Flagstaff water and sewer rates
Who supplies water to Flagstaff houses, what it costs, and how the sewer charge works.
City of Flagstaff Water Services
City of Flagstaff water rates effective January 1, 2026, inside city, single family: a monthly fixed charge by meter size plus four tiers per 1,000 gallons, each with an energy rate and a WRIP fee
| Use a month | Price per 1,000 gallons |
|---|---|
| Fixed charge | $15.30 a month |
| 0 to 3.5 thousand gallons | $6.33 |
| 3.5 to 6.2 thousand gallons | $6.68 |
| 6.2 to 11.5 thousand gallons | $11.61 |
| 11.5 to more | $21.50 |
- Source
- Upper Lake Mary, seasonal runoff from the Inner Basin of the San Francisco Peaks, and deep groundwater wells; Lake Mary water typically makes up 20-30% of the annual supply.
- Arsenic
- Highest 2025 result 6.9 ppb (limit 10 ppb), no violation.
- Lead
- 90th-percentile lead was 3.6 ppb in 2023 sampling (action level 15 ppb); 0 of 30 sites were above it.
- Violations
- Two reporting violations in 2025; the city says there are no health concerns related to them.
Sewer
Flagstaff's 2026 inside-city sewer rates are a monthly fixed charge of $11.76 for a 3/4-inch meter plus $6.20 per 1,000 gallons for residential customers. Residential sewer usage is based on WQA (winter months: Dec, Jan, Feb, Mar).
Other charges on the utility bill
- Stormwater, 3 ERUs (the city's average residential property): $17.64 a month
Ways to pay less
- Rain barrels: 10% stormwater credit. Homes that collect at least 300 gallons of roof rainwater in rain barrels and use it for irrigation can get a 10% credit on the stormwater fee on the water bill. A new account holder has to re-apply. How: Submit the completed application to solutions@flagstaffaz.gov or mail it to City of Flagstaff Stormwater, 2323 N Walgreens Street, Suite 1.
Pay or manage it
Sources
- City of Flagstaff water & sewer rates effective January 1, 2026
- City of Flagstaff Water Services rates
- City of Flagstaff stormwater fees
- City of Flagstaff Stormwater Utility Rate Adjustment Study (March 2023)
- City of Flagstaff Ordinance 2023-03 (stormwater service charges)
- City of Flagstaff 2024 water and wastewater rate presentation
- City of Flagstaff Stormwater Credit Manual
Checked October 21, 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.