Tucson FY2027 Commercial Water Rates: WAC Tiers and Meter Charges
Tucson’s FY2027 commercial water rates took effect July 6. See incorporated WAC tiers, meter-size charges, per-CCF fees, and a qualified bill model.
Direct answer
Tucson’s FY2027 commercial water rates took effect July 6, 2026. An incorporated account pays $3.66 per CCF through its winter average consumption (WAC), $4.88 from 101%–145% of WAC, and $5.20 above 145%, plus meter-size and per-CCF fees. The 3.5% system revenue adjustment is not an individual-bill multiplier; verify whether the separate GSI line appears.
July 6
Effective date
Adopted FY2027 schedule
$3.66
Inside-city base
Per CCF through WAC
$5.20
Inside-city top tier
Per CCF above 145% WAC
$125.06
2-inch fixed service
Monthly; usage does not change it
Official source facts
The adopted schedule took effect July 6
The City of Tucson approved its FY2027–FY2030 water-rate and fee adjustments at a May 19, 2026 public hearing. Tucson Water says the updated schedule took effect July 6, 2026 and supports operations, aging-infrastructure replacement, treatment and delivery, Central Arizona Project obligations, debt repayment, and reserve targets.
The city describes FY2027 as a 3.5% annual revenue adjustment, reduced from an earlier 5.5% plan. That is a system funding target, not a safe multiplier for an individual commercial bill. A property’s result depends on its customer class, incorporated or unincorporated service, winter average consumption, summer use, meter size, and other bill lines.
Bill mechanics
Winter average consumption sets the summer thresholds
Winter average consumption, or WAC, is based on December through February use. During those winter months, incorporated commercial consumption is billed at $3.66 per CCF. From March through November, use through 100% of WAC remains $3.66 per CCF, the portion from 101% through 145% of WAC is $4.88, and the portion above 145% is $5.20.
Unincorporated commercial accounts have a separate schedule: $4.35 per CCF through WAC, $5.80 from 101% through 145%, and $6.18 above 145%. Do not mix those values with the incorporated example below, and do not apply the highest tier to every unit of water.
Fixed and usage-linked lines
Meter size and per-CCF fees must be modeled separately
Tucson Water’s monthly service charge applies regardless of use and rises with meter size. The incorporated schedule lists $20.65 for a 5/8-inch meter, $125.06 for a 2-inch meter, and $415.89 for a 4-inch meter. A usage reduction does not lower that fixed service line.
The same commercial bill page lists a $1.25-per-CCF water-supply fee and a $0.15-per-CCF conservation fee. It also lists a $0.15-per-CCF green stormwater infrastructure fee but says that line applies to “residents inside Tucson city limits.” Because that wording does not clearly establish universal commercial applicability, verify the GSI line on the actual account before modeling it.
Commercial implication
Summer operations can move a property across two marginal tiers
Tucson’s commercial classification includes hotels and motels, restaurants, laundries, hospitals, service stations, rest homes, retail and wholesale businesses, and government offices. For those properties, the budget question is not simply whether gallons rose. It is how much March–November use sits above the account’s established WAC.
A hotel, restaurant, laundry, healthcare facility, car wash, campus, or other high-use operation should compare each summer month with WAC, then isolate the gallons in each block. Meter size and service area should be confirmed before the result is rolled into an operating forecast.
Full-bill boundary
This water schedule is not an all-in utility bill
The official commercial page identifies taxes by municipality and separate paths for fire-protection and reclaimed-water service. This article excludes those lines. It also does not assign a sewer or wastewater formula because the cited Tucson Water schedule does not establish one for this commercial example.
Keep sewer, wastewater, taxes, fire service, reclaimed service, and any account-specific adjustment outside the model until each line is verified. If GSI appears, treat it as a separate usage-linked line; do not confuse it with a parcel-based stormwater fee or assume it applies to every commercial account.
Smart Valve calculation — not a Tucson Water bill quote
A 150-CCF summer month with a 100-CCF WAC
Assume an incorporated commercial account, a 2-inch meter, a 100-CCF WAC, and 150 CCF of March–November use. The model includes tiered water, supply, conservation, and fixed service. It excludes GSI, taxes, sewer/wastewater, fire, reclaimed service, and other account-specific lines.
| Included line | 150 CCF | 120 CCF | Difference |
|---|---|---|---|
| Tiered water commodity | $611.60 | $463.60 | −$148.00 |
| Water-supply fee | $187.50 | $150.00 | −$37.50 |
| Conservation fee | $22.50 | $18.00 | −$4.50 |
| 2-inch fixed service | $125.06 | $125.06 | $0.00 |
| Included water total | $946.66 | $756.66 | −$190.00 |
At 150 CCF, the commodity line is 100 × $3.66 + 45 × $4.88 + 5 × $5.20 = $611.60. At 120 CCF, it is 100 × $3.66 + 20 × $4.88 = $463.60. The fixed service line stays unchanged, and every excluded line still requires bill-level verification.
