Hydrohistorian
Perry Park Water & Sanitation District
Serves Perry Park.
Boundary traced from Douglas County. About 33 km².
Where the water comes from
| Facility | Kind | Water |
|---|---|---|
| WP 2 WELL | Well | Groundwater under the influence of surface water |
| A2 WELL | Well | Groundwater |
| A3 WELL | Well | Groundwater |
| WP1 WELL | Well | Groundwater under the influence of surface water |
| D4 WELL | Well | Groundwater |
| GLEN GROVE WELL | Well | Groundwater under the influence of surface water |
| DAKOTA NO 1 WELL | Well | Groundwater |
| ARAPAHOE NO 4 AKA SAGEPORT WELL | Well | Groundwater |
| ARAP NO 1 SCHOOL EMER FIRE USE | Well | Groundwater |
| GRANT DITCH WELL PA PASSED | Well | Groundwater under the influence of 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.
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
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 2026-09-09 · 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 1 of the last 12 quarters. In violation for, in EPA's words: 3014=E. COLI.
No health-based or open violation on the federal record for this system.
What the regulator did about it
40 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 |
|---|---|---|
| 2024-04-30 | St Compliance achieved System contacted lab and had them upload correct facility ID for results lmf 7/25/2024 |
state |
| 2024-01-22 | St Violation/Reminder Notice | state |
| 2024-01-22 | St Public Notif requested | state |
| 2023-02-27 | St Compliance achieved | state |
| 2023-02-16 | St Violation/Reminder Notice | state |
| 2023-02-16 | St Public Notif requested | state |
| 2023-02-06 | St Compliance achieved | state |
| 2023-02-02 | St Violation/Reminder Notice | state |
| 2023-02-02 | St Public Notif requested | state |
| 2022-05-31 | St Compliance achieved System collected next required routine sampling in May 2022 lmf 12/5/2023 |
state |
| 2022-05-31 | St Compliance achieved System collected but it was reported late lmf 12/5/2023 |
state |
| 2022-04-28 | St Violation/Reminder Notice | state |
| 2022-04-28 | St Public Notif requested | state |
| 2022-04-28 | St Violation/Reminder Notice | state |
| 2022-04-28 | St Public Notif requested | state |
| 2021-08-03 | St Compliance achieved | state |
| 2021-07-13 | St Violation/Reminder Notice | state |
| 2021-07-13 | St Public Notif requested | state |
| 2021-07-13 | St Violation/Reminder Notice | state |
| 2021-07-13 | St Public Notif requested | state |
20 most recent of 40; the rest are on the ECHO report.
Lead and copper
The latest 90th-percentile lead result is 0.001 mg/L (sampling period ending 2025-12-31) against an action level of 0.015 mg/L, below it. 7 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 2026-09-09 · verify at EPA UCMR occurrence data ↗
10 samples, 240 results, 2025-02-19 to 2025-11-03. No PFAS was detected at the reporting limits; lithium was measured up to 58.0 µg/L (no federal limit).
| Contaminant | Results | Detected | Highest, µg/L | Reporting limit |
|---|---|---|---|---|
| HFPO-DA | 8 | 0 | < 0.005 | 0.005 |
| PFHxS | 8 | 0 | < 0.003 | 0.003 |
| PFNA | 8 | 0 | < 0.004 | 0.004 |
| PFOA | 8 | 0 | < 0.004 | 0.004 |
| PFOS | 8 | 0 | < 0.004 | 0.004 |
| lithium | 8 | 8 | 58.0 | 9.0 |
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 Larkspur, Colorado?
Perry Park Water & Sanitation District is the public water system serving 3,890 people in Douglas County, from groundwater under the influence of surface water. Its EPA public water system id is CO0118045.
Where does Perry Park Water & Sanitation District get its water?
Perry Park Water & Sanitation District reports groundwater under the influence of surface water as its primary source. EPA lists its source facilities as WP 2 WELL, A2 WELL, A3 WELL, WP1 WELL.
Does Perry Park Water & Sanitation District have any drinking water violations?
EPA's compliance record shows no open health-based violations for Perry Park Water & Sanitation District at the last monthly fetch. Older and non-health-based entries, if any, are listed on this page.
Places this system serves
Census places its EPA service-area boundary substantially covers. Each page lists every system serving that place.
Every provider in Douglas County.
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 →