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Central Ohio water and plumbing

Gahanna's water, sewers and bathrooms, from the mill town to the Columbus contract

Gahanna was laid out on Big Walnut Creek in 1849 and, the city says, incorporated in 1881, and from 1886 to 1913 the Ohio State Board of Health's annual reports show it with no public water supply and no system of sewerage at all. The year the first mains and the first sanitary sewers went in is not in any document read for this page, so this page says so instead of guessing a decade. What can be dated is the creek: the United States Geological Survey records its flow as completely regulated by Hoover Dam from September 1954 and diverted for part of the Columbus supply from June 15, 1956, and Gahanna's taps run on that same creek today. In between, the 1950 census measured the ground the village sat on, and those figures are printed here in the table's own words.

Last updated September 2026 · Figures are the Ohio State Board of Health's, the Census Bureau's, the Geological Survey's and the City of Gahanna's own, read September 2026 · No prices on this page; the Estimate Builder carries those · Part of the knowledge base

A mill town on Big Walnut Creek

The City of Gahanna says the town was founded along Big Walnut Creek in 1849 by John Clark, and an 1880 county history, published independently of the city, gives the same year and the same man: the village "was laid out in 1849, by John Clark, esq." There were two towns before there was one, though: the same 1880 history records a second plat, "properly called Bridgeport, was laid out in 1853, by Jesse Baughman," across Granville Street; the city gives that year and that man too, and the two later became one. As late as 1880 the county history called the place "a hamlet of about three hundred population" and stated flatly that "The village was never incorporated." The City of Gahanna says fifty-five citizens petitioned Franklin County the following March, that incorporation "was granted in June and was recorded on August 8th, 1881," and that the first mayor was sworn in on October 6, 1881.

The creek is the reason the town is where it is. The 1880 history records that the first grist mill in Mifflin township "was built in 1859" at Gahanna, by Joel and Jesse Baughman, and the City of Gahanna says its settlers took water, food and power from Big Walnut Creek and that "The original millrace site can still be seen along the Big Walnut Creek."

The name, and what two publishers say it meant

Both publishers agree that Gahanna was the creek's older name: the 1880 county history writes of "the Gahanna river, commonly called Big Walnut creek," and the City of Gahanna gives Gahanna as the former name of the Big Walnut. What the word meant is not settled. The city says it comes from a Native American word for three creeks joining into one. The 1880 history says instead that the stream "was then known as the Gahanna, or Big Belly," and that the second name was that of an Indian well known in the country. Both print as their publishers' accounts, neither as the meaning.

What the village told the state it had, from 1892 to 1913

The Ohio State Board of Health printed what every village reported to it, year after year, and Gahanna is in those volumes from 1892 onward. It is the village's own report to the state, and the best evidence available of what a Gahanna household used for water and waste in those years.

In the board's report for 1893 Gahanna appears with a population of 207 and a village health officer. That figure is the one the health officer returned on the state's annual questionnaire, not a census count. Question nine of that questionnaire asked each town to describe the public improvements of a sanitary character made during the year, and larger towns answered with miles of sewer. Gahanna's entire answer was: "The hog pens, slaughter houses and filth removed."

In 1896 the secretary of the Ohio State Board of Health drove out at the mayor's request and wrote of "The Mayor of Gahanna, a small village eight miles from Columbus" that "There is no board of health in the village," and that the mayor had been acting as health officer without legal authority.

The entries after that are short: an estimated population of 306 in 1898, printed with "No report." where other towns described their sanitary work; in 1900 the mayor's whole report that the village "is in splendid condition," beside an estimated 234; and in 1903, "Population, 400. Person making report, D. L. Stygler, mayor and health officer." Those figures are officers' estimates rather than counts.

The most useful thing in those volumes is what is not in them. Across every annual report of the Ohio State Board of Health from 1886 through 1913, Gahanna appears only in the rosters of village health officers, in the summaries local boards sent in, in the investigation of 1896, and in one laboratory table of water samples, printed in 1905 under a heading the volume prints in capitals as EXAMINATIONS OF MISCELLANEOUS WATERS rather than in any report on a public supply. No report on a public water supply for the village, and none on a system of sewerage, appears in any of them. The board investigated and approved village water works and sewer systems in those same years and printed the reports by place, which is what makes the absence worth stating; it is an absence in a searched record, not proof that no pipe existed.

