Plumber Memphis: The Utility Calls Your Water Line a Shared Responsibility and Does Not Say Where the Sharing Stops
Memphis Light, Gas and Water publishes a sentence on its water service line page that is unusual among American utilities. It says the water service line is a shared responsibility between MLGW and the homeowner. It then stops. No split point is given, no property line is named, no valve is nominated as the handover. Read on its own, that sentence tells a homeowner facing a quote almost nothing about which half of a broken pipe is theirs.
The answer exists. It is just in a different document by the same utility, and almost nobody reads that one. This page puts the two side by side, then covers the things that actually make Memphis plumbing different from plumbing anywhere else we work: an aquifer instead of a river, water soft enough to make a softener pointless, two lead cut-off dates twenty years apart, and a sewer system the city separated in the aftermath of an epidemic.
This is the Memphis entry in our Tennessee service areas directory. It does not repeat what the state page already covers, which is the freeze and boil water advisory mechanism, the Limited Licensed Plumber credential and the west-versus-middle Tennessee geology contrast.
The Question Every Quote Assumes
Where MLGW stops and your pipe starts
The MLGW 2025 Service Policy is a public document and it answers the question the lead page leaves open. Section 3.20 states that MLGW will furnish the material and labour to install connections to its mains, including the meter and the meter box, and that those connections will be located at or near the property line in front of or at the side of the premises to be served.
Section 3.22 then names the boundary outright. The points of delivery will be at the outlet side of the meter in meter connections. The customer piping begins at the point of delivery, and the customer is responsible for the installation and maintenance of the piping from the delivery point into the premises.
That is a clean line, and it is further out than many homeowners assume. The tap, the connection, the meter and the box around it are the utility. Everything downstream of the meter outlet is yours, whether it is under your lawn, under your driveway or under the slab.
Two Dates, Two Authorities
The lead timeline in Memphis has a twenty year gap in it
MLGW publishes both halves on one page and most readers skim past the second. MLGW stopped using lead service lines in the 1950s. Shelby County stopped allowing developer use of lead pipes in houses in 1973. One date is the utility, the other is the county, and they are two decades apart.
That gap is the practical part. A house finished in Shelby County in, say, 1964 could sit on a utility connection that was already lead free and still have had lead put in on the private side by the developer, entirely legally. The age of the street tells you about MLGW work. The age of the house tells you about the half you own.
MLGW also states the reassuring half plainly. Its wells, water pumps and main lines are not made of lead, and the 2025 water quality report says there is no detectable lead in Memphis source water. Whatever lead exists here got in from plumbing, not from the aquifer.
What the utility has actually done, and one sentence you must date before you trust it
MLGW says it has been replacing lead service lines since 2012 and has inspected or replaced more than 11,000 since then. It says it treats drinking water with orthophosphate, which creates a barrier between pipes and water, and that even a home with lead pipes is protected by that coating. It reports completing and submitting its federal lead inventory to the Tennessee Department of Environment and Conservation in September 2024. Its 2025 sampling round put the 90th percentile lead result at 4.73 parts per billion, with zero of fifty sites exceeding the action level.
The free test that costs a phone call
MLGW offers a free lead testing kit to water customers in Memphis and Shelby County. The request route published in the 2025 report is an email to the water lab or a call to 901-320-3962. A public lead inventory map sits on the same water service lines page. Getting your own line identified before anybody quotes you on it is the cheapest step in the whole process, and it is one of the few in plumbing that is genuinely free.
Our leak detection page explains how a buried supply line is traced without opening the whole run, which is the other half of this problem: knowing what the pipe is made of does not tell you where it is failing.
Sand, Not River
Memphis drinks from an aquifer, and your pipes can tell
MLGW states that Memphis stands among the select few cities with a water supply sourced entirely from groundwater, drawn from the Memphis Sand Aquifer through more than 142 wells across Shelby County, delivered to ten pumping stations, then aerated, filtered, treated and distributed. The layers above it act as a natural filter, and the report notes that some experts believe the water arriving at your tap today fell as rain more than 2,000 years ago.
The romance is fine, but the numbers are what change a plumbing decision. Average hardness in the 2025 report is 48 parts per million, which is 2.8 grains per gallon. That is soft water by any ordinary reading, with the measured range running from 0.8 to 8.8 grains per gallon across the system.
Why that matters more than it sounds like it should
Limescale is a hard water problem. It furs up heating elements, chokes aerators, shortens water heater life and drives most of the softener industry. At 2.8 grains per gallon Memphis is simply not in that fight. If somebody is selling you a softener here, the reasonable question is which number in the published water quality table they are proposing to change, and by how much.
