New Mexico Gas Company Rate Selection Guide
New Mexico Gas Company (NMGC) is the state's largest natural-gas distribution utility, serving about 556,000 customers across 27 counties. C&I customers access billing and monthly usage data through the Manage My Account portal, the Vista gas-measurement portal, and the Customer Activity Web (CAW) transportation platform; NMGC does not offer Green Button, ESPI, or a public API.
New Mexico Gas Company Rate Schedule Comparison
| Schedule | Type | Rate | Best For |
|---|---|---|---|
| Rate 54 - Small Volume General Service | commercial | Fixed access fee + higher per-therm distribution charge (see tariff) | Small commercial customers with low gas volume |
| Rate 56 - Medium Volume General Service | commercial | Higher access fee + lower per-therm charge (see tariff) | Mid-size C&I with moderate volume |
| Rate 58 - Large Volume General Service | industrial | Large access fee + lowest per-therm charge (see tariff) | Large C&I with high annual volume |
| Rate 70 - Transportation Service | industrial | Delivery-only charges; customer buys own gas (see tariff) | Large customers wanting to procure their own gas supply |
Market Overview
NMGC is a regulated gas distribution utility under NMPRC jurisdiction. Base distribution rates are set by rate case; the gas commodity is passed through via the Cost of Gas Component rider. Large-volume customers can elect Transportation Service and buy gas from a competitive marketer, with NMGC providing delivery under its open-access program (NMPRC Rule 660).
Need to pull your actual usage data to compare rates? See the New Mexico Gas Company Data Access Guide →
Current Rate Schedules
NMGC C&I customers are served under volume-based General Service schedules - Small Volume (Rate 54), Medium Volume (Rate 56), and Large Volume (Rate 58) - plus Transportation Service (Rate 70) for customers who procure their own gas. Each schedule combines a fixed monthly access fee with a per-therm distribution/transmission charge that declines with volume; the gas commodity itself is billed separately through the Cost of Gas Component rider (Rate Rider No. 4), with additional weather-normalization (No. 8) and energy-efficiency (No. 15) riders. Specific dollar figures are set by NMPRC rate case and published in the linked tariff sheets; rates were last reset in NMGC's rate case approved July 26, 2024. We describe the structure here and link the tariff book rather than restate per-therm dollar amounts that change with each rider update.
Effective: July 26, 2024 · Full Tariff Book →
| Schedule | Type | Applicability | Structure | Rate |
|---|---|---|---|---|
| Rate 54 - Small Volume General Service | commercial | Small commercial and business customers with relatively low annual gas volumes. | Fixed monthly access fee plus a per-therm distribution charge; the gas commodity is passed through separately via the Cost of Gas Component rider. See Tariff Rate No. 54 for current per-therm and access-fee figures. | — |
| Rate 56 - Medium Volume General Service | commercial | Mid-size commercial and industrial customers with moderate annual gas volumes. | Higher fixed monthly access fee with a lower per-therm distribution charge than Small Volume, reflecting declining-block volume pricing; commodity passed through via the Cost of Gas rider. See Tariff Rate No. 56 for current figures. | — |
| Rate 58 - Large Volume General Service | industrial | Large commercial and industrial customers with high annual gas volumes; tiered transmission vs distribution service. | Substantial fixed monthly access fee with the lowest per-therm distribution/transmission charges of the General Service schedules; separate per-therm rates apply for transmission-served vs distribution-served gas. Commodity passed through via the Cost of Gas rider. See Tariff Rate No. 58 for current figures. | — |
| Rate 70 - Transportation Service | industrial | C&I customers who procure their own gas supply from a third-party marketer and use NMGC only for delivery (open-access transportation under NMPRC Rule 660). | Delivery-only charges (no commodity component): a fixed monthly fee plus per-therm transportation/delivery charges, with balancing and exit-fee provisions. Nominations and scheduling are managed through the Customer Activity Web. See Tariff Rate No. 70. | — |
| Rate 35 - Cogeneration Service | industrial | Industrial customers operating cogeneration facilities. | Specialized industrial service with its own access and per-therm charges; commodity passed through where applicable. See Tariff Rate No. 35. | — |
Rate Recommendations by Use Case
Small commercial facility (restaurant, small office, retail)
Small-volume commercial customers are served under Rate 54.
Rate 54 carries the lowest fixed access fee, which suits low-volume sites where a high per-therm charge is still cheaper overall than a larger fixed fee.
- Track monthly therms in Manage My Account
- Apply for commercial efficiency rebates
- Verify you are on the lowest-cost volume schedule annually
Mid-size commercial / light industrial
Mid-volume C&I customers should evaluate Rate 56.
Medium Volume trades a higher fixed fee for a lower per-therm charge; at moderate volumes this typically beats Rate 54 on total cost.