Three dates that are not in the record

Three things a page like this ought to be able to say, it cannot. No document read for this page gives the year Gahanna first laid public water mains, or where that water came from. None gives the year its first sanitary sewers were built, or where the sewage went. None gives the date of a first water or sewer contract with the City of Columbus.

Here is where the looking was done, so the blank reads as a decision rather than an oversight. The City of Gahanna's history page, walking tour brochure, public utilities pages, consumer confidence report and frequently asked questions carry no such date. The Ohio State Board of Health's annual reports from 1886 to 1913 carry no water supply or sewerage report for the village at all. The City of Columbus's own list of the communities it serves names Gahanna and gives no date, no year and no ordinance number for any community on it. The City of Gahanna's annual financial report for 2023, filed with the Ohio Auditor of State, describes the purchase of water and sewer treatment from Columbus in the present tense and never says when it began. The city's code of ordinances could not be read through either commercial service that publishes it. A decade guessed from the age of the housing would be worth nothing; no source found is the honest entry.

What the census measured, and what it could not

The Census Bureau counted 417 people in Gahanna village in 1930, 425 in 1940 and 596 in 1950. At that size the village was rural on the Bureau's own definition, which drew its line at 2,500 people, and Gahanna is not among the places listed in the Columbus urbanized area in 1950. The 1950 housing volume, which published separately only for places of 1,000 or more, carries no Gahanna line at all.

The 1950 census tract report does reach the ground the village sat on, but never by name. It is titled Census Tract Statistics, Columbus, Ohio, and Adjacent Area, and it tracts the county outside the city as well; Gahanna lay inside Mifflin township, divided there into two tracts, MI-74 and MI-75. Those tracts cover a great deal more ground than the village did, so the figures below describe Mifflin township and not Gahanna. They also measure condition and plumbing together: "No private bath or dilapidated" counts a dwelling unit that lacked a private bath or was dilapidated, and the two cannot be split apart. The Columbus column comes from the same table and the same definition.

1950 census tract report, Table 3All dwelling unitsNumber reporting"No private bath or dilapidated""No running water or dilapidated"
Tract MI-74, Mifflin township958905435360
Tract MI-75, Mifflin township1,2971,215468241
City of Columbus111,721108,28619,458not read for this page

Counted another way, the 1950 Census of Housing published a column for the part of Franklin County it called rural nonfarm, the residence category Gahanna's houses sat in: 13,481 dwelling units, of which 6,127 had no bathtub or shower and 5,927 had "Other toilet facilities (including privy)." That universe is the whole county's rural nonfarm territory, not Gahanna. Of the 12,420 of those units reporting a year built, 3,285 had gone up in 1945 or later. What the same Bureau recorded about the Ohio bathroom decade by decade is on the page about how and when Ohio homes got indoor plumbing.

The creek: regulated in 1954, diverted in 1956, over its 1913 mark in 1959

Big Walnut Creek stopped running free in the 1950s, and the most precise published statement about when is a federal gaging record. In its station descriptions for the creek, the United States Geological Survey writes that flow is "completely regulated by Hoover Dam beginning September 1954," and that Columbus began diverting water above the downstream gage for part of its municipal supply on June 15, 1956. Those describe a gage record of the creek, not when the reservoir was finished; this site's page on where Columbus water comes from records that the city's documents give more than one year for Hoover, and the survey's dates do not correct them.

Less than five years after regulation began, the creek passed its 1913 mark anyway. At the survey's gage downstream of Gahanna, near Rees in Franklin County, the January 1959 flood peaked at one in the afternoon on January 22 at a gage height of 22.03 feet, against 20.5 feet for the flood of March 25, 1913. The survey noted that Hoover Reservoir stored more than two inches of runoff during that storm and the creek downstream still passed the older mark, and that the three Columbus water supply reservoirs carry no flood storage capacity. That gage is well downstream of the village, below the Alum Creek junction, so it reads the river and not the water in the town. That same rise on Big Walnut Creek is named on the page about what goes wrong in a Central Ohio house. The fuller record of that crest, the dam on the creek and the flood maps covering Gahanna are on the floods, dams, levees and floodwalls page.