20% usage check
$190/summer month
Qualified 20% usage-reduction exposure
In the declared example, physical use falls from 150 to 120 CCF. The 30-CCF difference removes all Block 3 use and part of Block 2, and it lowers the modeled supply and conservation fees. The included lines fall from $946.66 to $756.66 for that summer month.
Boundary: This is reproducible arithmetic, not a savings promise. Do not annualize it without actual monthly use and WAC exposure. Fixed service, taxes, sewer/wastewater, fire, reclaimed service, and unverified GSI are outside the reduction figure.
Decision checklist
What to check first on the bill
- 1Confirm that the account is classified commercial and whether service is incorporated or unincorporated.
- 2Find the account’s December–February WAC and compare it with each March–November billing period.
- 3Verify meter size and separate the monthly service charge from all per-CCF lines.
- 4Check whether water-supply, conservation, and GSI fees appear and whether the posted units match the bill.
- 5Keep taxes, sewer/wastewater, fire, reclaimed service, and other adjustments outside the forecast until verified.
Scope boundary
Where Smart Valve realistically fits
Smart Valve can be screened only against controllable metered volume and the usage-linked lines attached to that volume. It does not change Tucson Water’s WAC, service area, customer class, meter size, fixed service charge, taxes, or utility policy.
A credible assessment starts with 12 months of bills, the current meter and line conditions, and the property’s operating profile. The local calculator can frame exposure, but it does not reproduce Tucson’s WAC blocks or every account-specific line.
Related commercial water decisions
Track Mountain West commercial rate signals
Compare adopted rates, drought rules, meter charges, and growth costs.
Compare Phoenix’s seasonal commercial water mechanics
See how another Arizona utility separates seasonal and service lines.
Separate fixed and usage-linked bill lines
Build a bill map before applying any reduction assumption.
Apply the hotel water-cost decision path
Connect guest, laundry, kitchen, pool, and irrigation loads.
Prepare a commercial bill audit
Collect class, meter, WAC, usage, and bill-line evidence.
See how Smart Valve qualifies estimates
Review source, assumption, and site-verification boundaries.
Frequently asked questions
What does WAC mean on a Tucson commercial water account?
WAC means winter average consumption. Tucson Water uses December through February consumption to set the account’s base-use threshold for the March–November commercial surcharge blocks.
What are Tucson’s incorporated FY2027 commercial water tiers?
From March through November, the incorporated schedule is $3.66 per CCF through 100% of WAC, $4.88 from 101% through 145% of WAC, and $5.20 above 145%. Winter consumption is $3.66 per CCF.
Does Tucson’s 3.5% revenue adjustment raise every commercial bill by 3.5%?
No. The city describes a 3.5% system revenue adjustment. An individual bill depends on WAC, summer use, service area, meter size, usage fees, taxes, and other account-specific lines.
Does a 20% usage reduction cut the entire Tucson bill by 20%?
No. A usage reduction can change tiered commodity and applicable per-CCF lines, but it does not reduce fixed meter service, taxes, or other non-usage charges. Actual WAC and monthly use determine the tier effect.
Primary source trail
Sources and retrieval details
Published: Current FY2027 schedule · Effective: July 6, 2026 · Retrieved: July 11, 2026
Controlling source for commercial WAC tiers, incorporated and unincorporated rates, meter-size service charges, per-CCF fees, customer-class examples, and stated GSI wording.
Published: Approved May 19, 2026 · Effective: July 6, 2026 · Retrieved: July 11, 2026
Primary source for adoption, effective date, 3.5% system revenue adjustment, and operating, infrastructure, CAP, debt, and reserve drivers.
Published: FY2027–FY2030 rate schedule · Effective: July 6, 2026 · Retrieved: July 11, 2026
Official schedule corroborating the commercial blocks, meter charges, and applicable water-resource and conservation lines used in the model.
Screen the usage-linked part of the Tucson bill
Use the calculator for directional metered-volume exposure, then submit actual bills for review. The calculator does not reproduce WAC, city-limit status, meter charges, conditional GSI, sewer, taxes, or other Tucson account lines.