Modesto Irrigation District (MID) Rate Selection Guide
Modesto Irrigation District (MID) is a publicly owned electric utility serving ~133,517 electric customers across 560 square miles of California's Central Valley. MID runs an Oracle-based customer information system with a self-service portal and partial AMI deployment, but offers no Green Button, EDI, or public API — data access for C&I customers is form-based and staff-mediated.
Modesto Irrigation District (MID) Rate Schedule Comparison
| Schedule | Type | Rate | Best For |
|---|---|---|---|
| GS-1 Non-Demand | Commercial | Customer charge + energy ($/kWh); + CIA $0.0028, EEA $0.0120, PCA (varies) | Small businesses with modest, steady load and no demand spikes |
| GS-2 Demand | Commercial | Customer charge + demand ($/kW) + energy ($/kWh); + system riders | Mid-size commercial with measurable peak demand |
| GS-TOU | Commercial | Demand + time-differentiated energy; + system riders | Commercial loads that can shift use to off-peak |
| GS-3 Industrial | Industrial | Customer + demand ($/kW) + TOU energy; + system riders | Large industrial facilities |
| IC-25 / GS-PAC | Industrial / Public | Negotiated contract rate | Very large or public-agency loads |
Market Overview
MID is a political subdivision of California and the exclusive electric provider in its 560-square-mile territory. Rates and tariffs are adopted by the MID Board of Directors and filed with the Board Secretary; the CPUC has only limited jurisdiction over publicly owned utilities. Customers cannot choose a competitive supplier, and there is no CCA option.
Need to pull your actual usage data to compare rates? See the Modesto Irrigation District (MID) Data Access Guide →
Current Rate Schedules
MID's electric tariffs are effective January 1, 2025 (with several C&I schedules reissued May 1, 2025). Business schedules include GS-1 (General Service Non-Demand), GS-2 (General Service Demand), GS-TOU (Commercial Time-of-Use), GS-3 (General Service Industrial), and the IC-25 industrial contract for 25 MW minimum-demand loads. All kWh are subject to system-wide riders: the Capital Infrastructure Adjustment (CIA) at $0.0028/kWh, the Environmental Energy Adjustment (EEA) at $0.0120/kWh, and a monthly Power Cost Adjustment (PCA) that varies (e.g. $0.01300/kWh in March 2026; $0.00000 through most of 2025). Per-kWh and per-kW energy/demand charges are published in the individual schedule PDFs; exact figures should be read from the current tariff PDFs.
Effective: January 1, 2025 · Full Tariff Book →
| Schedule | Type | Applicability | Structure | Rate |
|---|---|---|---|---|
| GS-1 General Service - Non-Demand | commercial | Small commercial accounts without a measured demand component. | Monthly customer charge plus per-kWh energy charge; subject to CIA, EEA, and monthly PCA riders. See tariff PDF for current $ values. | — |
| GS-2 General Service - Demand | commercial | Medium commercial accounts with a measured demand (kW) component. | Customer charge + per-kW demand charge + per-kWh energy charge; subject to CIA, EEA, and PCA riders. Reissued effective May 1, 2025. See tariff PDF. | — |
| GS-TOU General Service - Commercial Time-of-Use | commercial | Commercial accounts electing time-of-use pricing. | Customer + demand charges plus time-differentiated peak/off-peak energy rates; subject to system riders. Reissued May 1, 2025. See tariff PDF. | — |
| GS-3 General Service - Industrial | industrial | Large industrial accounts. | Customer + demand (kW) + energy (kWh) charges, typically with TOU components; subject to CIA, EEA, PCA. Reissued May 1, 2025. See tariff PDF. | — |
| IC-25 Industrial Contract (25 MW Minimum Demand) | industrial | Very large industrial loads under contract with a 25 MW minimum demand (2005-2012 vintage). | Negotiated contract rate with demand and energy provisions. See tariff PDF. | — |
| GS-PAC Public Agency Contract Rate | commercial | Qualifying public-agency accounts under contract. | Contract rate; an Economic Development Discount Provision and Interruptible Demand Option are available. See tariff PDF. | — |
Rate Recommendations by Use Case
Mid-size commercial facility with peak demand
GS-2 (or GS-TOU) is the typical fit; the kW demand charge dominates the bill.
Demand-metered schedules let MID recover capacity costs via a per-kW charge, so controlling coincident peaks moves the bill more than kWh reduction alone.
