Public water system · MT0000300
ActiveAvista Utilities Noxon Rapids Dam
At a glance
Avista Utilities Noxon Rapids Dam (PWSID MT0000300) is an active community water system in Sanders County, Montana. It reports serving 43 people through 13 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 8 violations for this system; none is health-based, and the most recent began in January 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
43
Service connections
13
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Avista Utilities Noxon Rapids Dam compare with other water systems in Sanders County?
By EPA's size categories, Avista Utilities Noxon Rapids Dam is a very small system (500 people or fewer). Sanders County has 44 active public water systems. Its population served is well below the county average of 209 people per system, and accounts for 0.5% of the 9,212 people reported by systems filed under the county. Across Montana, the 2,378 active systems average 489 people each. Nationally, the average active community water system reports serving 6,703 people, so Avista Utilities Noxon Rapids Dam 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. Montana has 853 active community water systems, 36% of the state's 2,378 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,994 Montana systems (84%) list groundwater as their primary source.
Who owns and regulates Avista Utilities Noxon Rapids Dam?
EPA lists Avista Utilities Noxon Rapids Dam as privately owned. The MT state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 35 of the 44 active systems in Sanders County (80%) are also privately owned.
Does Avista Utilities Noxon Rapids Dam have drinking water violations?
EPA's records list 8 violations for this system; none is health-based, and the most recent began in January 2020. The violations listed here began between January 1981 and January 2020. By type: 7 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Lead and Copper Rule (2 of them). EPA lists 7 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 |
|---|---|---|---|---|
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Asbestoscode 1094 | No | Resolved |
| 2010-01-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2005-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2004-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 1994-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1994-02-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1981-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
All 8 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.
Avista Utilities Noxon Rapids Dam: frequently asked questions
Who runs Avista Utilities Noxon Rapids Dam?
Avista Utilities Noxon Rapids Dam (PWSID MT0000300) is a community water system privately owned. It is regulated by the MT state drinking water program.
How many people does Avista Utilities Noxon Rapids Dam serve?
Avista Utilities Noxon Rapids Dam reports serving 43 people through 13 service connections in Sanders County, Montana.
Where does Avista Utilities Noxon Rapids Dam 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 Avista Utilities Noxon Rapids Dam have any drinking water violations?
EPA's records list 8 violations for this system; none is health-based, and the most recent began in January 2020. 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 Avista Utilities Noxon Rapids Dam'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. EPA's records list 8 violations for this system; none is health-based, and the most recent began in January 2020. For current results, consult the system's annual water quality report, EPA ECHO, or the MT state drinking water program.
Where can I find Avista Utilities Noxon Rapids Dam's water quality report?
As a community water system, Avista Utilities Noxon Rapids Dam 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 Sanders County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Thompson Falls City of | Sanders | 1,950 | Community | Groundwater |
| Plains Town of | Sanders | 1,700 | Community | Groundwater |
| Hot Springs Municipal Water | Sanders | 600 | Community | Groundwater |
| One Stop | Sanders | 500 | Transient non-community | Groundwater |
| Sanders County Harvest Foods | Sanders | 445 | Non-transient non-community | Groundwater |
| Water Service Inc. Trout Creek | Sanders | 350 | 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, “Avista Utilities Noxon Rapids Dam, PWSID MT0000300, Montana”, https://aquacensus.com/water-systems/montana/avista-utilities-noxon-rapids-dam-mt0000300 (data as of October 1, 2026).