Hydrohistorian
Boundary traced from Douglas County. About 0 km².
Where the water comes from
| Facility | Kind | Water |
|---|---|---|
| ARAPAHOE WELL (2003) | Well | Groundwater |
| DENVER WELL (1980) | 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.
Compliance record
Source Register of another agency · fetched 2026-09-09 · verify at EPA ECHO ↗
EPA's summary: violations in 1 of the last 12 quarters; not a serious violator. Contaminants in violation in the last three years, in EPA's words: 0999=Chlorine. Currently in violation for: 0999=Chlorine.
1 health-based violation on the federal record all time, 0 violations open today. Most recent health-based: Treatment technique not met, compliance period from 2018-04-01, returned to compliance 2018-08-07.
| Period | Kind | Health-based | Status | Measured | Codes |
|---|---|---|---|---|---|
| 2018-04-01 | Treatment technique not met | yes | returned to compliance (2018-08-07) | v12 c0400 r210 |
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; 6 results on file.
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 →