Westminster Commercial Water Rates: 2026 Tier, Sewer, and Stormwater Bill Checks
Westminster, Colorado’s 2026 rate schedule separates commercial water tiers, sewer average-winter-use charges, meter fixed charges, and stormwater fees for commercial and apartment properties.
Quick Answer
Westminster’s 2026 schedule lists commercial water at $9.15 per 1,000 gallons for Tier 1 and $11.21 for the Tier 2 surcharge inside city limits. Sewer for all others is $10.29 per 1,000 gallons of average winter use, and commercial stormwater is $1.93 per month per 1,000 square feet of impervious area.
$9.15
Commercial Tier 1
Per 1,000 gal, in city
$11.21
Commercial Tier 2
Surcharge rate
$10.29
Sewer
All others, in city
$1.93
Stormwater
Per 1,000 sq. ft. impervious
What changed in Westminster
Source-reported facts: Westminster says the city approved a 4.0% water rate adjustment schedule for 2025 and 2026 to account for the increasing cost of providing clean, safe, and affordable drinking water.
The 2026 rate schedule lists commercial water rates per 1,000 gallons, sewer rates based on average winter use, water utility infrastructure fixed charges by meter size, and stormwater management fees.
Who may be affected
Commercial properties, apartments, HOAs, public/government users, irrigated properties, retail centers, hotels, restaurants, healthcare facilities, car washes, and industrial properties should check customer class and service area before applying a rate.
For inside-city service, commercial water is listed at $9.15 per 1,000 gallons for Tier 1 and $11.21 for Tier 2 surcharge. Shaw Heights and outside-city rates are higher multipliers and should not be modeled with inside-city assumptions.
Why sewer and stormwater need separate treatment
Westminster sewer is based on average monthly water consumption during the January through March calculation period, divided by 1,000. For inside-city service, all others are billed at $10.29 per unit with a $20.58 minimum charge.
Stormwater is not a normal usage charge. The city lists stormwater for all other property, including commercial, apartments, and townhomes, at $1.93 per month per 1,000 square feet of impervious area.
What a 20 percent usage reduction could mean
Directional estimate: assume an inside-city commercial Westminster account has 100,000 gallons per month of controllable water in Tier 1 and sewer exposure follows the average-winter-use calculation. The combined water plus sewer variable rate is $19.44 per 1,000 gallons.
A 20 percent usage reduction equals 20,000 gallons, or 20 units. At $19.44 per unit, that is about $388.80 per month in variable exposure before fixed infrastructure charges, stormwater impervious-area fees, service area multipliers, tier breakpoints, site conditions, and installation feasibility.
What to check first on your bill
Confirm inside-city, Shaw Heights, or outside-city service; commercial tier; meter size; fixed infrastructure charge; average winter sewer calculation; stormwater impervious area; and whether reclaimed irrigation or multi-unit rates apply.
If a commercial account has high irrigation or stormwater exposure, do not assume domestic usage reduction changes those lines. Irrigation, reclaimed water, and impervious-area stormwater fees need separate models.
Where Smart Valve fits
Smart Valve may be relevant when a Westminster commercial account has significant controllable metered water volume and a technically qualified site. It cannot reduce stormwater charges based on impervious area, fixed infrastructure charges, or non-usage fees.
The assessment should model commercial water, sewer average winter use, and stormwater separately before applying any usage-reduction scenario.
What to Do Next
Confirm service area before applying inside-city commercial rates.
Separate sewer average-winter-use charges from current-month water usage.
Exclude impervious-area stormwater fees from usage-reduction savings.
FAQ
What are Westminster 2026 inside-city commercial water rates?
Westminster lists commercial water at $9.15 per 1,000 gallons for Tier 1 and $11.21 for the Tier 2 surcharge inside city limits.
How is Westminster sewer billed for commercial and other non-residential accounts?
The city says sewer units are based on average monthly water consumption during January through March, divided by 1,000. Inside-city all others are listed at $10.29 per unit with a $20.58 minimum.
Can usage reduction lower Westminster stormwater charges?
Not normally. Westminster lists commercial/apartment/townhome stormwater at $1.93 per month per 1,000 square feet of impervious area, not monthly water consumption.
Sources
Related Commercial Water Resources
Model This Market Against Your Actual Bill
Use your local rate, current monthly bill, and billed usage to estimate how much controllable volume reduction could offset this market pressure.
