Well Water vs City Water: Drought Status and Rate History

Say you are choosing between a house on city water in one town and a house on a well in another. You are comparing two very different amounts of paperwork. The city tap comes with a seven-digit system ID, three years of quarterly violation history in an EPA database, and a water quality report the utility has to deliver by July 1 each year. The well comes with nothing. No federal file, no report, and usually no state one either. Whatever is known about that water is known because someone paid a lab.

Neither is automatically the safer choice. They fail in different ways and get more expensive in different ways, so the checks differ too: the supplier and its record, the drought map, and the bill, each from a free federal or state page.

Flood exposure is covered in reading a flood map for one address, and insurability in where homeowners insurance is hard to get.

Who actually supplies the water at this address

"City water" on a listing tells you the house has a meter. It does not tell you who runs the system. That might be a city department. It might be an investor-owned company with a state rate case pending, or a special district, or a small system that buys treated water from a bigger neighbour and resells it. Each of those has a different record and a different body that approves its rates. So the first lookup is the system's name and its ID.

EPA describes the Safe Drinking Water Information System as the database that "contains information about public water systems and their violations of EPA's drinking water regulations." You reach it through ECHO, EPA's enforcement and compliance site, under Drinking Water System Search at echo.epa.gov. The search results help page documents the result columns, not the form's filters, so only the columns are described here.

What comes back has an ID, and the format is fixed: "It consists of a two-letter state or region code, followed by seven digits." If a seller or landlord can show you a recent bill or annual report that carries a system ID, match it to the ECHO record. That one step settles which system you are looking at. Without it, two systems with similar names in the same county are easy to mix up.

Three columns in the results describe the system before you look at any violations:

• System Type. A community water system serves at least 15 service connections used by year-round residents. That is the kind a house is on. The help page's general definition of a public water system is at least 15 connections, or an average of at least 25 people for at least 60 days a year.
• Primary Source Water Type. Surface water (a river, reservoir or intake), ground water from protected wells, or ground water "under the direct influence of surface water." There are also purchased versions of each, meaning the system buys its water from someone else. Any surface source at all puts the system in the surface water class, "even though more groundwater may be supplied than surface water," as the help page puts it. A purchased-water system's supply is really the seller's supply. Look the seller up too.
• Population Served. The help page calls it "the estimated average daily population served by a system." It matters twice in this piece. It sets how often the system has to report to you (see below). And a system serving a few hundred people has far less staff and money to absorb a failed treatment plant than one serving two hundred thousand.

Texas has an extra tool worth knowing about. The Public Utility Commission of Texas says it regulates "the state's electric, telecommunication, and water and sewer utilities." Its water page links a Water and Sewer CCN Viewer, a map of certificated service areas. If a Texas address sits between two providers, that map is where you find out whose area it is. The commission's pages were not verified at the source on 26 October 2026, so confirm the viewer link there before you rely on it.

If the address turns out to have no system at all, because the house has its own well, skip ahead to the well section. ECHO and the annual report will not have anything on that house.

Reading three years of violations without overreacting

The ECHO results row has dozens of columns. Four of them carry most of the information for a household deciding where to live.

Quarters with Violation (3 years). This is the number of quarters the system was in violation over the past three years. It covers "the 12 most recent official quarters" plus new violations reported since the last official quarter. A 0 is clean. A 12 means some violation was open every quarter for three years. That does not have to be a health problem, which is why the next column matters.

Health-Based Violations. ECHO keeps these separate from paperwork failures. A health-based violation is a breach of a maximum contaminant level, a maximum residual disinfectant level, or a required treatment technique. The help page defines the first two as limits that "specify the highest concentrations of contaminants or disinfectants, respectively, allowed in drinking water." A system with eight quarters of violation that are all Monitoring and Reporting missed sampling or paperwork deadlines. That says something about how the system is run. A system with one health-based quarter delivered water over a legal limit at least once. These are different findings, and a total that adds the two together describes neither.

Lead Action Level Exceedances (5 years). This counts the times the system's 90th-percentile lead sample went over the action level of 0.015 mg/L in the past five years. For an older house it may be the most useful single number on the row. A lead problem in the distribution system does not stop at the meter.

