Questar Gas Company (Enbridge Gas Utah) Rate Selection Guide
Questar Gas Company, operating as Enbridge Gas Utah, is a regulated natural gas local distribution company serving over 1.2 million customers across Utah, Wyoming, and Idaho. It offers a customer portal with 13 months of usage history and an active Green Button Connect My Data program for third-party access.
Questar Gas Company (Enbridge Gas Utah) Rate Schedule Comparison
| Schedule | Type | Rate | Best For |
|---|---|---|---|
| GS — General Service | Bundled firm sales | BSF $6.75–$420.25/mo + DNG ~$1.80/Dth (summer) + Commodity $4.11855/Dth (pass-through) | Small to mid-size commercial gas users |
| FS — Firm Sales | Bundled firm sales (block-tiered) | Block DNG + Commodity $4.11855/Dth; minimum monthly DNG charge | Large-volume firm commercial/industrial |
| IS — Interruptible | Interruptible sales | DNG ~$10.52→$0.68/Dth blocks + ~$4.106/Dth commodity; min yearly charge | Customers with alternate fuel / interruptible loads |
| TSS/TSM/TSL — Transportation | Transportation (customer-supplied gas) | DNG-based transportation rate per Dth + fixed charges | Large C&I procuring their own gas commodity |
Market Overview
Natural gas distribution by Questar Gas / Enbridge Gas Utah is fully regulated by the Public Service Commission of Utah (and the Idaho PUC and Wyoming PSC). Core sales-service customers do not shop for a competitive commodity supplier. Larger commercial and industrial customers may move from bundled sales service (GS/FS) to Transportation Service (TSS/TSM/TSL), arranging their own gas commodity supply while Enbridge transports it on the distribution system. The gas commodity is passed through at cost with no utility markup.
Need to pull your actual usage data to compare rates? See the Questar Gas Company (Enbridge Gas Utah) Data Access Guide →
Current Rate Schedules
Rates are set in the Enbridge Gas Utah Natural Gas Tariff (PSCU 8700). The Utah PSC approved a base rate filing effective January 1, 2026 raising base rates roughly 4.8% (about $2.67/month for a typical residential customer). Each bill combines a fixed Basic Service Fee, a volumetric Distribution Non-Gas (DNG) rate per Dekatherm, a Supplier Non-Gas rate, and a pass-through Commodity (gas cost) rate. Verified figures below are from the PSCU 8700 tariff sheets effective in early 2026; the commodity rate is passed through at cost with no markup.
Effective: January 1, 2026 · Full Tariff Book →
| Schedule | Type | Applicability | Structure | Rate |
|---|---|---|---|---|
| GS — General Service | commercial | Commercial and residential firm sales-service customers using gas for space/water heating, cooking, etc. | Monthly Basic Service Fee by meter category ($6.75 / $18.25 / $63.50 / $420.25). Volumetric Distribution Non-Gas (DNG) rate per Dth, tiered (first 45 Dth vs. all over 45 Dth) and seasonal (Summer Apr–Oct vs. Winter Nov–Mar): verified DNG approximately $1.80/Dth (summer, first 45) declining for higher usage, with higher winter rates. Plus Supplier Non-Gas and a pass-through Commodity rate of $4.11855/Dth. Verified total all-in rate roughly $6.81/Dth (summer, over 45 Dth) up to ~$8.70/Dth (summer, first 45 Dth). | — |
| FS — Firm Sales Service | industrial | Larger-volume commercial and industrial customers taking firm bundled gas sales service. | Block-tiered volumetric DNG (First 200 Dth / Next 1,800 Dth / All over 2,000 Dth) with seasonal summer/winter rates, plus Supplier Non-Gas and pass-through Commodity ($4.11855/Dth). Subject to a minimum monthly DNG charge. Basic Service Fee categories ($6.75–$420.25) apply but do not credit against the minimum. See PSCU 8700 §2.03 for exact block rates. | — |
| IS — Interruptible Sales Service | industrial | Commercial/industrial customers (annual contract) able to interrupt service; 15%+ load factor and minimum 7,000 Dth/year. | Block-tiered volumetric DNG (First 2,000 Dth / Next 18,000 Dth / All over 20,000 Dth): verified DNG approximately $10.52/Dth (first 2,000), $0.735/Dth (next 18,000), $0.678/Dth (over 20,000), plus Supplier Non-Gas (~$0.18/Dth) and pass-through Commodity (~$4.106/Dth). Subject to a minimum yearly charge (greater of $3,000 or load-factor formula) and interruption penalties. See PSCU 8700 §4.02. | — |
| TSS / TSM / TSL — Transportation Service (Small / Medium / Large) | industrial | Commercial and industrial customers who procure their own gas commodity and pay Enbridge only to transport it on the distribution system. | Firm and interruptible transportation options. Customer arranges its own gas supply; Enbridge charges DNG-based transportation rates (per Dth) plus applicable fixed charges. Existing customers must file notice of intent to switch to Transportation Service by March 7 for a July 1 effective date. See PSCU 8700 §5 for transportation rate tables. | — |
| TBF / MT — Transportation Bypass Firm / Municipal Transportation | industrial | Firm transportation for bypass-eligible large customers (TBF) and qualifying municipalities (MT). | Firm transportation service for qualifying customers under PSCU 8700 §5.02 (TBF) and §5.03 (MT). Customer supplies its own gas; Enbridge provides firm transportation at tariffed DNG-based rates. See PSCU 8700 §5. | — |
Rate Recommendations by Use Case
Mid-size commercial building
A typical commercial facility under ~45 Dth/month should remain on GS and focus on efficiency to manage the higher first-block DNG rate.
