Roxborough Water & Sanitation District☆

Where the water comes from

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

Sells water to 1 system: DOMINION WSD.

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 ↗

EPA's own summary: violations in 0 of the last 12 quarters.

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.

What the regulator did about it

4 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.

Lead and copper

The latest 90th-percentile lead result is 0.005 mg/L (sampling period ending 2025-12-31) against an action level of 0.015 mg/L, below it. 10 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 ↗

4 samples, 120 results, 2024-04-02 to 2025-01-06. No PFAS was detected at the reporting limits; lithium was measured up to 9.09 µg/L (no federal limit).

Rows shown: every detected contaminant plus the regulated PFAS and lithium; the rest were below their reporting limits. These are UCMR monitoring samples, not compliance samples. EPA's April 2024 rule set 4.0 ng/L (0.004 µg/L) for PFOA and PFOS, the same as UCMR 5's reporting limit, so any detection of either is at or above it; the rule's compliance date and its other limits have been under revision since 2025 and are not applied here. State PFAS sampling is on CDPHE's pages ↗.

Common questions

Who provides drinking water in Littleton, Colorado?

Roxborough Water & Sanitation District is the public water system serving 13,765 people in Douglas County, from surface water. Its EPA public water system id is CO0118055.

Where does Roxborough Water & Sanitation District get its water?

Roxborough Water & Sanitation District reports surface water as its primary source. EPA lists its source facilities as RAMPART RESERVOIR.

Does Roxborough Water & Sanitation District have any drinking water violations?

EPA's compliance record shows no open health-based violations for Roxborough Water & Sanitation District at the last monthly fetch. Older and non-health-based entries, if any, are listed on this page.