Public water system · 064020001
ActiveIowa Tribal Complex
At a glance
Iowa Tribal Complex (PWSID 064020001) is an active non-transient non-community water system in Oklahoma. It reports serving 263 people through 29 service connections. Its primary water source is groundwater, and EPA lists it as Native American-owned. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in August 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
263
Service connections
29
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Iowa Tribal Complex compare with other water systems in Oklahoma?
By EPA's size categories, Iowa Tribal Complex is a very small system (500 people or fewer). Across Oklahoma, the 1,254 active systems average 2,907 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Iowa Tribal Complex is about 39% below 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. Oklahoma has 84 active non-transient non-community water systems, 6.7% of the state's 1,254 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 701 Oklahoma systems (56%) list groundwater as their primary source.
Who owns and regulates Iowa Tribal Complex?
EPA lists Iowa Tribal Complex as Native American-owned. The EPA Region 06 is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act.
Does Iowa Tribal Complex have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in August 2015. The violations listed here began between July 2005 and August 2015. By type: 11 monitoring and reporting and 1 required treatment not met. The contaminant or rule involved most often is Total coliform bacteria (TCR) (9 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 |
|---|---|---|---|---|
| 2015-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2013-07-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2013-06-18 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2012-02-13 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2010-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2009-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2009-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2009-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2007-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2007-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | 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.
Iowa Tribal Complex: frequently asked questions
Who runs Iowa Tribal Complex?
Iowa Tribal Complex (PWSID 064020001) is a non-transient non-community water system Native American-owned. It is regulated by the EPA Region 06.
How many people does Iowa Tribal Complex serve?
Iowa Tribal Complex reports serving 263 people through 29 service connections in Oklahoma.
Where does Iowa Tribal Complex 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 Iowa Tribal Complex have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in August 2015. 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 Iowa Tribal Complex'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, one is health-based, and the most recent began in August 2015. For current results, consult EPA ECHO, or the EPA Region 06.
Where can I find Iowa Tribal Complex's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Iowa Tribal Complex 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 Oklahoma
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Oklahoma City | Oklahoma | 644,000 | Community | Surface water |
| Tulsa | Tulsa | 413,000 | Community | Surface water |
| Broken Arrow Municipal Authority | Tulsa | 116,330 | Community | Surface water |
| Norman Utilities Authority | Cleveland | 104,868 | Community | Surface water |
| Lawton | Comanche | 92,757 | Community | Surface water |
| Edmond Pwa | Oklahoma | 79,408 | Community | Surface water |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Iowa Tribal Complex, PWSID 064020001, Oklahoma”, https://aquacensus.com/water-systems/oklahoma/iowa-tribal-complex-064020001 (data as of October 1, 2026).