- Compare annual total cost of Rate 54 vs 56 at your volume
- Request a Vista portal account for detailed usage reporting
- Use the Weather Normalization rider to anticipate seasonal bill swings
Large industrial / high-volume plant
High-volume industrial customers should consider Rate 58 and weigh Transportation Service.
Large Volume offers the lowest per-therm distribution charges; very large users with supply expertise can often lower commodity cost by switching to Transportation Service and buying gas from a marketer.
- Model Rate 58 bundled vs Rate 70 transportation including marketer supply
- Set up Customer Activity Web (CAW) access for nominations
- Maintain balancing to avoid imbalance/exit fees
Multi-site portfolio / facility management
Organizations with many NMGC accounts should centralize billing and reporting.
Summary Billing plus the Vista portal give facility managers consolidated statements and detailed measurement reporting across sites, since NMGC offers no API or Green Button for automated aggregation.
- Enroll in Summary Billing (Summary.Billing@nmgco.com)
- Request Vista accounts for each measurement point
- Plan for manual data export since there is no public API
Historical Rate Trends
NMGC's base distribution rates are reset periodically through NMPRC rate cases; the gas commodity component (Rate Rider No. 4) and weather-normalization rider (No. 8) adjust more frequently to track wholesale gas prices and weather. The most recent base-rate reset was the rate case approved July 26, 2024.
July 26, 2024
NMPRC approved NMGC's rate case, resetting base distribution rates across customer classes including the General Service volume schedules.
September 25, 2025
Weather Normalization Adjustment Mechanism (Rate Rider No. 8) updated effective September 25, 2025.
Overall trend: Rising base rates with volatile commodity pass-through. NMGC has pursued base-rate increases to recover pipeline-system investment, while the cost-of-gas component fluctuates with the natural-gas market.
Next expected change: Subject to future NMPRC rate cases and periodic Cost of Gas Component and weather-normalization rider updates.
Cost Optimization Strategies
Because the gas commodity is a pass-through, controllable savings for NMGC C&I customers come from selecting the right volume schedule, reducing consumption through efficiency, and - for large users - evaluating Transportation Service to procure gas competitively.
Match the right volume schedule
For: C&I on General Service (Rate 54/56/58)
General Service rates are declining-block: Medium and Large Volume schedules trade a higher fixed access fee for lower per-therm charges. High-volume sites should confirm they are on the schedule that minimizes total cost at their consumption level.
Evaluate Transportation Service
For: Large-volume industrial / C&I
Large customers can elect Rate 70 Transportation Service and buy gas directly from a marketer, paying NMGC only for delivery. This can beat the bundled Cost of Gas Component for customers with the volume and expertise to manage supply.
Reduce consumption via efficiency programs
For: All C&I
NMGC's commercial energy-efficiency programs (audits, steam-trap surveys, incentives) cut therms used, directly lowering both distribution and commodity charges.
Consolidate multi-site billing
For: Multi-location businesses
Summary Billing consolidates many location accounts into one statement, improving visibility and reducing administrative cost for facility managers (no direct rate savings but better cost management).
To implement these strategies, you need your 15-minute interval data. Learn how to download New Mexico Gas Company interval data →
Frequently Asked Questions
Can a third party get automated access to our NMGC gas data?▾
Not via a standardized API. NMGC does not offer Green Button, ESPI, or a public API. C&I customers and authorized shippers can request access to the Vista gas-measurement portal for meter readings and usage reports, and transportation customers use the Customer Activity Web (CAW). Otherwise, data must be downloaded from Manage My Account and shared manually.
Does NMGC provide interval (sub-daily) gas usage data?▾
No. NMGC's Automated Meter Reading (AMR) meters support monthly billing reads only. There is no 15-minute, 30-minute, or hourly interval data. C&I customers see monthly consumption in therms and CCF; transportation customers can view up to 36 months of monthly usage history in CAW.
How does a multi-site business consolidate NMGC accounts?▾
Enroll in Summary Billing (free) by submitting the application to Summary.Billing@nmgco.com. It consolidates multiple location accounts into a single statement with one due date, simplifying billing visibility for facility managers. For detailed measurement reporting, also request a Vista portal account.
What rate schedules apply to commercial and industrial gas customers?▾
C&I customers are typically served under the volume-based General Service schedules - Small Volume (Rate 54), Medium Volume (Rate 56), and Large Volume (Rate 58) - or, for customers procuring their own gas, Transportation Service (Rate 70). All schedules and rate riders are published in NMGC's tariff book on its Rates page.
Is NMGC's commodity (cost-of-gas) charge part of the base rate?▾
No. The cost of the gas commodity is passed through separately via Rate Rider No. 4 (Cost of Gas Component) and trues up over time, so it is not part of NMGC's base distribution margin. A Weather Normalization Adjustment (Rider No. 8) and Energy Efficiency rider (No. 15) also apply.
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