Public water system · NN4903071
ActiveTodahaidekani NTUA
At a glance
Todahaidekani NTUA (PWSID NN4903071) is an active community water system in Utah. It reports serving 301 people through 88 service connections. Its primary water source is purchased surface water, and EPA lists it as Native American-owned. Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in January 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
301
Service connections
88
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Todahaidekani NTUA compare with other water systems in Utah?
By EPA's size categories, Todahaidekani NTUA is a very small system (500 people or fewer). Across Utah, the 1,133 active systems average 3,458 people each. Nationally, the average active community water system reports serving 6,703 people, so Todahaidekani NTUA 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. Utah has 540 active community water systems, 48% of the state's 1,133 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 106 Utah systems (9.4%) list purchased surface water as their primary source.
Who owns and regulates Todahaidekani NTUA?
EPA lists Todahaidekani NTUA as Native American-owned. The NN state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act.
Does Todahaidekani NTUA have drinking water violations?
Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in January 2022. The violations listed here began between April 2016 and January 2022. By type: 6 contaminant level above the legal limit, 4 public notice, recordkeeping or other and 2 monitoring and reporting. The contaminant or rule involved most often is Arsenic (8 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 |
|---|---|---|---|---|
| 2022-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 2020-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2020-04-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2019-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 2018-10-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2018-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2018-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2017-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2017-01-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2016-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2016-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2016-04-01 | Public notice, recordkeeping or otherSample Siting Plan Errors (RTCR) · code 5A | Revised Total Coliform Rulecode 8000 | 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.
Todahaidekani NTUA: frequently asked questions
Who runs Todahaidekani NTUA?
Todahaidekani NTUA (PWSID NN4903071) is a community water system Native American-owned. It is regulated by the NN state drinking water program.
How many people does Todahaidekani NTUA serve?
Todahaidekani NTUA reports serving 301 people through 88 service connections in Utah.
Where does Todahaidekani NTUA get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Todahaidekani NTUA have any drinking water violations?
Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in January 2022. 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 Todahaidekani NTUA'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, 6 are health-based, and the most recent began in January 2022. For current results, consult the system's annual water quality report, EPA ECHO, or the NN state drinking water program.
Where can I find Todahaidekani NTUA's water quality report?
As a community water system, Todahaidekani NTUA 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 Utah
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Salt Lake City Water System | Salt Lake | 383,612 | Community | Surface water |
| Granger-Hunter Improvement District | Salt Lake | 121,083 | Community | Purchased surface water |
| West Jordan City Water System | Salt Lake | 117,025 | Community | Purchased surface water |
| Provo City | Utah | 116,288 | Community | Purchased surface water |
| St George City Water System | Washington | 105,240 | Community | Purchased surface water |
| Sandy City Water System | Salt Lake | 99,750 | Community | Purchased 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, “Todahaidekani NTUA, PWSID NN4903071, Utah”, https://aquacensus.com/water-systems/utah/todahaidekani-ntua-nn4903071 (data as of October 1, 2026).