BOULDER, CO · Boulder County
SHANNON WSD Water System
Consumer Confidence Report status
SHANNON WSD must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for SHANNON WSD.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Colorado’s official records. Always confirm current status with Colorado before making decisions based on this information.
System facts
- System ID (PWSID)
- CO0107710
- System type
- Community Water System
- Population served
- 450
- Service connections
- 160
- Ownership
- local government
- Water source
- groundwater (wells)
SHANNON WSD is one of 1,060 community water systems in Colorado in the 500 or fewer people size category, serving 450 people from groundwater.
As of August 1, 2026, its federal record holds 2 entries between 1991 and 1994, all of which EPA lists as closed. Nothing has been added since 1994.
Of the 2, 1 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Total Coliform Rules.
Violation history
Monitoring, Routine Major (TCR)
—Coliform (TCR)
May 1, 1994 – May 31, 1994
ResolvedMaximum Contaminant Level Violation, Monthly (TCR)
Health-basedColiform (TCR)
September 1, 1991 – September 30, 1991
Archived
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| May 1, 1994 – May 31, 1994 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| September 1, 1991 – September 30, 1991 | Maximum Contaminant Level Violation, Monthly (TCR) | Coliform (TCR) | Health-based | Archived |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- April 4, 2008State Compliance achieved23 linked violations
- May 1, 2002State Formal Notice of Violation issued5 linked violations
- May 1, 2002State Public Notification requested1 linked violation
Common questions
Is SHANNON WSD required to publish a Consumer Confidence Report?
- Yes. SHANNON WSD is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is SHANNON WSD’s next Consumer Confidence Report due?
- SHANNON WSD’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does SHANNON WSD have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for SHANNON WSD.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
SULKA, MIKE
303-907-8512
BOULDER, CO 80303