The opposite risk is the one worth attention. MLGW reports average pH at 7.3, with a range from 6.2 to 7.9, and alkalinity averaging 57 parts per million. It also reports phosphate at 0.75 parts per million and describes it, in its own table, as a water additive for corrosion control. A utility does not dose phosphate into water that is chemically kind to metal. In Memphis the long term enemy of old plumbing is corrosion rather than scale, which fits the local housing stock of galvanized supply and cast iron waste.
One more number nobody mentions
Average water temperature in the system is 66 degrees Fahrenheit, ranging from 63 to 71. Cold water arriving at that temperature into a humid Memphis summer is why exposed supply lines sweat here, and condensation on a cold line is regularly mistaken for a leak. Before anyone opens a ceiling, it is worth ruling out the possibility that the pipe is simply wet on the outside.
It also flatters your water heater. Water entering at 66 degrees needs far less energy to reach setpoint than water entering at 40, which is why heater recovery complaints in this city more often trace to a failing element, a broken dip tube or sediment than to genuine undersizing. Our water heater repair page covers how that gets diagnosed.
A Decision Made in 1878
Memphis separated storm from sewage before most of the country
The City of Memphis records the reason without softening it. During the late 1800s the city went through a yellow fever plague, and engineers recognised the need to separate the sanitary system from the storm water system. The city says that decision made Memphis one of the first in the country to introduce a separate piping system for sewer and storm water.
It still holds. Memphis maintains a storm sewer system completely separate from the sanitary sewage system. Public Works crews maintain over 3,000 miles of sanitary sewer built from concrete, vitrified clay, PVC and ductile iron, along with roughly 100 sanitary lift stations, while the flood control side runs seven major pumping stations, twenty miles of earth levees, two miles of concrete floodwalls, thirty floodgates and 643 acres of reservoirs.
What separated sewers change about your own diagnosis
This is not civic trivia. In a combined sewer city, a drain that backs up during heavy rain can be the public system surcharging into the house, and the homeowner may have done nothing wrong. Our Louisville page covers a city where a single expressway roughly marks the boundary between combined and separated systems, and which side you live on changes the failure you are exposed to.
Memphis does not have that split to argue about. The two systems do not mix, so a backup that follows the rain is far more likely to be about your own lateral: a crack letting groundwater in, a root mass that only overwhelms the line when flow rises, or a low spot holding water. That narrows the investigation usefully rather than widening it.
- Vitrified clay. Named by the city as one of the four materials still in service. Clay joints are the classic root entry point, which is why camera work rather than guesswork is the honest first step on a repeat blockage.
- Concrete. Durable but vulnerable to corrosion from sewer gases over long service lives, particularly above the flow line.
- Ductile iron and PVC. The newer end of the stock. Where you find these, age is less likely to be the explanation for a failure.
- Grease. The city runs a Fats, Oils and Grease programme covering more than 3,000 food establishments, and states plainly that grease blockages are a primary cause of sanitary sewer overflows. The same chemistry works on a residential line, slower.
The consent decree, dated because it has to be
The city negotiated a consent decree with the Environmental Protection Agency, the Tennessee Department of Environment and Conservation, the Department of Justice and the Tennessee Clean Waters Network, effective 20 September 2012, to reduce sanitary sewer overflows. The delivery vehicle is the Sewer Assessment and Rehabilitation Program, described as a ten year programme moving neighbourhood by neighbourhood until the entire sanitary system inside the city has been assessed.
Date that one carefully too. The city page we read in August 2026 still describes phase four as currently in progress and scheduled for completion in February 2017, which means the narrative has not been refreshed in years even though the programme is real and the decree is live. The decree date is solid. The phase status on that page is not, and we are not going to pretend otherwise. Our sewer line repair page covers what assessment work actually finds.
The Rulebook Nobody Shows Homeowners
Section 27 is written about your plumber, not about you
The MLGW Service Policy devotes a whole section to what plumbers may and may not do on the water system, and it is worth knowing because a contractor breaking these rules is not being efficient, they are creating a problem you will inherit.
Plumbers may not tamper with or move any water meter or water meter box. They must not leave a cut-off key in the box at any time, or leave the meter box open during or after repairs. When making customer repairs they must leave the water curb cock exactly as they found it unless MLGW has specifically authorised otherwise. Only MLGW may operate main line water valves.
The parts that change what a job costs
Several of these rules have money attached, and they are the reason a Memphis plumber who works this system regularly quotes differently from one who does not.
