Hydrohistorian
Modelled boundary. EPA estimated this service area (Random Forest) rather than tracing a utility-supplied map; treat the edge as approximate. About 2 km².
Where the water comes from
| Facility | Kind | Water |
|---|---|---|
| PURCHASED FROM 135477 LITTLE THOMPSON | Consecutive connection (purchased) | Surface water · from LITTLE THOMPSON WD |
| ROUGH AND READY DITCH | Intake | Surface water |
| CARTER LAKE | 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.
Wholesale connections
Buys water from LITTLE THOMPSON WD.
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
2 structures on DWR's record 2 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 |
|---|---|---|---|---|
| CARTER LAKE RES 0504513 | 3 | SAINT VRAIN CREEK | St. Vrain Creek | intake name: CARTER LAKE |
| ROUGH READY DITCH 0500527 | 1 | SAINT VRAIN CREEK | St. Vrain Creek | intake name: ROUGH AND READY DITCH |
Compliance record
Source Register of another agency · fetched 2026-09-09 · verify at EPA ECHO ↗
EPA's summary: violations in 0 of the last 12 quarters; not a serious violator.
No health-based or open violation on the federal record for this system.
Lead and copper: the latest 90th-percentile lead result is 0.002 mg/L (sampling period ending 2025-12-31) against an action level of 0.015 mg/L; 19 results on file, 1 lead result over the action level all time.
SDWIS federal reporting carries violations and lead/copper percentiles only; nitrate, disinfection by-product and PFAS sample results are not in it. Codes are EPA's (violation, contaminant, rule); the ECHO report expands them.
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).
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 →