Has New Violations. Violations reported since the last official quarter. ECHO marks them as draft that "do not reflect the official compliance status." Treat them as a reason to ask the utility a question, not as a finding.

All of this lags. The help page says the compliance data in ECHO "may lag by three to six months." Separately, "data about violations in each calendar quarter becomes available in SDWIS after the end of the following quarter." So a violation in the July-to-September quarter of 2026 will not show up before the end of December. A clean ECHO row for a town you are looking at this autumn describes the system as of roughly spring.

For each candidate system, copy these into your sheet: the PWS ID, the source type, the population served, quarters with violation, health-based yes or no, and lead exceedances. Then open the Detailed Facility Report from the results panel to see which rule was broken and when. A single nitrate exceedance in 2023 that was followed by enforcement and then three clean years is a different story from a treatment technique violation that is still open.

The report the utility has to send you, and the 2027 change

The Consumer Confidence Report, often called the annual water quality report, is the system's own account of the previous year. The rule is in 40 CFR part 141, subpart O. The text quoted here is from the eCFR, 1 October 2026 edition. Section 141.151(a) says the subpart "establishes the minimum requirements for the content of reports that community water systems must deliver to their customers." That limits it to community systems. A private well has no report.

The timing, under § 141.152(b): "Each existing community water system must deliver reports according to § 141.155 by July 1 each year. Each report delivered by July 1 must contain data collected during the previous calendar year." So in October 2026 the current report covers calendar 2025.

The 2024 amendment (89 FR 46008, published 24 May 2024) changes this from 2027. Section 141.152(a) says "Beginning January 1, 2027, community water systems must comply with 40 CFR 141.151 through 141.156." Under the new § 141.155(j)(2), "each community water system serving 10,000 or more persons must distribute the report biannually, or twice per calendar year, by December 31." The July report stays. Larger systems add a second one by year-end. If you are comparing towns in 2027 or later, a mid-sized city's latest report may be only a few months old. A small system's may be a year old.

Whether you can read the report before you move depends partly on size. Under § 141.155(f), a system serving 50,000 or more people "must post its current year's report to a publicly-accessible site on the internet." Smaller systems have to make the report available on request, so for a small town you may need to email the utility and ask. EPA's CCR page lists a "Find your local CCR" link under its consumer section.

The source section is the part of the report that matters for drought planning. Section 141.153(b)(1) requires every report to name the type of water (surface or ground) and "the commonly used name (if any) and location" of the body of water. That one paragraph answers the question ECHO only gives you as a code: which river, which reservoir, which aquifer. You need that name for the next step, because drought risk belongs to that particular source.

If the house is on a well

EPA's private wells page is blunt about it. "Private well owners are responsible for delivering safe drinking water to their households." And: "The quality and safety of drinking water from private domestic wells are not regulated by the Federal Government under the Safe Drinking Water Act nor by most state governments and laws."

This is not a small group of homes. The same page says "around 15 percent of the U.S. population (over 43 million) rely on private wells." It cites a USGS study of about 2,100 wells which found that "water pumped from about one in five wells contained one or more contaminants at a concentration greater than a human-health benchmark for drinking water."

What you can look up from your desk for a well is much thinner than for a utility, so the work moves to questions and lab reports. EPA's testing guidance gives the baseline: "Test your private well annually for total coliform bacteria, nitrates, total dissolved solids, and pH levels." It also calls for testing right away when, among other things, "conditions near your well have changed significantly (i.e. flooding, land disturbances, and new construction or industrial activity)." That second trigger is relevant if the house is on the edge of a growing town. A new subdivision upslope counts.

At least two states require a test when the property changes hands:

New Jersey. The Private Well Testing Act was signed in March 2001 and took effect on September 14, 2002. The state describes it as "a consumer information law that requires sellers (or buyers) of property with potable wells in New Jersey to test the untreated groundwater for up to 43 parameters." Both parties have to review the results before closing. A rental counts as well: "Landlords are also required to test their well water once every five years" and must give each tenant a copy. That matters if you plan to rent before you buy. The law does not stop a bad sale, though: "The law does not prohibit the sale of property if the water fails one or more drinking water standards." The state says about 25% of the wells in New Jersey have been tested under the Act. Its interactive maps of the results are linked from the same page. They are one of the few public sources that show what neighbouring wells in an area have tested positive for.