- Five feet of separation. MLGW requires the water trench from the property line to the water meter to be separated by at least five feet from any sewer trench, gas pipe or other trench. On a narrow lot that is a real constraint on where a new line can run, and it is not negotiable on site.
- Enough pipe to reach the curb. On a new address the plumbing contractor must install sufficient pipe to allow the meter to sit at the curb line, or another designated location, roughly in front of the premises served.
- One line per meter. A plumber may not run more than one service line from a meter without written permission from the supervisor of MLGW water engineering. Splitting a feed to a garage, a pool or a second structure is a question to ask before the trench is dug.
- Corner lots and multi-unit buildings. The plumber has to obtain instructions from MLGW on the proper meter location before installing anything.
- Forty-eight hours notice for concrete. When sidewalks or driveways are to be laid in front of a premises with water facilities in place, MLGW must be given at least forty-eight hours notice, and concrete forms must be set so the meter box grade is right. Skipping that produces a meter box at the wrong height under new concrete.
The pressure reducing valve, and a genuine difference between cities
The Service Policy tells contractors that information on the approximate working pressure at specific locations can be obtained from the MLGW water engineering department. That is a free call worth making before a repipe is sized, and very few homeowners know it exists.
On the valve itself, the policy requires a pressure reducing valve where local plumbing codes call for one, and then says something worth quoting: MLGW does not install or maintain these devices for the customer. That is the opposite of the arrangement on our Louisville page, where the utility installs a pressure reducing valve itself on a new service in a high pressure area. Same device, same purpose, and two utilities that draw the responsibility line in different places. If you moved here from a city that did it the other way, this is a thing to check rather than assume.
What a plumber memphis homeowners hire should already know
None of the material on this page is secret. All of it is published by MLGW or by the City of Memphis, and all of it is free to read. What it adds up to is a short list of things a competent local contractor should be able to answer without looking anything up, and a homeowner can use that list as a filter.
Where does your work start
The answer should be the outlet side of the meter, and the quote should not include anything upstream of it.
What is my line made of
Check the MLGW inventory map and the free test kit before paying anyone to guess.
Why do you want a softener
At 2.8 grains per gallon, the burden of proof sits with whoever is selling one.
Is this rain or is this my lateral
The systems are separate here, so wet weather backups point inward more than outward.
Have you asked for the working pressure
MLGW water engineering publishes that it can supply it by location.
Who is opening the meter box
Under the Service Policy, not your plumber, and not with a key left behind afterwards.
Our drain cleaning and emergency plumbing pages cover the work itself. This page is about the local rules the work happens inside.
Memphis Plumbing Questions, Answered From Published Sources
Everything below comes from MLGW or the City of Memphis. Where a source is vague or out of date, we say so rather than filling the gap.
MLGW’s water service lines page describes the water service line as a shared responsibility between MLGW and the homeowner without naming a split point. The MLGW 2025 Service Policy is more precise. Section 3.20 says MLGW installs the connection to its mains including the meter and the meter box, at or near the property line. Section 3.22 says the point of delivery is the outlet side of the meter, that customer piping begins there, and that the customer is responsible for installation and maintenance from that point into the premises. Confirm your own situation with MLGW before accepting a quote, because a specific property can have history a general policy does not describe.
There are two published dates and they are twenty years apart. MLGW stopped using lead service lines in the 1950s. Shelby County stopped allowing developer use of lead pipes in houses in 1973. So the utility side went lead free first and the private side kept going for two more decades. MLGW also states there is no detectable lead in Memphis source water and that it treats water with orthophosphate to coat pipes. If you want your own line identified, MLGW publishes a lead inventory map and offers a free test kit to customers in Memphis and Shelby County.
The published figures argue against it for most homes. MLGW’s 2025 water quality report puts average hardness at 48 parts per million, which is 2.8 grains per gallon, with the system range running from 0.8 to 8.8 grains per gallon. That is soft water, and limescale is a hard water problem. We are not going to tell you no household in Shelby County has a reason for treatment, because that depends on the individual property and on what you are trying to fix. We will say that anyone selling you one should be able to point at a number in that table and explain what they are changing.
Because the rain is getting into your line rather than into the public one. The City of Memphis maintains a storm sewer system completely separate from the sanitary sewage system, a decision it traces to the yellow fever era of the late 1800s. That removes the combined sewer surcharge explanation that applies in some other cities. What is left is groundwater entering through a cracked or open joint in your own lateral, roots that only choke the line when flow rises, or a settled low spot. A camera survey is the way that gets confirmed rather than guessed.
