Hydrohistorian
San Acacio Domestic Water Association
Modelled boundary. EPA estimated this service area (Random Forest) rather than tracing a utility-supplied map; treat the edge as approximate. About 0 km².
Where the water comes from
| Facility | Kind | Water |
|---|---|---|
| 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 2026-09-09 · 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 ↗
7 violations open now, none health-based. These are monitoring, reporting or notice requirements — a sample not taken, or a result not filed on time. They are real obligations, but they are not a finding about the water itself.
EPA's own summary: violations in 12 of the last 12 quarters, significant non-compliance in 3. In violation for, in EPA's words: 7500=Public Notice. Currently: 7500=Public Notice.
What happened
All 10 violation records on file, grouped into the 4 distinct things EPA's codes describe. Dates are the compliance period the violation is filed against.
Rule: Public Notice Rule -- telling customers about a problem.
Rule: Public Notice Rule -- telling customers about a problem.
EPA violation code 2E, contaminant 5200 — not in the code table this build carries.
Rule: Stage 1 Disinfectants and Disinfection Byproducts Rule.
Every violation record, as filed (10 of 10)
| Compliance period | What | About | Kind | Status | Measured |
|---|---|---|---|---|---|
| 2026-03-21 | PN Violation without NPDWR Violation | Public Notice | other | open | |
| 2026-03-07 | PN Violation without NPDWR Violation | Public Notice | other | open | |
| 2025-09-08 | PN Violation for NPDWR Violation | Public Notice | other | open | |
| 2025-06-06 | PN Violation for NPDWR Violation | Public Notice | other | open | |
| 2025-03-08 | PN Violation for NPDWR Violation | Public Notice | other | open | |
| 2024-12-08 | PN Violation for NPDWR Violation | Public Notice | other | open | |
| 2024-10-17 | code 2E | health-based | returned to compliance (2025-10-15) | ||
| 2023-02-10 | PN Violation for NPDWR Violation | Public Notice | other | open | |
| 2023-01-01 | Treatment Technique No Certif. Operator | DBP Stage 1 | health-based | returned to compliance (2023-04-17) | |
| 2017-08-01 | Treatment Technique No Certif. Operator | DBP Stage 1 | health-based | returned to compliance (2018-04-16) |
What the regulator did about it
122 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 |
|---|---|---|
| 2026-04-17 | St Violation/Reminder Notice | state |
| 2026-04-17 | St Violation/Reminder Notice | state |
| 2025-12-10 | St Compliance achieved system submitted copy of notice and certificate of delivery on 12/10/2025 - znk 12/11/2025 |
state |
| 2025-10-15 | St Compliance achieved system submitted completed LSLI on 10/15/2025 - znk 11/07/2025 |
state |
| 2025-09-29 | St AO (w/penalty) issued DW.09.25.112850 issued on 9/29/2025. ejc |
state |
| 2025-09-26 | St Violation/Reminder Notice | state |
| 2025-08-13 | St Compliance achieved system sampled and reported fluoride for 3Y2023-2025 - znk 09/09/2025 |
state |
| 2025-07-16 | St Violation/Reminder Notice | state |
| 2025-06-30 | St Compliance achieved System submitted 2025 CCR, thus 2024 violation SOX eligible - znk 07/02/2025 |
state |
| 2025-04-21 | St Violation/Reminder Notice | state |
| 2025-01-22 | St Violation/Reminder Notice | state |
| 2025-01-03 | St Violation/Reminder Notice | state |
| 2025-01-03 | St Public Notif requested | state |
| 2024-11-07 | St Violation/Reminder Notice | state |
| 2024-11-07 | St Public Notif requested PN schedule superseded by EO DW.09.25.112850 issued on 09/29/2025 - znk 10/08/2025 |
state |
| 2024-11-07 | St Violation/Reminder Notice | state |
| 2024-11-07 | St Public Notif requested | state |
| 2024-07-15 | St Violation/Reminder Notice | state |
| 2024-07-15 | St Public Notif requested | state |
| 2023-07-31 | St Compliance achieved Returned to compliance when submitted CCR to portal 7/31/2023 |
state |
20 most recent of 122; the rest are on the ECHO report.
Lead and copper
The latest 90th-percentile lead result is 0.0005 mg/L (sampling period ending 2025-12-31) against an action level of 0.015 mg/L, below it. 6 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 San Luis, Colorado?
San Acacio Domestic Water Association is the public water system serving 40 people in Costilla County, from groundwater. Its EPA public water system id is CO0112850.
Where does San Acacio Domestic Water Association get its water?
San Acacio Domestic Water Association reports groundwater as its primary source. EPA lists its source facilities as WELL NO 2.
Does San Acacio Domestic Water Association have any drinking water violations?
EPA's compliance record shows no open health-based violations for San Acacio Domestic Water Association at the last monthly fetch. Older and non-health-based entries, if any, are listed on this page.
Every provider in Costilla 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 →