Niagara Mohawk Power Corporation d/b/a National Grid (NY) Rate Selection Guide
National Grid's New York utility (Niagara Mohawk) serves ~1.7M electric and ~600K gas customers across Upstate NY. It is a leader in data access: a Green Button Connect My Data program on the UtilityAPI platform (OAuth, 15-minute interval data), 24-month billing/usage exports, mature ANSI X12 EDI for ESCOs/DERS, and a NY System Data Portal for DER hosting capacity.
Niagara Mohawk Power Corporation d/b/a National Grid (NY) Rate Schedule Comparison
| Schedule | Type | Rate | Best For |
|---|---|---|---|
| Electric SC-2 | Customer + delivery (demand optional) | Customer charge + per-kWh delivery; demand pricing (SC-2D) above 2,000 kWh/4-mo threshold | Small commercial/industrial under 100 kW |
| Electric SC-3 | Demand-based, by voltage | Distribution customer charge $870.00/mo (secondary) + per-kW demand + delivery (eff 09-01-2025) | Demand-metered C&I over 100 kW |
| Electric SC-3A | Demand-based, large/primary | Customer charge $4,150 / $5,100 / $10,350 per mo by voltage + per-kW demand (eff 09-01-2025) | Large industrial over 2,000 kW |
| Gas SC-2 | Volumetric per-therm | Monthly delivery charge + per-therm delivery (PSC No. 219); supply at market price | Small general commercial/industrial gas |
| Gas SC-5/6/7/8 | Volumetric / interruptible / transportation | Per-therm delivery by class & volume tier (PSC No. 219) | Large firm, interruptible, or transportation gas loads |
Market Overview
NY retail access: customers may choose an ESCO for electric/gas supply while National Grid (Niagara Mohawk) provides regulated delivery. ESCOs and DER suppliers must be PSC-approved and exchange data via EDI; third parties can also use Green Button Connect.
Need to pull your actual usage data to compare rates? See the Niagara Mohawk Power Corporation d/b/a National Grid (NY) Data Access Guide →
Community Choice Aggregation (CCA) Options
NY municipalities can aggregate residents/businesses to procure supply; delivery remains with National Grid.
Current Rate Schedules
National Grid in Upstate NY is Niagara Mohawk Power Corporation (NMPC), which delivers both electricity (Electric Tariff PSC No. 220) and natural gas (Gas Tariff PSC No. 219) under classifications set by the NY Public Service Commission. Commercial electric customers are classified by monthly demand: SC-2 (general small C&I, demand under 100 kW, available on non-demand or demand pricing), SC-3 (demand-metered C&I exceeding 100 kW for 12 consecutive months), and SC-3A (large/primary, demand over 2,000 kW). Electric SC-7 is Standby Service for customers with on-site generation. Commercial gas customers take SC-2 (small general), with larger firm/interruptible/transportation classes (SC-5, SC-6, SC-7, SC-8) by annual therm volume. Delivery charges below come from the National Grid Upstate NY Business Service Rates page; charges reflect the multi-year rate plan approved by the PSC effective September 1, 2025. Supply/commodity is billed separately (utility market-price supply or an ESCO).
