Boulder water and sewer rates
Who supplies water to Boulder houses, what it costs, and how the sewer charge works.
City of Boulder
City of Boulder, read and billed monthly: $21.51 service charge for a 3/4-inch meter inside the city, plus a price per 1,000 gallons set by your monthly water budget: $5.65 up to 60% of budget, $7.53 to 100%, $15.06 to 150%, $22.58 to 200% and $37.64 above 200%. Single-family accounts are allocated 7,000 gallons a month in winter (December-February).
| Use a month | Price per 1,000 gallons |
|---|---|
| Fixed charge | $21.51 a month |
| 0 to 4.2 thousand gallons | $5.65 |
| 4.2 to 7 thousand gallons | $7.53 |
| 7 to 10.5 thousand gallons | $15.06 |
| 10.5 to 14 thousand gallons | $22.58 |
| 14 to more | $37.64 |
- Source
- Barker Reservoir, North Boulder Creek, Carter Lake and Boulder Reservoir; which one reaches your home depends on the season
- Lead
- No lead service lines were found in the city's inventory; the 90th-percentile lead result in the 2024 tap tests was 2.0 ppb (action level 15)
- PFAS
- The city tested for six PFAS chemicals, including PFOS and PFOA, and none were detected
- Violations
- None in 2025
Sewer
City of Boulder wastewater inside the city: $17.20 monthly service charge for a 3/4-inch meter plus $8.86 per 1,000 gallons. Residential quantity charges use actual water use or Average Winter Consumption (the average of the December through March bills), whichever is less. The city says single-family use in the winter months averages less than 5,000 gallons.
Other charges on the utility bill
- Stormwater and flood management (in-city single-family lot up to 15,000 sq ft): $29.88 a month
Ways to pay less
- Had a leak? Ask for a water leak adjustment within 90 days. After a repaired leak, the excess water is generally billed at the lower Block 2 rate. The request and proof of repair must arrive within 90 days of the due date on the bill for the leak period. How: Submit the city's water leak adjustment request online, or contact Utility Billing at UTB@bouldercolorado.gov or 303-441-3260.
Pay or manage it
Sources
- City of Boulder: monthly water, wastewater and stormwater charges
- City of Boulder: water budgets
- City of Boulder 2026 drinking water quality report (2025 data)
- City of Boulder: 2026 water quality report release
- City of Boulder: water conservation
- City of Boulder: water leak adjustment
Checked October 20, 2026. Every number here comes from the public sources listed, matched by our checker.
Rates change every year; this page shows when it was last checked. Nothing here is legal, tax or insurance advice.