Public water system · CO0143184
ActiveCornerstone Md 1
At a glance
Cornerstone Md 1 (PWSID CO0143184) is an active transient non-community water system in Montrose County, Colorado. It reports serving 117 people through 43 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
117
Service connections
43
Primary source
SWP
Purchased surface water
System type
TNCWS
Transient non-community water system
System record
How does Cornerstone Md 1 compare with other water systems in Montrose County?
By EPA's size categories, Cornerstone Md 1 is a very small system (500 people or fewer). Montrose County has 25 active public water systems. Its population served is well below the county average of 2,250 people per system, and accounts for 0.2% of the 56,238 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 Cornerstone Md 1 is about 19% 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 337 Colorado systems (15%) list purchased surface water as their primary source.
Who owns and regulates Cornerstone Md 1?
EPA lists Cornerstone Md 1 as owned by a local 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. 9 of the 25 active systems in Montrose County (36%) are also owned by a local government.
Does Cornerstone Md 1 have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Cornerstone Md 1. For the latest compliance status, check EPA ECHO for current compliance history.
Cornerstone Md 1: frequently asked questions
Who runs Cornerstone Md 1?
Cornerstone Md 1 (PWSID CO0143184) is a transient non-community water system owned by a local government. It is regulated by the CO state drinking water program.
How many people does Cornerstone Md 1 serve?
Cornerstone Md 1 reports serving 117 people through 43 service connections in Montrose County, Colorado.
Where does Cornerstone Md 1 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 Cornerstone Md 1 have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Cornerstone Md 1'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 Safe Drinking Water Act records list no violations for this system. For current results, consult EPA ECHO, or the CO state drinking water program.
Where can I find Cornerstone Md 1's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Cornerstone Md 1 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 Montrose County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Tri County Wcd | Montrose | 20,490 | Community | Purchased surface water |
| Montrose City of | Montrose | 19,305 | Community | Purchased surface water |
| Menoken Wd | Montrose | 4,500 | Community | Purchased surface water |
| Chipeta Wd | Montrose | 3,802 | Community | Purchased surface water |
| Olathe Town of | Montrose | 3,015 | Community | Purchased surface water |
| Northbrook Villas Mhc | Montrose | 1,052 | Community | Purchased surface water |
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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, “Cornerstone Md 1, PWSID CO0143184, Colorado”, https://aquacensus.com/water-systems/colorado/cornerstone-md-1-co0143184 (data as of October 1, 2026).