Effective: September 1, 2025 · Full Tariff Book →
| Schedule | Type | Applicability | Structure | Rate |
|---|---|---|---|---|
| SC-2 — Small Commercial/Industrial Electric | Commercial (small electric) | Commercial or industrial customers whose monthly measured demand is less than 100 kW. A business using more than 2,000 kWh in each month for four consecutive months is reclassified to demand pricing. | Monthly customer charge plus delivery (and, on demand schedules, a demand charge); available under non-demand or demand pricing schedules (e.g., SC-2D). Supply billed separately at utility market price or via an ESCO. | Customer charge plus per-kWh delivery; demand customers add a per-kW charge. Specific $ values published in the Service Rates tables / PSC No. 220 tariff (varies by demand vs non-demand). Structure-verified; consult tariff for exact per-unit charges.+ Optional/triggered — applies under the demand pricing schedule (SC-2D) once the 2,000 kWh/4-month threshold is met. |
| SC-3 — Demand-Metered Commercial/Industrial Electric | Commercial/Industrial (medium-large electric) | Commercial or industrial customers whose monthly measured demand exceeds 100 kW in each of the previous 12 consecutive months. Priced by delivery voltage (secondary up to 2.2 kV, primary, etc.). | Monthly distribution customer charge + distribution demand charge ($/kW) + per-kWh delivery, differentiated by service voltage. Demand-driven — the demand charge is the dominant component. Supply billed separately. | Distribution Delivery Customer Charge $870.00/mo (secondary, eff 09-01-2025) plus distribution demand and delivery charges per the Service Rates table / PSC No. 220 tariff.+ Yes — distribution delivery demand charge per kW (value in the Service Rates table); primary applies to >100 kW demand-metered service. |
| SC-3A — Large/Primary Industrial Electric | Industrial (large/primary electric) | Large customers whose monthly demand has exceeded 2,000 kW (in two consecutive months for pre-9/1/1998 customers, or six consecutive months for those after), served at secondary, primary, or sub-transmission/transmission voltage. | Distribution customer charge + distribution demand charge ($/kW) + delivery, scaled by voltage level; the largest customers taking higher-voltage service receive lower per-unit distribution charges in exchange for higher fixed customer charges. Supply billed separately. | Distribution Delivery Customer Charges by voltage: $4,150.00/mo (secondary), $5,100.00/mo, and $10,350.00/mo at higher voltages (eff 09-01-2025), plus per-kW demand and delivery charges per PSC No. 220.+ Yes — distribution delivery demand charge per kW; primary driver of large-customer bills. |
| Electric SC-7 — Standby Service | Commercial/Industrial (standby, on-site generation) | Customers with on-site generation installed at their site (effective 7/1/2002), including certain Value Stack / Rule 40.2 customers. Customers electing SC-7 must remain on it for a minimum of one year. | Standby rate replacing standard demand charges with contract-demand and as-used demand charges designed to recover the cost of backup capacity for self-generating customers. | Contract-demand and daily as-used demand charges per PSC No. 220; structure-only here.+ Yes — contract demand + as-used (standby) demand charges. |
| Gas SC-2 — Small General Natural Gas Service | Commercial (small gas) | Small general commercial/industrial gas service customers. Available on standard (utility market-price supply) or transportation pricing. | Monthly delivery service (customer) charge plus per-therm delivery charge; gas supply billed at the monthly market price or via an ESCO. Delivery charges set in Gas Tariff PSC No. 219. | Per-therm delivery and monthly delivery charge published in the SC-2 Delivery Service Pricing table / PSC No. 219; supply at the published Natural Gas Monthly Rate. Structure-verified.+ None — volumetric (per-therm) delivery. |
| Gas SC-5 / SC-6 / SC-7 / SC-8 — Large & Transportation Gas | Commercial/Industrial (large gas, firm/interruptible/transportation) | Larger gas customers by annual therm volume: Firm SC-5 (250,000–1,000,000 therms/yr), Interruptible SC-6 (up to ~2,500,000 therms/yr), Small-Volume Transportation SC-7 (~50,000 therms/yr), Large-Volume SC-8 (≥1,000,000 therms/yr). | Monthly delivery/customer charge plus per-therm delivery charges (firm) or interruptible/transportation delivery charges; transportation classes let the customer source gas from a marketer while National Grid delivers. Charges in Gas Tariff PSC No. 219. | Per-therm delivery and customer charges set in PSC No. 219 by class and volume tier; structure-only here.+ Volumetric per-therm; interruptible classes priced for curtailable load. |
Rate Recommendations by Use Case
Demand-metered C&I facility
Use 15-minute interval data to manage demand charges and choose the best supply option.
AMI 15-minute data via Green Button or EDI 867HIU exposes peak demand drivers; ESCO shopping can cut commodity cost.
- Pull interval data via Green Button Connect or EPO
- Target peak kW reduction to lower demand charges
- Compare ESCO offers vs. default supply
Multi-site portfolio / benchmarking
Automate whole-building data for ENERGY STAR benchmarking and reporting.
EPA Portfolio Manager integration plus 24-month exports streamline benchmarking across sites.
- Submit Energy Usage Release Forms per building
- Use Green Button Connect for automated feeds
Energy software / aggregator
Integrate via Green Button Connect (UtilityAPI) for scalable OAuth data access.
National Grid NY is Green Button-certified on UtilityAPI; OAuth yields 15-minute interval + billing data without manual sharing.
- Register and complete sandbox certification
- Use UtilityAPI NGNY endpoints
- Or use Nectar's API — see docs.nectarclimate.com
ESCO / retail supplier
Use EDI for enrollment and bulk consumption/interval data.
Mature ANSI X12 EDI (814/867) supports enrollment and 24-month consumption plus interval usage for billing/forecasting.
