Public water system · CO0103721
ActiveSouthgate Wsd
At a glance
Southgate Wsd (PWSID CO0103721) is an active community water system in Arapahoe County, Colorado. It reports serving 55,000 people through 11,511 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
55,000
Service connections
11,511
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Southgate Wsd compare with other water systems in Arapahoe County?
By EPA's size categories, Southgate Wsd is a large system (10,001 to 100,000 people). Arapahoe County has 39 active public water systems, and Southgate Wsd is the 4th-largest of them by population served. Its population served is about 148% above the county average of 22,146 people per system, and accounts for 6.4% of the 863,682 people reported by systems filed under the county. Across Colorado, the 2,207 active systems average 3,400 people each. Nationally, the average active community water system reports serving 6,703 people, so Southgate Wsd is about 8.2 times 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. Colorado has 1,068 active community water systems, 48% 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 Southgate Wsd?
EPA lists Southgate Wsd 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. 17 of the 39 active systems in Arapahoe County (44%) are also owned by a local government.
Does Southgate Wsd 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 Southgate Wsd. For the latest compliance status, check EPA ECHO for current compliance history.
Southgate Wsd: frequently asked questions
Who runs Southgate Wsd?
Southgate Wsd (PWSID CO0103721) is a community water system owned by a local government. It is regulated by the CO state drinking water program.
How many people does Southgate Wsd serve?
Southgate Wsd reports serving 55,000 people through 11,511 service connections in Arapahoe County, Colorado.
Where does Southgate Wsd 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 Southgate Wsd have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Southgate Wsd'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 the system's annual water quality report, EPA ECHO, or the CO state drinking water program.
Where can I find Southgate Wsd's water quality report?
As a community water system, Southgate Wsd 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 Arapahoe County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Aurora City of | Arapahoe | 533,407 | Community | Surface water |
| East Cherry Creek Valley Wsd | Arapahoe | 66,130 | Community | Purchased surface water |
| Englewood City of | Arapahoe | 57,332 | Community | Surface water |
| Southwest Metropolitan Wsd | Arapahoe | 48,648 | Community | Purchased surface water |
| Arapahoe Cnty Wwwa | Arapahoe | 31,000 | Community | Groundwater |
| Platte Canyon Wsd | Arapahoe | 19,485 | 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, “Southgate Wsd, PWSID CO0103721, Colorado”, https://aquacensus.com/water-systems/colorado/southgate-wsd-co0103721 (data as of October 1, 2026).