For the town itself the account is the Gahanna Historical Society's. The society writes that "Our Mill Street, in Old Gahanna, is in the floodplain," that Mill Street and many of its buildings took several feet of water in 1959, and that a glacial boulder placed in Lintner Park carries a plaque marking how high the water stood. The society also says the flooding of the 1950s and 1970s led the city council to pass what it calls "Central Ohio's first flood retention and detention law." That is the society's statement in its own words; no ordinance number or date for it was found.

From village to city, and a charter date the city gives twice

Under Ohio law the difference between a village and a city is a population count rather than a vote. Ohio Revised Code section 703.01 provides that villages "which, at any federal census, have a population of five thousand or more" become cities. No source read for this page gives the year Gahanna's classification changed.

The charter is on the record twice, with two dates. The City of Gahanna's list of frequently asked questions says that "The City of Gahanna adopted its current City Charter January 2, 1962." The city's own annual financial report for 2023, filed with the Ohio Auditor of State, says the current charter "was adopted by the electorate June 27, 1961." Both documents are the City of Gahanna describing itself, so this is one publisher giving two dates rather than two publishers disagreeing; neither prints here as the date, and no document read for this page explains the difference.

What the population did is not in doubt. The census counted 596 people in the village in 1950. The Census Bureau's April 1, 2020 estimates base for Gahanna city is 35,727 and its estimate for July 1, 2024 is 35,544, the base being the 2020 count as revised for the estimates series. Everything this page has to say about pipes sits between those two numbers.

Where Gahanna's water and sewage go now, and who owns which pipe

The City of Gahanna describes itself as a "master meter" community: it buys treated water from the City of Columbus and treats none of its own, and the federal drinking water inventory records the same arrangement, coding the system's primary source as purchased surface water. The city's consumer confidence report says that water is "surface water from the Hoover Reservoir via the Big Walnut Creek," treated at the Columbus plant on Morse Road, so the creek the town was laid out on is the creek its taps run on. The federal inventory numbers the system OH2501303, with 10,638 service connections serving 33,258 people, that last figure being the system's own reported number and not a census count.

On the waste side the city calls itself a satellite community: it sends its sewage to Columbus for treatment and owns and maintains the pipes under its own streets. Not every house inside the city is on that system. The city tells residents "who are not tied to the City's sanitary system" to maintain their own household treatment system, which makes a bathroom in such a house a different job. What one of those systems is is on the page about wells and septic systems, where Columbus takes the sewage it accepts is on the page about the Columbus sewers, and which utility serves a given address is on the page about water and sewer providers.

Who owns which pipe is jurisdictional, and what follows is the City of Gahanna's own division, for addresses inside the city and no other place. The city says it maintains the sanitary mains and that the property owner maintains the sanitary lateral, the pipe from the main to the building. On the water side the city maintains the mains and the line as far as the curb box, which it describes as sitting in the front of the property near the sidewalk, and the property owner maintains the water lateral from the curb box into the building. A Columbus address or a township address may divide it differently; the Columbus arrangement is on the page about sewer laterals and house drains.

Two things follow from being a city that buys its utilities. Gahanna keeps no health department of its own: it says it contracts all health-related services through the Franklin County Board of Health, and that plumbing work on a Gahanna building permit is "Inspected by Franklin County Public Health." That is the far end of an arc beginning in 1896. And the city is building an inventory of the material of every water service line under the federal Lead and Copper Rule Revisions, publishing it as a map searchable by address and sorting each line as non-lead, unknown, lead, or galvanized requiring replacement.

What a remodel in an older Gahanna house meets today

A bathroom in an older Gahanna house meets the rules of whichever office reviews that address, and this site's existing pages carry what does not vary from street to street: the permit page, the Ohio plumbing code page, the lead and asbestos page for a house built before 1978, the supply pipes page and the floors and subfloors page. Nothing on this page changes any of that.

The short version. Gahanna was laid out on Big Walnut Creek in 1849 and, the city says, incorporated in 1881, and the Ohio State Board of Health's annual reports from 1886 to 1913 carry no water supply or sewerage report for the village at all. The year the first mains and the first sewers went in was not found in any document read for this page, and no decade is guessed. In 1950 the census counted 596 people in the village, and in the two Mifflin township tracts around it, 435 of 905 dwelling units reporting in one and 468 of 1,215 in the other fell in the category "No private bath or dilapidated."

