA's size categories, Denali Borough Sd - Tri-Valley is a very small system (500 people or fewer). Denali Borough County has 56 active public water systems. Its population served is about 31% below the county average of 326 people per system, and accounts for 1.2% of the 18,228 people reported by systems filed under the county. Across Alaska, the 1,322 active systems average 653 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Denali Borough Sd - Tri-Valley is about half of that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Alaska has 227 active non-transient non-community water systems, 17% of the state's 1,322 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,054 Alaska systems (80%) list groundwater as their primary source.
Who owns and regulates Denali Borough Sd - Tri-Valley?
EPA lists Denali Borough Sd - Tri-Valley as owned by a local government. The AK state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 2 of the 56 active systems in Denali Borough County (3.6%) are also owned by a local government.
Does Denali Borough Sd - Tri-Valley have drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in January 2026. The violations listed here began between January 1997 and January 2026. By type: 4 monitoring, 4 monitoring and reporting, 2 public notice, recordkeeping or other and 2 required treatment not met. The contaminant or rule involved most often is Revised Total Coliform Rule (4 of them). EPA lists 11 as resolved and 1 as archived. 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. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2026-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2024-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-05-08 | Public notice, recordkeeping or otherFailure to Consult with State · code 20 | Groundwater Rulecode 0700 | No | Resolved |
| 2022-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2012-10-16 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2012-08-17 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2002-01-01 | Public notice, recordkeeping or otherSanitary Survey (TCR) · code 28 | Not reported | No | Resolved |
| 1999-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1998-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1997-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dichloromethanecode 2964 | No | Resolved |
| 1997-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,2-Trichloroethanecode 2985 | 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.
Denali Borough Sd - Tri-Valley: frequently asked questions
Who runs Denali Borough Sd - Tri-Valley?
Denali Borough Sd - Tri-Valley (PWSID AK2390285) is a non-transient non-community water system owned by a local government. It is regulated by the AK state drinking water program.
How many people does Denali Borough Sd - Tri-Valley serve?
Denali Borough Sd - Tri-Valley reports serving 226 people through 4 service connections in Denali Borough County, Alaska.
Where does Denali Borough Sd - Tri-Valley 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 Denali Borough Sd - Tri-Valley have any drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in January 2026. 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 Denali Borough Sd - Tri-Valley'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, 2 are health-based, and the most recent began in January 2026. For current results, consult EPA ECHO, or the AK state drinking water program.
Where can I find Denali Borough Sd - Tri-Valley's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Denali Borough Sd - Tri-Valley is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Denali Borough County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Denali - Main / Front Country | Denali Borough | 4,122 | Non-transient non-community | Surface water |
| Princess Homestead Lodge | Denali Borough | 1,810 | Transient non-community | Groundwater |
| Holland Princess Denali Wilderness Ldg | Denali Borough | 1,392 | Transient non-community | Groundwater |
| Holland America Denali Lodge | Denali Borough | 1,372 | Transient non-community | Groundwater |
| Grande Denali / Denali Bluffs | Denali Borough | 1,000 | Transient non-community | Surface water |
| Northern Lights Well | Denali Borough | 725 | Transient non-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, “Denali Borough Sd - Tri-Valley, PWSID AK2390285, Alaska”, https://aquacensus.com/water-systems/alaska/denali-borough-sd-tri-valley-ak2390285 (data as of October 1, 2026).