Well Water and Groundwater Subdistricts in Alamosa County, Colorado

Two separate systems: a DWR well permit, and a subdistrict on top of it

A well anywhere in Colorado, including Alamosa County, needs a permit from the Colorado Division of Water Resources (DWR) -- administered locally out of DWR's Division 3 office in Alamosa. That permit determines whether the well can be used at all and for what purpose. Subdistrict No. 1 of the Rio Grande Water Conservation District is a separate, additional layer that applies specifically to wells within its boundary, which covers the Mosca-Hooper area of Alamosa County and extends into parts of Rio Grande and Saguache counties. Subdistrict No. 1 was recognized as a legal entity in 2006, formed to help restore balance between the aquifer's available supply and the volume being pumped so the San Luis Valley's irrigated agriculture stays sustainable.

Membership in the subdistrict isn't something you separately apply to join or can opt out of by preference -- a well's location inside the mapped boundary is what triggers subdistrict obligations, on top of (not instead of) the underlying DWR permit. Before closing on a parcel with an existing agricultural well, or before assuming you can drill a new one, confirm with the district directly whether the specific parcel falls inside Subdistrict No. 1's boundary.

How the pumping fee and reporting actually work

Subdistrict No. 1 charges a variable fee tied to the gap between how much groundwater a well actually pumps and the surface-water credit allocated to that parcel, measured through a water flow meter or another method the State Engineer approves; the district's Board sets a Water Value that gets applied to that differential to calculate the fee owed. In practice, that means a farm unit's fee changes from year to year based on metered pumping and the credits the operation has available, rather than being a flat annual charge -- so a well's fee history is worth asking about specifically rather than assumed from a neighboring parcel's experience.

The district also runs conservation programs aimed at reducing irrigation water use and restoring groundwater levels, and it maintains its own set of forms -- including a Farm Unit Update Submission and a Surface Water Credit Lease Form -- through which a farm unit's enrollment details and credits get updated each year. If you're buying land with an existing well inside the subdistrict, ask the seller for the parcel's current Farm Unit records and recent annual reports rather than relying on a general description of the subdistrict system.

Where to go for what

• For the underlying well permit itself (drilling, permitted use, and permit records): DWR Division 3, based in Alamosa.
• For subdistrict boundary confirmation, a farm unit's fee history, enrollment forms, and conservation-program options: Rio Grande Water Conservation District directly, at (719) 589-6301 or its Alamosa office.
• For an active water-court proceeding or a subdistrict's current sustainability plan status, which can shift subdistrict rules over time: the district's own published court-ruling updates, since these proceedings have continued into 2026.

Because well administration here runs through two genuinely separate systems -- state permit and district subdistrict -- don't assume a real estate listing or an older title report captures both. A well can be fully permitted by the state and still carry active subdistrict fee and reporting obligations that only the district's own records will show.