What genuinely varies by region, and what a calculator cannot regionalize honestly

The one figure this site can regionalize honestly

The U.S. Energy Information Administration publishes 18.44 cents per kilowatt-hour as the national residential average for the period this site last checked — already cited, with its quote, on the operating-cost page. EIA also publishes the same series broken out by state, and residential rates genuinely differ from state to state. Rather than assert a specific state's number without a verified quote to stand behind it, the table below runs that page's own default household across a spread of scenario rates, low to high, so you can find where your own utility bill lands and read the annual cost straight off the row nearest it — the scenario rates themselves are illustrative brackets, not sourced figures:

Notice how little the total moves. Even the top and bottom rows of that table — a four-fold spread in the price of electricity — differ by $28.93 a year. This is the same finding the operating-cost page makes about horsepower: electricity is a real, sourced, regionally variable number, and it is still not where the money in this project is.

Where the real regional swing lives

Installed price is dominated by labor, and skilled-trade labor is priced locally. The gap between a low-cost labor market and a high-cost metro for the same scope of plumbing and electrical work is not a rounding error, and it is the reason two houses with identical basins, identical discharge runs, and identical scope-tool results can still get genuinely different quotes. Price drivers names this directly; this site does not publish a labor-rate table because doing so honestly requires a verified quote from that series, which is not yet on file — see the sources and update log for the specific data series flagged as an open item.

Climate changes the scope, not just the comfort

Freeze exposure is not a preference input, it is a scope input: install scope treats a freezing climate as a reason to require freeze-protected discharge detailing, and discharge routing covers why a frozen termination is the single most common way a working system fails at the worst possible moment. A warm-climate house and a cold-climate house with otherwise identical basins do not carry the same required-line list, and that difference is regional in the most literal sense — it is set by where the house is.

Permit and inspection regimes are set locally, on purpose

Discharge routing and electrical and permits both decline to publish a national answer about what is permitted, because there is not one. Whether a storm-system connection is allowed, whether a permit is required for a new dedicated circuit, and how strictly an inspector checks any of it are jurisdiction decisions, and the honest move is the one those pages already make: name the exact questions to ask, rather than guess at an answer that would be wrong for most readers.

Soil and water table are already regional inputs, inside the tools

How much rain actually reaches your footing drain, and how fast, depends on soil and water table conditions that are genuinely local. This site does not model that with a lookup table by ZIP code; it asks you to measure it directly with the pit inflow test, which turns your own basin into the regional instrument. That measurement already carries whatever your local ground is doing — it does not need a separate regional adjustment layered on top of it.

Using this page with your own bill

Open a recent electric bill and find the per-kilowatt-hour rate, not the total dollar amount owed — the total includes fixed charges and usage well beyond one pump. Some utilities bill in tiers, where the rate itself rises after a threshold of monthly usage; if yours does, use the marginal rate for the tier your household typically sits in, since that is the rate an additional appliance actually costs you at. Time-of-use tariffs complicate this further — a pump that runs mostly during storms is not selectively running during your utility's peak-price window, so a flat average across your bill is usually close enough for planning purposes even under a time-of-use plan.

Once you have that number, plug it into the operating-cost tool directly rather than trying to interpolate between the rows of the table above — the table exists to show how little the total moves across a wide spread, not to substitute for your own figure in a real decision.

What this leaves you with

Two things a calculator can honestly regionalize: operating cost, using your own bill in place of the national rate above, and scope, using your own freeze exposure and discharge answers. Everything else that varies by place — labor rates and permit specifics chief among them — is a local question this site answers by telling you exactly who to ask, rather than by publishing a number nobody could check against your address.

Related pages

• Operating cost — run your own electricity rate through the formula above.
• Price drivers — the full list of what moves a quote.
• Sources and update log — the regional data series flagged for a future pass.