Buttermilk Metropolitan District☆

Where the water comes from

These are EPA's facility records, not DWR structures. Which decreed rights sit behind an intake is the next phase; nothing here is inferred.

Wholesale connections

Buys water from ASPEN CITY OF.

DWR structures that name this system

Source Probable join · fetched 2026-09-09 · matched on DWR's recorded contact or an EPA intake name; verify on the dossier

No DWR structure on file records this system as its contact, and none of its EPA intakes matches a structure name in its districts. DWR records a contact on only a fraction of structures, and only for districts fetched from its live service, so this is absence of a record, not evidence of no rights.

Compliance record

Source Register of another agency · fetched 2026-09-09 · verify at EPA ECHO ↗

EPA's own summary: violations in 12 of the last 12 quarters, significant non-compliance in 3. In violation for, in EPA's words: 0200=Surface Water Treatment Rule; 0999=Chlorine; 2456=Total Haloacetic Acids (HAA5); 2950=TTHM; 5000=Lead and Copper Rule; 7000=Consumer Confidence Rule; 7500=Public Notice. Currently: 5000=Lead and Copper Rule; 7000=Consumer Confidence Rule; 7500=Public Notice.

What happened

All 10 violation records on file, grouped into the 3 distinct things EPA's codes describe. Dates are the compliance period the violation is filed against.

What the regulator did about it

66 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.

20 most recent of 66; the rest are on the ECHO report.

Lead and copper

The latest 90th-percentile lead result is 0.0003 mg/L (sampling period ending 2025-12-31) against an action level of 0.015 mg/L, below it. 7 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 2026-09-09 · 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 Basalt, Colorado?

Buttermilk Metropolitan District is the public water system serving 200 people in Pitkin County, from purchased surface water. Its EPA public water system id is CO0149160.

Where does Buttermilk Metropolitan District get its water?

Buttermilk Metropolitan District reports purchased surface water as its primary source. EPA lists its source facilities as PURCHASED WATER FROM CITY OF ASPEN.

Does Buttermilk Metropolitan District have any drinking water violations?

EPA's compliance record shows no open health-based violations for Buttermilk Metropolitan District at the last monthly fetch. Older and non-health-based entries, if any, are listed on this page.