TNMP Electricity Service Area Guide

Texas-New Mexico Power, usually shortened to TNMP, is the regulated electricity delivery company for a patchwork of communities across Texas. It does not sell the competitive retail electricity plan at eligible addresses. Instead, TNMP operates the poles, wires, meters and local distribution equipment that move electricity from the grid to the service point.

That distinction is especially important with TNMP because its territory is not one continuous block. Official TNMP material describes four non-contiguous service areas covering communities in North, Central and West Texas plus Gulf Coast communities south of Houston. The company now serves only Texas and delivers electricity to more than 280,000 homes and businesses. For the statewide market framework before getting into TNMP territory, see Texas electricity rates and then return to the address-level utility question.

TNMP’s service territory is fragmented, so city names are not enough

Many electricity guides make utility territory sound simpler than it is. TNMP is a good example of why that can be misleading. Its official service-area page separates the footprint into North-Central Texas, Gulf Coast Texas and West Texas maps, while TNMP’s resiliency planning describes four non-contiguous areas. Those pieces contain small towns, rural service points, suburban communities and locations close to much larger metropolitan utility territories.

On the Gulf Coast, TNMP has identified communities including Texas City, Dickinson, League City, Friendswood, Alvin, La Marque, Angleton, Sweeny, West Columbia and Brazoria, among others. Even that list should not be read as “every address in each city is TNMP.” TNMP itself has published territory ZIP lists with the warning that some addresses in a listed ZIP may fall outside its service territory.

The same caution applies farther north. TNMP’s headquarters is in Lewisville, but a Lewisville or Denton County mailing address does not automatically prove TNMP delivery. Utility boundaries can split ZIP codes and sit next to Oncor or other systems. If an address is near a boundary, compare the service-point information rather than relying on the city name. The Texas plans by ZIP code guide shows how postal geography can narrow shopping results while still leaving the final TDU decision to the actual premises.

TNMP is the delivery utility; your REP sells the retail electricity plan

TNMP describes itself as the poles-and-wires-and-meters company. At a TNMP address where retail choice applies, the household selects a Retail Electric Provider (REP) for the commercial electricity agreement. The REP handles the electricity product, billing and most account questions. The local TNMP delivery assignment stays attached to the premises even when the household changes billing companies.

This is why changing electricity companies does not replace the local distribution network. A switch can change the energy price, contract term, renewable content, bill-credit structure or customer-service relationship, but it normally does not change the TNMP meter or the wires serving the premises. The same local network continues under TNMP’s regulated delivery tariff.

TNMP is also explicit that it is not a retail electric provider. A salesperson claiming to sell a TNMP electricity pricing plan should therefore be treated cautiously. If you are comparing retail products, use the plan documents from the REP and read the Electricity Facts Label before enrolling.

How to verify whether TNMP serves your exact address

The safest sequence is address first, utility second, retail plan third. Start with the full service address rather than a broad city label. If you already have an electric bill, the delivery utility and ESI ID are useful identifiers. The ESI ID belongs to the individual electric premise and is the market identifier used to associate that premise with the correct delivery utility.

For a new move, a REP’s enrollment system should resolve the service point before completing the order. If the address appears to sit on a utility boundary or the market lookup returns conflicting information, do not assume the nearest city determines the answer. Confirm the service point before comparing final prices because the applicable TDU charges depend on the delivery territory.

That matters around the Houston metro fringe as well. TNMP serves multiple Gulf Coast communities south of Houston, while CenterPoint Houston Electric operates a different delivery territory across much of Greater Houston. A regional label such as “Houston area” is therefore not specific enough. Where the address could be close to that boundary, compare the service-point result with the CenterPoint Houston electric service area guide.

Starting, stopping or moving service usually begins with the retail provider

TNMP tells customers who need to start, stop or move ordinary electric service to contact the retail provider, meaning the company that sends the bill. The REP submits the relevant market transaction, and TNMP performs whatever physical utility tasks the resulting market order requires at the meter or local network.