GS carries a modest Basic Service Fee and pass-through commodity; the first 45 Dth block carries the highest DNG, so usage reduction has outsized impact.
- Confirm meter category to verify the correct Basic Service Fee
- Track the 13-month usage history in the portal
- Prioritize winter usage reductions where DNG is highest
Large industrial gas user
High-volume facilities should compare bundled FS against Transportation Service with self-procured gas.
At high volumes, block DNG rates fall sharply and commodity procurement on the open market can beat bundled pricing; transportation lets the customer capture that margin.
- Model FS minimum monthly DNG charge against transportation rates
- File notice of intent to switch by March 7 for July 1 start
- Solicit competitive gas marketer quotes before switching
Dual-fuel / curtailable facility
Facilities able to interrupt gas or switch fuels should evaluate IS for lower upper-block delivery rates.
IS offers lower DNG in the large usage blocks in exchange for interruption obligations and a minimum yearly charge.
- Confirm 15%+ load factor and 7,000+ Dth/yr minimum
- Maintain reliable interruption/backup-fuel capability
- Model the minimum yearly charge against expected savings
Energy manager needing data feeds
Use Green Button Connect My Data or a written authorization to pull monthly DTH into energy management or ESG systems.
No interval data exists for gas, but monthly DTH via Green Button CMD or Nectar's API (docs.nectarclimate.com) supports benchmarking and reporting.
- Use an approved CMD provider for automated monthly pulls
- For one-off needs, file the Authorization to Release Information form
- Combine gas DTH with electric interval data for whole-building views
Historical Rate Trends
Base rates are reviewed and filed roughly every three years and are designed to recover the cost of delivering gas (the commodity itself is passed through at cost). The most recent base rate change took effect January 1, 2026.
January 1, 2026
Utah PSC approved Enbridge Gas base rate filing; typical residential bill up about $2.67/month (~$32/year). Driven by nearly $1 billion of infrastructure investment over three years.
+4.8%Overall trend: Gradually increasing delivery (base) rates driven by infrastructure investment; the commodity component fluctuates with market gas prices but is not marked up.
Next expected change: Next general base rate case expected on the typical ~3-year cycle (after the January 2026 change); periodic gas-cost (commodity) adjustments occur between cases.
Cost Optimization Strategies
Because the gas commodity is a pass-through, C&I cost savings come mainly from optimizing the delivery (DNG) component, choosing the right rate schedule, and managing seasonal and load-factor exposure.
Evaluate Transportation Service
For: Large commercial & industrial
Large customers can move from bundled GS/FS to TSS/TSM/TSL and procure gas directly from a marketer, paying Enbridge only DNG-based transportation. File notice of intent by March 7 for a July 1 start.
Consider interruptible service
For: Industrial customers with dual-fuel capability
Facilities with backup fuel or curtailable load may qualify for IS, which offers lower delivery rates in higher usage blocks in exchange for interruption obligations (7,000+ Dth/yr, 15%+ load factor).
Reduce winter peak usage
For: All commercial/industrial gas users
Winter DNG rates are materially higher than summer. Tightening building envelopes, tuning heating controls, and shifting flexible process loads cut the most expensive volumes.
Benchmark with interval-equivalent data
For: All C&I customers
Use the portal's 13-month history or Green Button CMD via a third party to benchmark monthly DTH, verify weather-normalized usage, and target efficiency projects.
To implement these strategies, you need your 15-minute interval data. Learn how to download Questar Gas Company (Enbridge Gas Utah) interval data →
Frequently Asked Questions
Does Enbridge Gas Utah offer interval (15-minute) data for commercial accounts?▾
No. Gas service uses monthly meter reads reported in Dekatherms (DTH). There is no 15/30-minute interval data; the portal shows 13 months of monthly usage and Green Button provides up to 24 months of monthly data in XML.
How can a third-party energy consultant get our gas usage data?▾
Two ways: (1) Green Button Connect My Data, where you authorize an approved provider via OAuth to receive ESPI v3.3 data automatically; or (2) the written Authorization to Release Information form, which directs Enbridge to send billing and meter-usage data directly to your designated third party for up to 3 years.
Can a large C&I customer choose its own gas supplier?▾
Core sales-service customers cannot shop, and the commodity is passed through at cost with no markup. However, large commercial/industrial customers can elect Transportation Service (TSS/TSM/TSL) and procure their own gas from a marketer, paying Enbridge only to transport it. Notice of intent is due by March 7 for a July 1 effective date.
What changed with rates in 2026?▾
Effective January 1, 2026, the Utah PSC approved a base rate increase of about 4.8% (roughly $2.67/month, or $32/year, for a typical residential customer). Base rates recover delivery infrastructure costs and are filed about every three years; the gas commodity itself is not marked up.
Is EDI billing available for business customers?▾
Yes, on a limited basis. Business customers can enroll in ANSI X12 EDI billing (810 invoices, plus 814/820/867 as applicable) by contacting the Enbridge EDI department at 1-800-323-5517 and completing the EDI Billing Customer Agreement, followed by test-invoice certification.
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