Public water system · CO0102200
ActiveEast Alamosa
At a glance
East Alamosa (PWSID CO0102200) is an active community water system in Alamosa County, Colorado. It reports serving 1,453 people through 403 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in October 2008.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,453
Service connections
403
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does East Alamosa compare with other water systems in Alamosa County?
By EPA's size categories, East Alamosa is a small system (501 to 3,300 people). Alamosa County has 17 active public water systems, and East Alamosa is the 2nd-largest of them by population served. Its population served is about 51% above the county average of 962 people per system, and accounts for 8.9% of the 16,356 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 East Alamosa 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. Colorado has 1,068 active community water systems, 48% of the state's 2,207 active systems. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 34 Colorado systems (1.5%) list purchased groundwater as their primary source.
Who owns and regulates East Alamosa?
EPA lists East Alamosa 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. 4 of the 17 active systems in Alamosa County (24%) are also owned by a local government.
Does East Alamosa have drinking water violations?
Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in October 2008. The violations listed here began between July 2007 and October 2008. By type: 6 monitoring and reporting, 5 contaminant level above the legal limit and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Arsenic (5 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 |
|---|---|---|---|---|
| 2008-10-10 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2008-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2008-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2008-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Routine (IDSE) · code 30 | Stage 2 Disinfectants and Disinfection Byproducts Rulecode 0600 | No | Resolved |
| 2008-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2007-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2007-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2007-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | 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.
East Alamosa: frequently asked questions
Who runs East Alamosa?
East Alamosa (PWSID CO0102200) is a community water system owned by a local government. It is regulated by the CO state drinking water program.
How many people does East Alamosa serve?
East Alamosa reports serving 1,453 people through 403 service connections in Alamosa County, Colorado.
Where does East Alamosa get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does East Alamosa have any drinking water violations?
Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in October 2008. 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 East Alamosa'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, 5 are health-based, and the most recent began in October 2008. For current results, consult the system's annual water quality report, EPA ECHO, or the CO state drinking water program.
Where can I find East Alamosa's water quality report?
As a community water system, East Alamosa 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 Alamosa County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Alamosa City of | Alamosa | 11,271 | Community | Groundwater |
| Great Sand Dunes Hq | Alamosa | 1,400 | Non-transient non-community | Groundwater |
| Ramble Cg | Alamosa | 601 | Transient non-community | Groundwater |
| Sangre De Cristo Lane Seven School | Alamosa | 445 | Non-transient non-community | Groundwater |
| Great Sand Dunes Pinon Flats Cg | Alamosa | 250 | Transient non-community | Groundwater |
| Wagon Wheel MHP | Alamosa | 160 | 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, “East Alamosa, PWSID CO0102200, Colorado”, https://aquacensus.com/water-systems/colorado/east-alamosa-co0102200 (data as of October 1, 2026).