New construction is different. If a new building needs electric facilities, an addition increases load substantially or new equipment requires additional delivery capacity, TNMP may need to be involved directly. That can include engineering, metering or construction work before a REP can activate normal retail service. The important distinction is whether the request changes the retail account or changes the physical connection.

If you are simply changing the company that sells the retail plan at an already active TNMP address, the process is a competitive retail switch rather than a utility transfer. See how to switch electricity providers in Texas for the contract-side checks that belong in that decision.

Power outages and electric hazards belong with TNMP

A retail provider can answer contract and billing questions, but it does not dispatch crews to repair TNMP distribution equipment. TNMP runs the outage-reporting system and map and sends crews to restore faults on the distribution facilities it operates. Downed lines, damaged poles, transformer problems and neighborhood distribution outages therefore belong with the utility, not with whichever REP happens to bill the account.

The fragmented TNMP footprint creates unusually different outage risks. Gulf Coast communities can face hurricanes, tropical storms, flooding, lightning and high winds. West Texas portions of the territory can face very different conditions, including extreme heat, wind, wildfire exposure and winter-weather events. North and Central Texas locations have their own severe-weather patterns. TNMP’s approved resiliency work reflects these different geographic and climatic risks rather than treating the service territory as one uniform region.

For the Gulf Coast specifically, TNMP publishes storm-preparation information for communities such as Alvin, Angleton, Friendswood, League City and Texas City. Restoration estimates during major storms can remain regional until crews complete damage assessments. That is another reason to use the utility’s current outage tools rather than a retail-shopping site for real-time restoration information.

TNMP reads the meter; the REP uses that data to bill you

TNMP does not issue the monthly retail electricity bill, but it reads the meter and reports usage to the retail provider. TNMP customers with compatible smart meters can access detailed usage information through TNMP’s Data Viewer and Smart Meter Texas. TNMP has also described its advanced metering data as being measured in 15-minute increments.

That interval data is useful for more than checking a bill. It can show whether a home uses most electricity during hot afternoon cooling periods, overnight EV charging, weekends or other predictable windows. For time-of-use products, free-night offers or plans with usage thresholds, actual meter history is more informative than assuming a generic consumption pattern.

When comparing products, keep meter data and pricing rules together. A plan that looks inexpensive at exactly 1,000 kWh can behave very differently at 700, 1,300 or 2,000 kWh. A household with a seasonal Gulf Coast cooling load may also have a very different profile from a smaller home in another TNMP region.

TNMP delivery charges are regulated, not a retail shopping choice

TNMP’s transmission and distribution charges are governed through its regulated tariff and PUCT proceedings. Those delivery charges are separate from the competitive retail offer even when the REP combines everything on one monthly bill. A customer cannot avoid the applicable TNMP delivery component merely by selecting a different REP at the same TNMP service point.

This is one reason a plan should be compared on its all-in bill mechanics rather than on one advertised energy number. Review whether the quoted average price includes recurring TDU delivery charges, whether the retail product adds a base charge, and whether credits apply only inside a narrow usage band. Current tariffs can change over time, so copying an old TNMP delivery rate from an outdated comparison page is not a reliable way to estimate a future bill.

For shoppers who value price stability, the Texas fixed-rate electricity plan guide explains what “fixed” does and does not protect against. A fixed retail energy price does not mean every line item on the final bill is frozen for the entire contract term.

How to compare electricity plans at a TNMP address

Begin by confirming that the address is actually in TNMP territory. Next collect recent monthly kWh figures or smart-meter history. Filter the retail market to plans available at that service point, then compare each plan at the household’s realistic usage rather than at one marketing benchmark.

Read the EFL and contract terms for energy pricing, recurring fees, credits, delivery-charge treatment, renewable content, contract length and early termination conditions. If a product depends on when electricity is used, use interval data rather than guessing. If the household may move, weigh contract flexibility against the benefit of a longer fixed term.

Finally, keep responsibilities separate. Contact the REP for retail enrollment, contract questions and the bill. Contact TNMP for delivery outages, damaged utility equipment and delivery-side work. That simple division prevents a common source of confusion in a service territory whose geography is already more complicated than most.

Frequently asked questions about TNMP