Hydrohistorian
Water providers in Costilla County, Colorado
Who is my water provider?
Type a Colorado address, or use your location. This names the community water systems whose EPA service-area boundary contains that point.
Blue is a boundary a utility or county traced; amber is one EPA modelled from census places. Click an area for the system. Systems with no boundary on file are in the table but not on the map.
Towns in Costilla County
Each names the systems whose service area covers it.
Every community water system in Costilla County
| System | Serves | Source | Service area | Water district |
|---|---|---|---|---|
| San Luis Water & Sanitation District | 629 | Groundwater | modelled | Culebra Creek |
| Costilla County Water System | 561 | Groundwater | modelled | Culebra Creek |
| Fort Garland Water & Sanitation District | 477 | Groundwater | modelled | Trinchera Creek |
| Town of Blanca | 469 | Groundwater | traced | Trinchera Creek |
| Garcia Domestic Wua | 100 | Groundwater | modelled | Culebra Creek |
| Viejo San Acacio | 45 | Groundwater | modelled | Culebra Creek |
| San Acacio Domestic Water Association | 40 | Groundwater | modelled | Culebra Creek |
| Lake Sanchez Estates | 34 | Groundwater | none on file | — |
Common questions
How many water providers are in Costilla County, Colorado?
8 community water systems serve Costilla County, Colorado. The largest is San Luis Water & Sanitation District, which reports serving 629 people.
Who is my water provider in Costilla County?
It depends on your address: 8 community systems serve parts of Costilla County. Enter an address in the lookup on this page and it will name the systems whose EPA service-area boundary contains that point.
Why is a system in Costilla County missing from the map?
1 of the 8 systems here have no service-area boundary in EPA's file, so they cannot be drawn. They are still in the table on this page, with their source and compliance record.
Nearby counties
Systems and counties from EPA SDWIS federal reporting, fetched 2026-09-08; boundaries from EPA's Community Water System Service Area Boundaries (v3, 2026). A county row here is the county SDWIS files for the system, which is where it serves customers, not necessarily where its intakes are. Report a problem →