Oregon. The Oregon Health Authority's testing requirements page says the Domestic Well Testing Act (ORS 448.271) "applies to the sale or exchange of real estate with a domestic well." The seller tests for arsenic, nitrate and coliform bacteria, at an accredited laboratory, and files the results with a Real Estate Transaction form. The page says the results are valid for one year, and that spring wells, irrigation-only wells and wells on undeveloped land are exempt. The OHA page also gives the seller 90 days to send the test results to the buyer, and 90 days to send the form and results to the authority. The statute, ORS 448.271 (not verified at the source on 26 October 2026), puts the same duty on the seller once an offer is accepted, and says failure to comply "does not invalidate an instrument of conveyance executed in the transaction." The buyer is owed the results, but a sale that closes without them still stands.

This piece covers only those two states. If your candidate is somewhere else, look on the state health or environmental agency's private well page for any testing requirement at sale. Do not assume there is one.

Here is the order for a well-served candidate. First, ask for the most recent lab report and its date, and compare the tests against EPA's four-item baseline at least. Second, ask for the well's depth and the date it was drilled; the state's well-log database usually has the driller's record. Third, check how deep the groundwater sits in that area right now, which is the next section. A shallow well in an aquifer that has been falling for three years is a cost that is still coming.

Drought status: the weekly map and the longer record

The U.S. Drought Monitor is "a map released every Thursday, showing where drought is and how bad it is across the U.S. and its territories." It comes out "using data through the previous Tuesday morning and building upon the previous week's map." It is "not a forecast."

The classification page sets out five levels. The map "uses four categories of drought, from D1—the least intense—to D4," plus D0 for areas that are abnormally dry and may be going into or coming out of drought. Each level lines up with a percentile range for its indicators:

D2 means conditions at the dry end of the historical range, around the 5th to 10th percentile. D4 is the driest 2 percent.

There is also an impact label. S means short-term, "typically less than 6 months," tied to agriculture and grasslands. L means long-term, typically more than six months, tied to hydrology and ecology. SL means both. The page explains that long-term drought "has deeper impacts on hydrology and ecology and can persist even with short-term gains in precipitation." For a water supply, that makes the L label the one to watch. The inference is not the Drought Monitor's own: a wet month can erase an S, but a reservoir or aquifer that has been drawn down over two summers does not refill in one month.

A single week tells you almost nothing about a town you might live in for ten years. The current week's map shows conditions, not climate, so a "no drought" week says nothing about the last five summers. The Data Tables page lets you pick County as the area type and get weekly percentages of area in None and D0 through D4. Its note is a fair warning: "The values in this table are for places represented as areas." A county can be 30 percent in D2 while the reservoir that feeds your candidate town sits in the other 70 percent, or the other way round. The Data menu also lists Time Series and Weeks in Drought. Those outputs are not described here, and no county's figures were checked for this piece.

For a sheet, two numbers per candidate county are enough. One: the share of weeks over the last five years with any D2 or worse. Two: whether the most recent D2-or-worse stretch was marked L. Five years is a choice, not a standard. Pick one period and use it for every town so the rows can be compared.

For a well, or a utility that pumps groundwater, the Drought Monitor is one step away from the thing you care about. USGS has closed the old groundwater pages. Its Water Data for the Nation announcement says "we have decommissioned the legacy NWISWeb landing pages that helped you discover these data and these pages are no longer accessible," and that "the Monitoring Location Pages (MLPs) serve as the central entry point for all water data collected at a location." Start at waterdata.usgs.gov. It says USGS has "over 13,500 real-time stream, lake, reservoir, precipitation, water quality, and groundwater monitoring locations." Use the map there to find the nearest groundwater site and open its Monitoring Location Page. Old bookmarks and older articles that point to the NWIS groundwater pages now go to that blog post instead.

