Hydrohistorian
Town of Calhan
Serves Calhan.
Boundary traced from IRE. About 2 km².
Where the water comes from
| Facility | Kind | Water |
|---|---|---|
| WELL NO 1 TOWER WELL | Well | Groundwater |
| WELL NO 2 GORDON WELL | Well | Groundwater |
| WELL NO 3 RAILROAD WELL | 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 2026-09-09 · 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 ↗
Nothing open today, but 1 health-based violation appears on the federal record historically. The history is below.
EPA's own summary: violations in 6 of the last 12 quarters. In violation for, in EPA's words: 2039=Di(2-ethylhexyl) phthalate; 2456=Total Haloacetic Acids (HAA5); 2950=TTHM; 5000=Lead and Copper Rule. Currently: 5000=Lead and Copper Rule.
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.
Rule: Stage 1 Disinfectants and Disinfection Byproducts Rule.
Every violation record, as filed (1 of 1)
| Compliance period | What | About | Kind | Status | Measured |
|---|---|---|---|---|---|
| 2021-04-01 | Treatment Technique No Certif. Operator | DBP Stage 1 | health-based | returned to compliance (2021-04-09) |
What the regulator did about it
31 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 |
|---|---|---|
| 2026-01-29 | St Compliance achieved 52 vio RTC through lab resubmitting complete dataset fixing the incorrectly labeled samples that suggested high risk sampling didn't occur, retain both 90ths in records to show why the vio was issued (lfra 01/29/26); |
state |
| 2026-01-15 | St Violation/Reminder Notice | state |
| 2026-01-15 | St Public Notif requested | state |
| 2025-07-25 | St Violation/Reminder Notice | state |
| 2025-07-25 | St Public Notif requested | state |
| 2025-07-03 | St Compliance achieved Self-reported vio for failure to timely distribute service line material notifications RTC through the late distribution and submission of a notice copy along with updated COD (lfra 07/25/25); |
state |
| 2025-04-23 | St Violation/Reminder Notice | state |
| 2025-04-23 | St Public Notif requested | state |
| 2025-04-01 | St Compliance achieved Late submission of 6M2024-07 LCN RTC through notice copy and COD submitted on 04/01/25 (lfra 04/24/25); |
state |
| 2024-07-18 | St Compliance achieved FTM for CDBP in 2023 RTC through timely 2024 samples collected 07/18/24 reported 08/05/24 (lfra 11/12/24); |
state |
| 2023-10-27 | St Compliance achieved Q4 sample results received 10/27/23 (lfra 12/12/23) |
state |
| 2023-10-18 | St Violation/Reminder Notice | state |
| 2023-10-18 | St Public Notif requested | state |
| 2023-10-18 | St Violation/Reminder Notice | state |
| 2023-10-18 | St Public Notif requested | state |
| 2022-03-31 | St Violation/Reminder Notice | state |
| 2022-03-31 | St Compliance achieved | state |
| 2021-04-30 | St Public Notif received | state |
| 2021-04-09 | St Compliance achieved System submitted contact form with ORC at correct certification level on 4/9/2021. hpo 4/30/2021 |
state |
| 2021-04-05 | St Violation/Reminder Notice | state |
20 most recent of 31; the rest are on the ECHO report.
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, below it. 8 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 ↗
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 Calhan, Colorado?
The Town of Calhan is the public water system serving 780 people in El Paso County, from groundwater. Its EPA public water system id is CO0121075.
Where does the Town of Calhan get its water?
The Town of Calhan reports groundwater as its primary source. EPA lists its source facilities as WELL NO 1 TOWER WELL, WELL NO 2 GORDON WELL, WELL NO 3 RAILROAD WELL.
Does the Town of Calhan have any drinking water violations?
EPA's compliance record shows no open health-based violations for the Town of Calhan 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 El Paso 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 →