Hydrohistorian
Stage Run Homeowners Association
Its service area also reaches South Platte: Denver Gage to Greeley (29.0%).
Modelled boundary. EPA estimated this service area (Random Forest) rather than tracing a utility-supplied map; treat the edge as approximate. About 1 km².
Where the water comes from
| Facility | Kind | Water |
|---|---|---|
| STAGE RUN WELL A1 | Well | Groundwater |
| STAGE RUN WELL A2 | Well | Groundwater |
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 2026-09-09 · 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 ↗
1 violation open now, none health-based. These are monitoring, reporting or notice requirements — a sample not taken, or a result not filed on time. They are real obligations, but they are not a finding about the water itself.
EPA's own summary: violations in 9 of the last 12 quarters. In violation for, in EPA's words: 2456=Total Haloacetic Acids (HAA5); 2950=TTHM; 8000=Revised Total Coliform Rule. Currently: 8000=Revised Total Coliform Rule.
What happened
All 1 violation record on file, grouped into the 1 distinct thing EPA's codes describe. Dates are the compliance period the violation is filed against.
EPA violation code 5A, contaminant 8000 — not in the code table this build carries.
Every violation record, as filed (1 of 1)
| Compliance period | What | About | Kind | Status | Measured |
|---|---|---|---|---|---|
| 2026-04-23 | code 5A | Revised Total Coliform Rule | other | open |
What the regulator did about it
30 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 |
|---|---|---|
| 2026-04-23 | St Violation/Reminder Notice | state |
| 2026-04-23 | St Public Notif requested | state |
| 2025-04-06 | St Compliance achieved Copy of lead consumer notice provided to LCR006 for 12/4/2024 sample result and COD submitted via portal 4/6/2025 -STF 4/7/2025 |
state |
| 2025-04-01 | St Violation/Reminder Notice | state |
| 2025-04-01 | St Public Notif requested | state |
| 2024-12-04 | St Compliance achieved Copy of lead consumer notice provided LCR007 and COD certifying all notices distributed 12/4/2024 received same day via portal for lead and copper sample collected 12/22/2023 -STF 12/4/2024 |
state |
| 2024-07-01 | St Public Notif received PN performed via CCR. LP 7/2/24 |
state |
| 2024-07-01 | St Compliance achieved | state |
| 2024-07-01 | St Public Notif received | state |
| 2024-04-15 | St Violation/Reminder Notice | state |
| 2024-04-15 | St Public Notif requested | state |
| 2023-10-17 | St Violation/Reminder Notice | state |
| 2023-10-17 | St Public Notif requested | state |
| 2023-09-28 | St Compliance achieved RTC with late reporting of samples. Sample collected 9/28/2023, reported 10/16/2023. Sampled on time for DBP Q3 restriction -STF 1/23/2024 |
state |
| 2021-11-09 | St Compliance achieved System sampled this analyte on 8/23/21; eligible |
state |
| 2021-08-05 | St Violation/Reminder Notice | state |
| 2021-08-05 | St Public Notif requested | state |
| 2021-08-02 | St Violation/Reminder Notice | state |
| 2021-08-02 | St Public Notif requested | state |
| 2021-07-08 | St Compliance achieved System distributed its 2020 CCR; however, it was distributed late (7/8/21, due 6/30/21); since it was distributed, SOXing this violation; jlm 8/2/21. |
state |
20 most recent of 30; the rest are on the ECHO report.
Lead and copper
The latest 90th-percentile lead result is 0.003 mg/L (sampling period ending 2025-12-31) against an action level of 0.015 mg/L, below it. 13 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 Aurora, Colorado?
Stage Run Homeowners Association is the public water system serving 150 people in Arapahoe County, from groundwater. Its EPA public water system id is CO0103079.
Where does Stage Run Homeowners Association get its water?
Stage Run Homeowners Association reports groundwater as its primary source. EPA lists its source facilities as STAGE RUN WELL A1, STAGE RUN WELL A2.
Does Stage Run Homeowners Association have any drinking water violations?
EPA's compliance record shows no open health-based violations for Stage Run Homeowners Association at the last monthly fetch. Older and non-health-based entries, if any, are listed on this page.
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 →