Hydrohistorian
Silver Heights Water & Sanitation District
Boundary traced from Douglas County. About 2 km².
Where the water comes from
| Facility | Kind | Water |
|---|---|---|
| ARAPAHOE WELL NO 1 | Well | Groundwater |
| WELL NO 2 DENVER DAWSON | Well | Groundwater |
| ARAPAHOE WELL NO 2 | 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 2026-10-06 · 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 ↗
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.
What the regulator did about it
6 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 |
|---|---|---|
| 2022-04-29 | St Compliance achieved System distributed its 2021 CCR on 4/29/2022, resolving this violation, jlm. |
state |
| 2021-08-02 | St Violation/Reminder Notice | state |
| 2021-08-02 | St Public Notif requested | state |
| 2017-02-28 | St Compliance achieved | state |
| 2016-12-14 | St Violation/Reminder Notice | state |
| 2016-12-14 | St Public Notif requested | state |
Lead and copper
The latest 90th-percentile lead result is 0.001 mg/L (sampling period ending 2028-12-31) against an action level of 0.015 mg/L, below it. 13 results on file, 1 lead result over the action level all time.
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 Castle Rock, Colorado?
Silver Heights Water & Sanitation District is the public water system serving 301 people in Douglas County, from groundwater. Its EPA public water system id is CO0118075.
Where does Silver Heights Water & Sanitation District get its water?
Silver Heights Water & Sanitation District reports groundwater as its primary source. EPA lists its source facilities as ARAPAHOE WELL NO 1, WELL NO 2 DENVER DAWSON, ARAPAHOE WELL NO 2.
Does Silver Heights Water & Sanitation District have any drinking water violations?
EPA's compliance record shows no open health-based violations for Silver Heights Water & Sanitation District at the last monthly fetch. Older and non-health-based entries, if any, are listed on this page.
Every provider in Douglas 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 →