Hydrohistorian
Willows Water District
Serves Centennial.
Boundary traced from IRE. About 9 km².
Where the water comes from
| Facility | Kind | Water |
|---|---|---|
| PURCHASE DENVER WATER CO0116001 | Consecutive connection (purchased) | Surface water · from DENVER WATER BOARD |
| UNIVERSITY 111 MASTER METER | Consecutive connection (purchased) | Surface water · from DENVER WATER BOARD |
| HOLLY 111 MASTER METER | Consecutive connection (purchased) | Surface water · from DENVER WATER BOARD |
| QUEBEC 111 MASTER METER | Consecutive connection (purchased) | Surface water · from DENVER WATER BOARD |
| POPLAR C55 MASTER METER | Consecutive connection (purchased) | Surface water · from DENVER WATER BOARD |
| A6A SOUTHEAST ENGLEWOOD MASTER METER | Consecutive connection (purchased) | Surface water · from DENVER WATER BOARD |
| LENSKI MASTER METER | Consecutive connection (purchased) | Surface water · from DENVER WATER BOARD |
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 DENVER WATER BOARD.
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 ↗
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 0 of the last 12 quarters.
No health-based or open violation on the federal record for this system.
No enforcement action against this system on the federal record.
No lead or copper 90th-percentile result on the federal record for this system.
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 Centennial, Colorado?
Willows Water District is the public water system serving 19,000 people in Arapahoe County, from purchased surface water. Its EPA public water system id is CO0103100.
Where does Willows Water District get its water?
Willows Water District reports purchased surface water as its primary source. EPA lists its source facilities as PURCHASE DENVER WATER CO0116001, UNIVERSITY 111 MASTER METER, HOLLY 111 MASTER METER, QUEBEC 111 MASTER METER.
Does Willows Water District have any drinking water violations?
EPA's compliance record shows no open health-based violations for Willows Water 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 Arapahoe County.
The record
EPA SDWIS federal reporting as of 2026-09-08; the compliance record above is EPA's own, fetched monthly, and the ECHO report carries the rest. Report a problem →