Hydrohistorian
City of Black Hawk
Serves Black Hawk.
Modelled boundary. EPA estimated this service area (Random Forest) rather than tracing a utility-supplied map; treat the edge as approximate. About 1 km².
Where the water comes from
| Facility | Kind | Water |
|---|---|---|
| HIDDEN VALLEY CLEAR CREEK DIVERSION POND | Intake | Surface water |
| SPRING WELL G2 | Well | Groundwater under the influence of surface water |
| COUNTY ROAD SPRING WELL NO 1 | Well | Groundwater under the influence of surface water |
| COUNTY ROAD SPRING WELL NO 2 | Well | Groundwater under the influence of surface water |
| DORY HILL ROAD FMG WELL NO 4 | Well | Groundwater under the influence of surface water |
| DORY HILL RD FMG WELL NO 1 | Well | Groundwater under the influence of surface water |
| DORY HILL RD FMG WELL NO 2 | Well | Groundwater under the influence of surface water |
| SPRING WELL H | Well | Groundwater under the influence of surface water |
| SPRING WELL K | Well | Groundwater under the influence of surface water |
| SPRING WELL G1 | Well | Groundwater under the influence of surface water |
| BLACK HAWK NORTH CLEAR CREEK WELL 3 | Well | Groundwater under the influence of surface water |
| N CLEAR CREEK FIREHOUSE INTKE | Intake | Surface water |
| HIDDEN VALLEY CLEAR CREEK INF GALLERY | Intake | Surface water |
| NORTH CLEAR CREEK INF GALLERY | Intake | Surface water |
| G INTAKE INF GALLERY | Intake | Surface water |
| K1 INTAKE INF GAL | 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.
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
14 structures on DWR's record name this system as their contact (14). 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 |
|---|---|---|---|---|
| BLACK HAWK 4MI GULCH WL 1-48075-F 0705953 | WELL | GROUNDWATER: CLEAR CREEK | Clear Creek | contact: BLACK HAWK, CITY OF |
| BLACK HAWK 4MI GULCH WL 2-48606F 0705954 | WELL | GROUNDWATER: CLEAR CREEK | Clear Creek | contact: BLACK HAWK, CITY OF |
| BLACK HAWK AUG 0702540 | AUGMENTATION/REPLACEMENT PLAN | UNDEFINED | Clear Creek | contact: BLACK HAWK, CITY OF |
| BLACK HAWK AUG IMPACT REACH 0702901 | REACH (AGGREGATING) | CLEAR CREEK | Clear Creek | contact: BLACK HAWK, CITY OF |
| BLACK HAWK CENTRAL CITY SEWER 0702311 | OTHER | NORTH CLEAR CREEK | Clear Creek | contact: BLACK HAWK, CITY OF |
| BLACK HAWK NORTH CLEAR CR PUMP STATION GALLERY 1 0700783 | OTHER | NORTH CLEAR CREEK | Clear Creek | contact: BLACK HAWK, CITY OF |
| BLACK HAWK WL G-055474F 0705956 | WELL | GROUNDWATER: CLEAR CREEK | Clear Creek | contact: BLACK HAWK, CITY OF |
| CENTRAL CITY CHASE GULCH RESERVOIR 0703319 | RESERVOIR | CHASE GULCH | Clear Creek | contact: BLACK HAWK, CITY OF |
| HIDDEN VALLEY GROUNDWATER DIVERSION POINT 0705890 | WELL | GROUNDWATER: CLEAR CREEK | Clear Creek | contact: BLACK HAWK, CITY OF |
| HIDDEN VALLEY INFILTRATION GALLERY WELL 0706158 | WELL | GROUNDWATER: CLEAR CREEK | Clear Creek | contact: BLACK HAWK, CITY OF |
| HIDDEN VALLEY SURFACE DIVERSION 0700786 | DITCH | CLEAR CREEK | Clear Creek | contact: BLACK HAWK, CITY OF |
| MTN SUPPLY PL A 0700858 | PIPELINE | RALSTON CREEK | Clear Creek | contact: CITY OF BLACK HAWK (FORD, JIM) |
| MTN SUPPLY PL G 0700864 | PIPELINE | NORTH CLEAR CREEK | Clear Creek | contact: BLACK HAWK, CITY OF |
| NORTH CLEAR CREEK PUMP STATION 0700867 | PUMP | NORTH CLEAR CREEK | Clear Creek | contact: BLACK HAWK, CITY OF |
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
22 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 |
|---|---|---|
| 2021-10-27 | St Compliance achieved | state |
| 2021-10-26 | St Violation/Reminder Notice | state |
| 2021-10-26 | St Public Notif requested | state |
| 2020-08-27 | St Compliance achieved | state |
| 2020-08-10 | St Violation/Reminder Notice | state |
| 2020-08-10 | St Public Notif requested | state |
| 2020-04-03 | St Violation/Reminder Notice | state |
| 2020-04-03 | St Public Notif requested | state |
| 2020-04-03 | St Violation/Reminder Notice | state |
| 2020-04-03 | St Public Notif requested | state |
| 2020-04-03 | St Violation/Reminder Notice | state |
| 2020-04-03 | St Public Notif requested | state |
| 2020-03-24 | St Compliance achieved | state |
| 2019-02-20 | St Compliance achieved | state |
| 2019-02-08 | St Violation/Reminder Notice | state |
| 2019-02-08 | St Public Notif requested | state |
| 2019-02-08 | St Violation/Reminder Notice | state |
| 2019-02-08 | St Public Notif requested | state |
| 2018-02-26 | St Compliance achieved | state |
| 2017-05-01 | St Violation/Reminder Notice | state |
20 most recent of 22; the rest are on the ECHO report.
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, 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 2026-10-09 · verify at EPA UCMR occurrence data ↗
8 samples, 240 results, 2023-12-12 to 2024-09-12. No PFAS was detected at the reporting limits; lithium was measured up to 33.0 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 | 4 | 33.0 | 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 Black Hawk, Colorado?
The City of Black Hawk is the public water system serving 15,167 people in Gilpin County, from surface water. Its EPA public water system id is CO0124147.
Where does the City of Black Hawk get its water?
The City of Black Hawk reports surface water as its primary source. EPA lists its source facilities as HIDDEN VALLEY CLEAR CREEK DIVERSION POND, SPRING WELL G2, COUNTY ROAD SPRING WELL NO 1, COUNTY ROAD SPRING WELL NO 2.
Does the City of Black Hawk have any drinking water violations?
EPA's compliance record shows no open health-based violations for the City of Black Hawk 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 Gilpin 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 →