- Pull a benchmarking data release to map your load shape
- Identify and stagger the equipment driving monthly peaks
- Model GS-TOU if you can shift load off-peak
Large industrial plant
GS-3 (industrial) or, for very large loads, the IC-25 contract rate.
Industrial schedules combine demand and TOU energy charges; the largest loads (25 MW+) can qualify for negotiated contract pricing.
- Treat the monthly PCA as a variable budget line
- Negotiate IC-25 / GS-PAC terms if eligible
- Pursue interruptible-demand options to lower demand exposure
Multi-site portfolio manager / consultant
Use Guest User access plus benchmarking releases to assemble portfolio data; expect manual per-account workflows.
MID has no API, EDI, or Share My Data program, so portfolio data must be gathered account-by-account via the portal or release forms.
- Pre-stage signed Release of Information forms per site
- Request 12-month profiles in batches to energybenchmarking@mid.org
- Build a tracker for the 5-10 business day turnaround
Small business with steady, modest load
GS-1 Non-Demand avoids demand charges for small accounts.
Without a measured demand component, small steady loads are billed on customer + energy charges plus riders, which is simpler and usually cheaper than demand schedules.
- Confirm you stay below the demand threshold for GS-1
- Watch the monthly PCA on your bill
- Use free home/business saving tips and audits
Historical Rate Trends
The MID Board approved a two-year rate package: 7.5% effective in 2024 and 5.5% effective January 1, 2025, across rate classes. A monthly Power Cost Adjustment began appearing on bills in March 2025 to recover fluctuating power-supply costs.
January 1, 2024
Board-approved general electric rate increase across rate classes.
+7.5%January 1, 2025
Second-year board-approved electric rate increase across rate classes.
+5.5%March 1, 2025
Power Cost Adjustment (PCA) begins appearing on bills; recalculated monthly (e.g. reached $0.01300/kWh by March 2026).
variableOverall trend: Rising — successive board-approved increases plus a newly active variable PCA.
Next expected change: PCA recalculated monthly; further base-rate changes are set annually by the MID Board.
Cost Optimization Strategies
Because MID C&I bills are driven by demand (kW) charges and a variable PCA, the biggest levers are peak-demand management and load shifting, supported by MID's free benchmarking data and business rebates.
Demand (kW) management
For: GS-2, GS-TOU, GS-3 demand-metered accounts
Stagger equipment startups and shave coincident peaks on GS-2/GS-3 to reduce the per-kW demand charge, which is often the largest controllable bill component.
Time-of-use load shifting
For: GS-TOU and GS-3 accounts
Move discretionary load to off-peak periods under GS-TOU or GS-3 TOU energy pricing.
Benchmark with MID's free data release
For: All C&I customers
Use the Energy Benchmarking 12-month profile to feed ENERGY STAR Portfolio Manager and target efficiency projects.
Capture business rebates
For: Commercial and industrial accounts
Apply for MID Business Rebates / Power Smart incentives to offset efficiency upgrades that lower kWh and kW.
To implement these strategies, you need your 15-minute interval data. Learn how to download Modesto Irrigation District (MID) interval data →
Frequently Asked Questions
How does a C&I customer at MID get 15-minute interval data?▾
MID collects 15-minute data in its Oracle MDMS for AMI-equipped accounts, but does not expose it via Green Button or an API. The portal shows hourly/daily. For structured 15-minute or demand/load-profile extracts, submit the Energy Benchmarking Non-Aggregate Data Release form to energybenchmarking@mid.org, or call Energy Services at (209) 526-7339 for a custom extract (CSV/Excel, sometimes quoted).
Does MID support Green Button or an automated data API?▾
No. MID's Oracle platform is capable of Green Button/ESPI, but neither Download My Data nor Connect My Data is activated, and there is no public developer API. Automated access today relies on Guest User portal sharing or form-based releases.
Can an energy consultant or aggregator pull a client's MID data?▾
Yes, two ways: (1) the customer grants Guest User read-only portal access, or (2) the customer signs a Release of Information form authorizing MID to send a 12-month profile to the third party. There is no formal aggregator/Share My Data program, so plan for manual, per-account workflows.
Does MID offer EDI for commercial customers?▾
No. EDI is used in deregulated retail markets; MID is a publicly owned utility in a non-shopping market and does not run an EDI program. High-volume customers can ask Commercial Services about custom file-based exchange (e.g. SFTP).
How current is the data and how far back does it go?▾
Portal data updates daily and shows the current month plus the prior 13 months; MDMS retains multiple years of interval data and 7+ years of billing history. Formal releases typically cover a 12-month window.
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