Sources

Every figure, date and quotation on this page comes from one of these documents, read on the date given. Where two of them disagree, the page says so.

Common questions

When did Gahanna, Ohio first get public water mains and sanitary sewers?

No document read for this page gives either year. The City of Gahanna's history page, walking tour, utilities pages, consumer confidence report and frequently asked questions carry no date; the City of Columbus lists Gahanna as a community it serves and gives no date for any community on that list; and the city's 2023 annual financial report describes the purchase of water and sewer treatment from Columbus without saying when it began. What the record does fix is a floor and a ceiling. The Ohio State Board of Health's annual reports from 1886 to 1913 carry no water supply or sewerage report for the village, and today the city owns its pipes and buys both services from Columbus.

What did the Ohio State Board of Health find in Gahanna in the 1890s?

A village with no works of its own and, in 1896, no board of health. In the board's report for 1893 Gahanna appears with a population of 207 returned by its own health officer rather than counted by the census, and its answer to the state's question about the year's public improvements of a sanitary character was that the hog pens, slaughter houses and filth had been removed. In 1896 the board's secretary drove out at the mayor's request and reported that there was no board of health in the village and that the mayor had been acting as health officer without legal authority.

What does the name Gahanna mean?

Two publishers agree that Gahanna was the older name of Big Walnut Creek, and they do not agree on what the word meant. The City of Gahanna says it comes from a Native American word for three creeks joining into one. An 1880 history of Franklin and Pickaway counties says instead that the stream was then known as the Gahanna, or Big Belly, and that the second name belonged to an Indian well known in the country. Both are printed as their publishers' accounts and neither is settled. The same 1880 history separately records that Big Walnut, Alum and Blacklick unite their waters in section seventeen.

Does the 1950 census say how many Gahanna homes had a bathroom?

Not for Gahanna by name. The village held 596 people in 1950, below the 2,500 the Census Bureau used to define an urban place and below the 1,000 at which the housing volume published separate figures, so no Gahanna line appears in it. The tract report titled Census Tract Statistics, Columbus, Ohio, and Adjacent Area does cover the ground, but it tracts Mifflin township as MI-74 and MI-75, both far larger than the village was. Of the dwelling units reporting in those two tracts, 435 of 905 and 468 of 1,215 fell in the table's combined category, no private bath or dilapidated.

How many people lived in Gahanna in 1950, and how many live there now?

The Census Bureau counted 417 people in Gahanna village in 1930, 425 in 1940 and 596 in 1950. Its April 1, 2020 estimates base for Gahanna city is 35,727 and its estimate for July 1, 2024 is 35,544, the base being the 2020 count as revised for the estimates series rather than the published count itself. Between those two figures the place changed from a village the state's health board recorded as having no water works and no sewers into a city that buys treated water and sewage treatment from Columbus and owns the pipes in between.

In Gahanna, who maintains the water line and the sewer line to a house?

The City of Gahanna divides it at two points, and that division covers addresses inside the city and no other place. The city says it is responsible for maintaining the sanitary mains and that the property owner is responsible for the sanitary lateral, the pipe running from the main to the building. On the water side the city maintains the mains and the line as far as the curb box, which it describes as sitting in the front of the property near the sidewalk, and the property owner maintains the water lateral from the curb box into the building. A Columbus address or a township address may divide it differently.

Does Gahanna have its own health department?

No. The City of Gahanna says it contracts all health-related services through the Franklin County Board of Health, and that plumbing work on a Gahanna building permit is inspected by Franklin County Public Health rather than by the city, which is worth knowing before anything is scheduled. It is also the far end of a long arc. In 1896 the secretary of the Ohio State Board of Health drove out to the village and reported that there was no board of health in it at all, and that the mayor had been acting as health officer without legal authority.

Is every house inside Gahanna connected to the city sewer?

No. The City of Gahanna calls itself a satellite community, meaning it sends its sewage to the City of Columbus for treatment while owning and maintaining the pipes under its own streets. The city also tells residents who are not tied to the city's sanitary system to maintain their own household treatment system, which is the city's own way of saying that some houses inside the city limits are not on a sewer at all. For a bathroom project the two situations are different jobs, and which one applies is worth settling early.

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