Not under the MLGW Service Policy. Section 27 states that plumbers may not tamper with or move any water meter or water meter box, must not leave a cut-off key in the box at any time, and must not leave the meter box open during or after repairs. It also says the water curb cock must be left as originally found after repairs unless MLGW specifically authorises otherwise, and that only authorised MLGW employees or agents may tap a main or make a connection ahead of the point of delivery. A contractor casual about these is a contractor creating a liability at your address.
No. The Service Policy requires a pressure reducing valve where local plumbing codes call for one, and states that MLGW does not install or maintain these devices for the customer. That is a real difference from the arrangement on our Louisville page, where the utility installs one itself on a new service in a high pressure area. The policy does say that information on the approximate working pressure at specific locations can be obtained from the MLGW water engineering department, which is a free call worth making before sizing a repipe or arguing about a fixture that keeps failing.
Yes. The City of Memphis states it negotiated a consent decree with the Environmental Protection Agency, the Tennessee Department of Environment and Conservation, the Department of Justice and the Tennessee Clean Waters Network, effective 20 September 2012, aimed at minimising sanitary sewer overflows, delivered through a ten year sewer assessment and rehabilitation programme working neighbourhood by neighbourhood. Note that the city page we read in August 2026 still describes phase four as in progress with a February 2017 completion date, so the schedule narrative on that page is out of date even though the decree itself is live.
More than people expect. MLGW reports average water temperature at 66 degrees Fahrenheit with a range of 63 to 71. Cold supply arriving that warm into a humid summer makes exposed pipe sweat, and condensation running down a line is regularly reported as a leak before anyone checks. It also means your water heater starts from a warm baseline, so slow hot water in Memphis is more often a failing element, a broken dip tube or sediment in the tank than genuine undersizing.
No, deliberately. Licensing, the Limited Licensed Plumber credential and its project value thresholds, and the freeze to boil water advisory mechanism are all covered on our Tennessee state page rather than repeated here. This page is about the things that are specific to Memphis and Shelby County: the MLGW ownership boundary, the two lead dates, the aquifer chemistry, the separated sewer system and the Service Policy rules that govern work on the water system.
Sources, dates and what we refused to state
The shared responsibility sentence, the 1950s MLGW lead cut-off, the 1973 Shelby County developer cut-off, orthophosphate treatment, replacement since 2012, the more than 11,000 lines inspected or replaced and the future-tense 2024 and 2025 pilot sentence all come from the MLGW water service lines page, read in August 2026.
Section 3.20 obligations, the section 3.22 point of delivery, section 27.1 authorisation, 27.2 meters, 27.3 the five foot trench separation, 27.4 the curb cock, 27.5 the cut-off key, 27.7 one line per meter, 27.8 sufficient piping and the working pressure enquiry, 27.9 corner lots and 27.11 the forty-eight hour concrete notice all come from the MLGW 2025 Service Policy.
The Memphis Sand Aquifer, the more than 142 wells, the ten pumping stations, hardness of 48 parts per million and 2.8 grains per gallon, pH 7.3, alkalinity 57 parts per million, phosphate 0.75 parts per million described as a corrosion control additive, water temperature 66 degrees, the 4.73 parts per billion lead result, the September 2024 inventory submission and the free lead kit line come from the MLGW 2025 annual water quality report.
The yellow fever origin of separated sewers, the storm and sanitary separation, over 3,000 miles of sanitary sewer, the four pipe materials, roughly 100 lift stations, the flood control assets, the Fats Oils and Grease programme and the consent decree effective 20 September 2012 come from the City of Memphis environmental engineering pages, read in August 2026.
Refused and left blank rather than estimated: the daily volume MLGW pumps from the aquifer, because the sentence carrying that figure in the report we extracted is missing its time unit and we will not supply one; who owns the sanitary sewer lateral in Memphis, because the city code is served through a viewer our tools cannot read and no city page we reached states it; every water and sewer rate; every repair, excavation, replacement or thawing price; the current status of the full line replacement pilot; and any count of remaining private lead or galvanized lines in Shelby County.
Two claims are dated rather than repeated as current: the MLGW pilot sentence written in the future tense about 2024 and 2025, and the city page describing sewer rehabilitation phase four as in progress with a February 2017 completion date. Both were live on those sites in August 2026 and both describe periods that have passed.
No third-party plumbing firm is named anywhere on this page. No office, address, crew, response time, guarantee or coverage claim of ours is stated for Memphis, and no testimonial or performance statistic appears above. Utility policies, consent decree schedules and code editions change. Confirm current requirements with Memphis Light, Gas and Water, the City of Memphis Public Works Division and the Tennessee Board for Licensing Contractors before relying on anything here.