Public water system · CO0334560
ActiveMiddle Mountain Cg
At a glance
Middle Mountain Cg (PWSID CO0334560) is an active transient non-community water system in La Plata County, Colorado. It reports serving 28 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by the federal government. EPA's records list one violation for this system; it is not health-based, and the most recent began in January 1994.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
28
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Middle Mountain Cg compare with other water systems in La Plata County?
By EPA's size categories, Middle Mountain Cg is a very small system (500 people or fewer). La Plata County has 108 active public water systems. Its population served is well below the county average of 577 people per system, and accounts for less than 0.1% of the 62,281 people reported by systems filed under the county. Across Colorado, the 2,207 active systems average 3,400 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Middle Mountain Cg is well below that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Colorado has 956 active transient non-community water systems, 43% of the state's 2,207 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,437 Colorado systems (65%) list groundwater as their primary source.
Who owns and regulates Middle Mountain Cg?
EPA lists Middle Mountain Cg as owned by the federal government. The CO state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 8 of the 108 active systems in La Plata County (7.4%) are also owned by the federal government.
Does Middle Mountain Cg have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in January 1994. By type: 1 monitoring and reporting. The contaminant or rule involved is Nitrate. EPA lists 1 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 |
|---|---|---|---|---|
| 1994-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
The one violation in EPA's records.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.
Middle Mountain Cg: frequently asked questions
Who runs Middle Mountain Cg?
Middle Mountain Cg (PWSID CO0334560) is a transient non-community water system owned by the federal government. It is regulated by the CO state drinking water program.
How many people does Middle Mountain Cg serve?
Middle Mountain Cg reports serving 28 people through 1 service connection in La Plata County, Colorado.
Where does Middle Mountain Cg 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 Middle Mountain Cg have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in January 1994. 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 Middle Mountain Cg'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 one violation for this system; it is not health-based, and the most recent began in January 1994. For current results, consult EPA ECHO, or the CO state drinking water program.
Where can I find Middle Mountain Cg's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Middle Mountain Cg is a 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 La Plata County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Durango City of | La Plata | 33,787 | Community | Surface water |
| Animas Wc | La Plata | 3,096 | Community | Groundwater |
| Bayfield Town of | La Plata | 2,300 | Community | Surface water |
| Forest Lakes Md | La Plata | 1,699 | Community | Groundwater |
| Lake Durango Wa | La Plata | 1,577 | Community | Surface water |
| Purgatory Md | La Plata | 1,364 | Community | Groundwater |
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, “Middle Mountain Cg, PWSID CO0334560, Colorado”, https://aquacensus.com/water-systems/colorado/middle-mountain-cg-co0334560 (data as of October 1, 2026).