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Eleven Mile Ranch Association

Eleven Mile Ranch Association is the public water system serving 72 people in Park County, from surface water. EPA has no service-area boundary on file for this system, so it cannot be drawn on a map.
Community system · EPA id CO0247017 · filed with EPA as “ELEVEN MILE RANCH ASSOCIATION”
People served
72
Service connections
72
Primary source
Surface water
Owner
Private
Counties served
Park
Water district
no boundary on file

Where the water comes from

FacilityKindWater
WELL NO 1WellGroundwater under the influence of surface water
WELL NO 3WellGroundwater under the influence of surface water
LAKE GEORGE INTAKEIntakeSurface 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

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 2026-10-07 · verify at EPA ECHO ↗

Nothing open today, but 4 health-based violations appear on the federal record historically. The history is below.

EPA's own summary: violations in 7 of the last 12 quarters. In violation for, in EPA's words: 0200=Surface Water Treatment Rule; 0300=Interim Enhanced Surface Water Treatment Rule; 3014=E. COLI.

What happened

All 4 violation records on file, grouped into the 2 distinct things EPA's codes describe. Dates are the compliance period the violation is filed against.

Treatment Technique (SWTR and GWR) — SWTR health-based
A required treatment step was not carried out or not proved. 2 records, 2023-07-01 to 2023-08-01.
Rule: Surface Water Treatment Rule -- filtration and disinfection.
MCL, Average — Nitrate health-based
A measured contaminant level went over the federal limit. 2 records, 2015-04-01 to 2015-07-01. Highest measured: 13.8 MG/L.
Rule: Nitrate and nitrite.
Every violation record, as filed (4 of 4)
Compliance periodWhatAboutKindStatusMeasured
2023-08-01 – 2023-08-31 Treatment Technique (SWTR and GWR) SWTR health-based returned to compliance (2023-09-05)
2023-07-01 – 2023-07-31 Treatment Technique (SWTR and GWR) SWTR health-based returned to compliance (2023-09-05)
2015-07-01 – 2015-09-30 MCL, Average Nitrate health-based returned to compliance (2016-10-03) 11.0 MG/L (limit 10.0)
2015-04-01 – 2015-06-30 MCL, Average Nitrate health-based returned to compliance (2016-10-03) 13.8 MG/L

What the regulator did about it

80 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.

DateActionBy
2026-02-04 St Violation/Reminder Notice state
2026-02-04 St Public Notif requested state
2025-12-30 St Violation/Reminder Notice state
2025-12-30 St Public Notif requested state
2025-11-20 St Compliance achieved state
2025-11-18 St Violation/Reminder Notice state
2025-11-18 St Public Notif requested state
2025-11-05 St Compliance achieved state
2025-10-29 St Violation/Reminder Notice state
2025-10-29 St Public Notif requested state
2025-10-29 St Compliance achieved state
2025-09-22 St Violation/Reminder Notice state
2025-09-22 St Public Notif requested state
2025-09-22 St Compliance achieved state
2025-09-22 St Compliance achieved state
2025-07-17 St Violation/Reminder Notice state
2025-07-17 St Public Notif requested state
2025-07-17 St Compliance achieved
System collected replacement samples on 5/18 and 6/1/2025 lmf 7/17/2025
state
2025-06-18 St Violation/Reminder Notice state
2025-06-18 St Public Notif requested state

20 most recent of 80; the rest are on the ECHO report.

Lead and copper

The latest 90th-percentile lead result is 0.0025 mg/L (sampling period ending 2026-06-30) against an action level of 0.015 mg/L, below it. Copper 2.47 mg/L against 1.3 mg/L, above it. 9 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 Lake George, Colorado?

Eleven Mile Ranch Association is the public water system serving 72 people in Park County, from surface water. Its EPA public water system id is CO0247017.

Where does Eleven Mile Ranch Association get its water?

Eleven Mile Ranch Association reports surface water as its primary source. EPA lists its source facilities as WELL NO 1, WELL NO 3, LAKE GEORGE INTAKE.

Does Eleven Mile Ranch Association have any drinking water violations?

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

Every provider in Park 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 →