Colorado River 2027–2028 Operating Decision: What Commercial Water Customers Should Check Locally
The Interior Department’s final 2027–2028 Colorado River decision reduces Lower Basin deliveries by 1.25 million acre-feet annually; local tariffs remain separate.
Direct answer
On August 21, 2026, the Interior Department finalized 2027–2028 Colorado River operating guidelines and a ten-year framework. The decision calls for 1.25 million acre-feet of Lower Basin delivery reductions in each year. It does not set a local commercial tariff or calculate a facility bill; verify utility-specific rates and bill lines separately.
Aug. 21, 2026
Final decision date
The Interior Department finalized the federal action on August 21, 2026.
1.25M acre-feet
Annual Lower Basin reduction
The delivery reduction applies in each of 2027 and 2028.
700,000 acre-feet
Voluntary conservation and storage
A separate commitment over two years.
Conditional
State-share division
Arizona, California, and Nevada shares depend on implementation of the Lower Basin States’ proposed sharing agreement.
Federal decision and local bill map
Federal operating terms and local bill authority are separate decisions
Use the final federal decision for basin operations, then verify the local utility’s adopted tariff and operating rules separately.
- Decision point
- Final federal action
- Official treatment
- The Interior Department finalized 2027–2028 operating guidelines, issued a Record of Decision, and established a ten-year framework.
- Commercial bill boundary
- Treat the action as federal basin operations, not a local retail tariff.
- Decision point
- Annual Lower Basin reduction
- Official treatment
- The decision provides for 1.25 million acre-feet of delivery reductions in each year.
- Commercial bill boundary
- Do not convert the basin-wide volume into a local rate or facility bill.
- Decision point
- Conditional state shares
- Official treatment
- Arizona: 760,000 acre-feet; California: 440,000; Nevada: 50,000—only if the Lower Basin States implement their proposed sharing agreement.
- Commercial bill boundary
- Do not treat the proposed division as unconditional.
- Decision point
- Voluntary conservation and storage
- Official treatment
- The decision provides for 700,000 acre-feet over two years.
- Commercial bill boundary
- Keep this commitment separate from the 1.25-million-acre-foot annual reduction.
- Decision point
- Local bill authority
- Official treatment
- The federal decision does not set retail water, sewer or wastewater, stormwater, fixed, surcharge, restriction, or facility-bill terms.
- Commercial bill boundary
- Verify the local utility’s adopted tariff and operating rules separately.
Final federal action
What Interior finalized
Official source fact: On August 21, 2026, the Interior Department finalized operating guidelines for 2027 and 2028, issued a Record of Decision, and established a ten-year framework. This is a federal basin-operations decision, not a retail rate schedule.
Annual Lower Basin reduction
The Lower Basin reduction is 1.25 million acre-feet in each year
The final decision provides for 1.25 million acre-feet of Lower Basin delivery reductions in each of the next two years.
Conditional division
The state shares remain conditional
DOI reports a proposed split of 760,000 acre-feet for Arizona, 440,000 for California, and 50,000 for Nevada—but only if the Lower Basin States implement their proposed sharing agreement. Without that implementation condition, the source does not establish those state shares as unconditional.
Separate commitment
Voluntary conservation and storage are a separate commitment
The decision also provides for 700,000 acre-feet of voluntary conservation and storage over two years. Keep that commitment separate from the 1.25-million-acre-foot annual delivery reduction.
Local bill boundary
Federal deliveries do not equal a local commercial tariff
The federal decision does not set a utility’s retail water rate, sewer or wastewater rate, stormwater fee, fixed charge, drought surcharge, restriction, or facility bill. Any customer impact reaches a property through a local utility’s separately adopted tariff or operating rule. Do not infer a percentage increase or dollar impact from the federal delivery number.
Scope boundary
Scope of this guide
This guide explains the August 21, 2026 federal Colorado River operating decision and the local checks a commercial customer should make. It does not establish a local tariff, local restriction, percentage increase, dollar impact, or facility saving.
Decision checklist
What a commercial property should check locally
- 1Confirm the utility provider and service area on the bill.
- 2Find the current adopted local tariff and its effective date.
- 3Separate water, sewer or wastewater, stormwater, fixed, meter, tier, and surcharge lines.
- 4Treat a drought restriction or surcharge as active only when a current local source says it is.
- 5Record actual billed quantities and the billing period.
- 6Monitor the utility’s next formal rate or operating action.
Scope boundary
Where Smart Valve realistically fits
Smart Valve may be evaluated only against locally verified, technically addressable metered-volume exposure. This federal decision does not establish that exposure or calculate a saving.
Smart Valve does not change local fixed charges, stormwater fees, tariffs, restrictions, taxes, or account rules.
Related commercial water decisions
Mountain West commercial water intelligence
Track official regional water decisions while keeping local utility authority separate.
Denver commercial water-rate and drought-pricing checks
Review a local utility decision without transferring it across service areas.
Use the commercial water-bill audit checklist
Collect the provider, tariff, quantities, period, and separate printed lines.
Understand every commercial water-bill line
Separate usage-responsive charges from fixed and account-specific terms.
Read the WaterForge methodology
See how federal facts and local bill implications are kept distinct.
Primary source trail
Sources and retrieval details
Published: August 21, 2026Status checked: Final decision checked August 23, 2026Retrieved: August 23, 2026
Official final decision source for the 2027–2028 operating guidelines, annual Lower Basin reductions, conditional state shares, and voluntary conservation and storage commitment.
Editorial contact
Media & product inquiries
Send relevant corrections, launch information, approved assets, or testing opportunities to thesmartwatervalve@gmail.com. Contact does not guarantee coverage, favorable treatment, commercial placement, or a review.
Start with the local utility bill, not a basin-wide dollar estimate
Identify the local provider, current adopted tariff, billing period, quantities, and every separate bill line before requesting an assessment.