Hydrohistorian
Mount Crested Butte Water & Sanitation District
Serves Mount Crested Butte.
Modelled boundary. EPA estimated this service area (Random Forest) rather than tracing a utility-supplied map; treat the edge as approximate. About 3 km².
Where the water comes from
| Facility | Kind | Water |
|---|---|---|
| UPPER KEYSTONE NO 2 SPRING | Spring | Groundwater under the influence of surface water |
| MALENSIK DITCH 5 | Intake | Surface water |
| PAINTER BOY SPRINGS | Intake | Surface water |
| LOWER KEYSTONE FLATS SPRING 1 AND 2 | Intake | Surface water |
| UPPER KEYSTONE NO 1 SPRING | Intake | Surface water |
| EAST RIVER DIVERSION | Intake | Surface water |
These are EPA's facility records, not DWR structures. Which decreed rights sit behind an intake is the next phase; nothing here is inferred.
DWR structures that name this system
Source Probable join · fetched 2026-10-06 · matched on DWR's recorded contact or an EPA intake name; verify on the dossier
6 structures on DWR's record 6 match an EPA intake by name. A match says who DWR lists, not who owns the water: a ditch company can own the headgate while the system owns shares, and a consultant can be the contact. The dossier holds the decree.
| Structure | Type | Source | District | Matched on |
|---|---|---|---|---|
| EAST RIVER 5901610 | MF | EAST RIVER | East River Basin | intake name: EAST RIVER DIVERSION |
| EAST RIVER 5901403 | MF | EAST RIVER | East River Basin | intake name: EAST RIVER DIVERSION |
| EAST RIVER 5901412 | MF | EAST RIVER | East River Basin | intake name: EAST RIVER DIVERSION |
| EAST RIVER 5901516 | MF | EAST RIVER | East River Basin | intake name: EAST RIVER DIVERSION |
| EAST RIVER NO 1 DITCH 5900549 | 1 | EAST RIVER | East River Basin | intake name: EAST RIVER DIVERSION |
| EAST RIVER NO 2 DITCH 5900550 | 1 | EAST RIVER | East River Basin | intake name: EAST RIVER DIVERSION |
Compliance record
Source Register of another agency · fetched 2026-10-07 · verify at EPA ECHO ↗
No open violation and no health-based violation on EPA's federal record for this system at the last monthly fetch. That is a record of reported compliance, not a test result: SDWIS carries violations, not routine sample values.
EPA's own summary: violations in 1 of the last 12 quarters. In violation for, in EPA's words: 3014=E. COLI.
No health-based or open violation on the federal record for this system.
What the regulator did about it
11 enforcement actions on this system's federal record. In Colorado the state is the primacy agency, so most actions are the state's; EPA acts directly on tribal systems and when it steps in.
| Date | Action | By |
|---|---|---|
| 2024-05-01 | St Public Notif received PN performed with 2024 CCR. MM 5/24/2024 |
state |
| 2024-01-11 | St Violation/Reminder Notice | state |
| 2024-01-11 | St Public Notif requested | state |
| 2024-01-11 | St Compliance achieved SOXing; sample reported on 12/14/2023. MM 5/8/2024 |
state |
| 2017-04-28 | St Public Notif received | state |
| 2016-07-22 | St Compliance achieved | state |
| 2016-06-06 | St Compliance achieved RTC with next quarter's samples. ejc 6/6/16 |
state |
| 2016-05-12 | St Violation/Reminder Notice | state |
| 2016-05-12 | St Public Notif requested | state |
| 2016-02-29 | St Violation/Reminder Notice | state |
| 2016-02-29 | St Public Notif requested | state |
Lead and copper
The latest 90th-percentile lead result is 0.001 mg/L (sampling period ending 2028-12-31) against an action level of 0.015 mg/L, below it. 16 results on file.
The action level is not a health limit: it is the level at which the rule requires a system to act (corrosion control, public education, and in some cases replacing lead service lines). Lead mostly enters water from household plumbing, so a system-wide percentile does not tell you what comes out of one tap.
Violation, enforcement and lead/copper records are EPA SDWIS federal reporting, fetched monthly; the summary is EPA ECHO. Code names come from EPA's own REF_CODE_VALUE table. SDWIS carries violations, not routine sample results — nitrate, disinfection by-product and PFAS values are not in it, and a clean record here means nothing was reported as a violation, not that nothing was ever detected. For what was measured, ask the system for its Consumer Confidence Report.
PFAS and lithium: EPA's UCMR 5 monitoring, 2023–2025
Source Register of another agency · fetched 2026-10-09 · verify at EPA UCMR occurrence data ↗
EPA did not sample this system under UCMR 5 (the rule covered every system serving more than 3,300 people and a drawn sample of smaller ones).
Common questions
Who provides drinking water in Mt Crested Butte, Colorado?
Mount Crested Butte Water & Sanitation District is the public water system serving 3,296 people in Gunnison County, from surface water. Its EPA public water system id is CO0126190.
Where does Mount Crested Butte Water & Sanitation District get its water?
Mount Crested Butte Water & Sanitation District reports surface water as its primary source. EPA lists its source facilities as UPPER KEYSTONE NO 2 SPRING, MALENSIK DITCH 5, PAINTER BOY SPRINGS, LOWER KEYSTONE FLATS SPRING 1 AND 2.
Does Mount Crested Butte Water & Sanitation District have any drinking water violations?
EPA's compliance record shows no open health-based violations for Mount Crested Butte Water & Sanitation District at the last monthly fetch. Older and non-health-based entries, if any, are listed on this page.
Places this system serves
Census places its EPA service-area boundary substantially covers. Each page lists every system serving that place.
Every provider in Gunnison County.
The record
EPA SDWIS federal reporting as of 2026-10-06; the compliance record above is EPA's own, fetched monthly, and the ECHO report carries the rest. Report a problem →