- Obtain PSC approval and NYISO acceptance (electric)
- Complete Phase II/III EDI certification
- Maintain Data Security Agreement
Historical Rate Trends
Niagara Mohawk (National Grid Upstate NY) delivery rates are set through multi-year rate plans approved by the NY Public Service Commission. The current three-year electric and gas delivery rate plan was approved August 14, 2025, effective for service beginning September 1, 2025.
September 1, 2025
NY PSC approved (Aug 14, 2025) a three-year delivery rate plan. Year-1 levelized increases: electric +3.4% (~$167.3M) and gas +5.5% (~$57.4M). The PSC cut the company's electric request by over $340M (~67%) and gas by nearly $100M (~63%) versus what was filed.
Electric +3.4% (~$167.3M); Gas +5.5% (~$57.4M) year 1September 1, 2026
Year-2 levelized increases under the approved plan: electric +5.6% (~$297.4M) and gas +5.5% (~$64.5M).
Electric +5.6%; Gas +5.5%September 1, 2027
Year-3 levelized increases under the approved plan: electric +4.6% (~$243.4M) and gas +6.0% (~$71.8M).
Electric +4.6%; Gas +6.0%Overall trend: Rising — a three-year plan (effective 9/1/2025) layers in successive levelized delivery-revenue increases for both electric and gas, with the largest electric step in year two.
Next expected change: Scheduled rate-year steps under the current plan: electric +5.6% (yr2, ~9/1/2026) and +4.6% (yr3, ~9/1/2027); gas +5.5% (yr2) and +6.0% (yr3). A new rate case would follow the three-year term (~2028).
Cost Optimization Strategies
Because National Grid Upstate NY bills unbundle delivery (regulated, voltage- and demand-driven) from supply (market or ESCO), the main C&I savings levers are correct service-classification placement, demand and voltage management on the electric side, supply procurement, and interruptible/transportation options on the gas side.
Manage peak demand (SC-3 / SC-3A)
For: Electric SC-3, SC-3A (and SC-2 on demand pricing)
Distribution demand charges and high fixed customer charges dominate large-customer bills. Reducing monthly peak kW — through load scheduling, peak shaving, or storage — directly lowers the demand component.
Optimize service voltage
For: Electric SC-3, SC-3A
Taking service at primary or higher voltage (where feasible) can lower per-kW distribution charges for large SC-3A customers, trading a higher fixed customer charge for reduced volumetric/demand charges.
Verify correct service classification
For: Electric SC-2/3/3A; Gas SC-2/5/6/7/8
Confirm placement against demand/usage thresholds (100 kW, 2,000 kW; 2,000 kWh/4-month rule for SC-2). Avoid being pushed onto demand pricing unnecessarily, and confirm gas class matches annual therm volume.
Competitive supply (ESCO) & interruptible/transportation gas
For: Electric SC-2/3/3A; Gas SC-5/6/7/8
Procure electric or gas supply from a competitive ESCO, and for large/flexible gas loads consider interruptible (SC-6) or transportation (SC-7) service to lower delivery cost where load can be curtailed or self-supplied.
To implement these strategies, you need your 15-minute interval data. Learn how to download Niagara Mohawk Power Corporation d/b/a National Grid (NY) interval data →
Frequently Asked Questions
Does National Grid NY support Green Button?▾
Yes. National Grid NY offers Green Button Download My Data (CSV/XML) for customers and Green Button Connect My Data (OAuth) for third parties on the UtilityAPI platform (utility ID NGNY). It was the first IOU-level Green Button-certified utility.
How granular is the interval data?▾
AMI provides 15-minute electric interval data with roughly 13 months of history. Gas modules add gas interval/consumption data. Access is via Green Button download, GBCMD OAuth, EDI 867HIU/867MIU, or Energy Profiler Online.
Can a C&I customer choose its electricity supplier?▾
Yes. New York is deregulated: customers can choose an ESCO for supply while National Grid (Niagara Mohawk) provides regulated delivery. ESCOs must be PSC-approved and exchange data via ANSI X12 EDI.
How do third parties get automated data access?▾
Register for Green Button Connect, complete sandbox certification, then obtain customer OAuth authorization to pull 15-minute interval and billing data via UtilityAPI. ESCOs/DER suppliers can alternatively use EDI 814/867 transactions.
What is the NY System Data Portal?▾
An ArcGIS REST-based portal exposing distribution feeder/substation data and DER hosting capacity for developers, useful for siting solar, storage, and EV projects.
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