When you open a groundwater site, the useful reading is the trend, not the latest value. A water level that has dropped a little each year for a decade means something different from one that falls every summer and recovers every spring. A monitoring well a few miles away does not tell you about the aquifer under one particular house. It does tell you which way the regional aquifer is moving. And it gives you something specific to ask a local well driller.

Rate history: who approves the increases, and how to measure them

A water bill grows in a different way from a property tax bill. There is no assessment and no millage. A board or commission adopts a new rate schedule, often for several years at a time, and the increases come in steps. The question for a ten-year comparison is how fast those steps have come, and who has to approve the next one.

The answer depends on who owns the system, which is why ownership was the first lookup. In California, the CPUC's Water Division "regulates over a 100 investor-owned water and sewer utilities under the CPUC's jurisdiction providing water service to about 16 percent of California's residents." The division "analyzes, and processes utility rate change requests." For a house served by one of those companies, the rate history is a public file of filings at the commission. That is the most complete history you can get anywhere.

The CPUC page does not break down the other 84 percent. Much of the rest is served by systems that a city, county or district runs, but not all of it: households on private wells, and small systems that are not investor-owned, such as mutual water companies, are in that share too. For a city-, county- or district-run system, the rates are set by that body's own council or board, not by a state commission. The CPUC page does not say this outright; it follows from its description of its jurisdiction as investor-owned utilities, and other states draw the line in their own way. Check the utility's own website for who approves its rates before you go looking for filings. This is also where special districts come in: a water or utility district that charges through the tax bill is covered under the property tax lookup in the bill you will actually get, not here.

For a city- or district-run system, the documents are usually these, in rough order of how easy they are to find:

1. The current rate schedule on the utility's website. It normally shows a fixed monthly charge by meter size and a charge per thousand gallons or per hundred cubic feet. Some have tiers.
2. The council or board resolution or ordinance that adopted it. Search the city's agenda archive for "water rates" and the year. Multi-year schedules are common, and the resolution often lists the increases already approved for the next few years. That is the most useful find in this whole process: future bills that have already been voted on.
3. Older rate schedules. Ask the utility for its rate history, or look at archived copies of the rates page.

Then work out one number per town: the annualized increase in a typical monthly bill. Choose one usage level, for example 6,000 gallons a month on the smallest residential meter, and price it under the oldest schedule you can find and under the current one. The calculation is:

annualized increase = (current bill ÷ old bill)^(1 ÷ years between them) − 1

To make that concrete, with made-up figures: a typical bill of $48 a month ten years ago and $79 now gives (79 ÷ 48)^(0.1) − 1, about 5.1 percent a year. Those are illustration numbers, not any real utility's. Use the same usage level for every town. Otherwise you are comparing two different households instead of two schedules. If a schedule changed from flat pricing to tiers partway through, price your usage under both and write down that the structure changed.

How water compares with energy and other utilities in your overall budget is covered in heating and cooling cost by climate zone. This section is only about how fast the water line has grown.

For a well, the rate history question becomes a cost schedule you pay yourself: the annual lab tests, the pump's electricity, and eventually a pump replacement or a deeper well. None of that is published as a rate. The best you can do is ask a local driller and a local lab for current prices, and write them down with the date you were quoted.

The water rows on the sheet

One column per candidate town. Rows marked "utility" apply only to city water; rows marked "well" apply only to a well. Fill them in using the sources above.

When a cell can't be filled, that tells you something too. A small system with no report online, no rate history in its board minutes, and a source the CCR names only as "wells" is less transparent than a large system with a commission docket. Write down that the information was missing. Don't leave the cell blank, or it will later read as if there were no problem.

The lookups end in questions, not verdicts: which source, which violation, which rate step is already voted. The answers come from a lab test on the actual tap, a well inspection by someone licensed in that state, and the utility itself, and they are easier to get before you have signed anything.

Sources: the federal and state pages linked above, read on 26 October 2026. Quotations from 40 CFR part 141 are from the eCFR, 1 October 2026 edition.