Plumber Everett: One City, Two Sewer Systems, and the Half You Live On Decides
Most cities on this site have one sewer system and one set of rules. Everett has two. The north end of the city is on a combined sewer, where rain and sewage travel down the same pipe. The south end is separated, where they do not. The City says so plainly, and the difference is not a curiosity for engineers. It changes what a backup in your basement probably is, when it is most likely to happen, and what you can do in advance about it.
Bolted to that split is something we have not found on any other city page in this project: an ordinance under which whether or not you have a backwater prevention device installed changes how the City processes a sewage backup claim. Not whether the device is a good idea. How the claim is handled.
Everything below is what the City of Everett publishes, read in August 2026, with the sources named at the foot and the things we refused to state named beside them.
The fact that reorganises everything else
The City Says Its Collection System Is Divided Into Two Areas
The City states that the Everett wastewater collection system is divided into two areas, the north end combined sewer system and the south end separated sewer system. That single sentence is the most useful thing a household in this city can know before it ever calls anyone, because the two halves fail differently.
A combined sewer is designed to collect rainwater runoff, domestic sewage and industrial wastewater in the same pipe. Most of the time that works in the resident’s favour, because the runoff gets treated along with everything else. During heavy rainfall or snowmelt the volume can exceed what the system will carry, and the City is candid that the system is then designed to overflow rather than to back up indefinitely.
Those releases are the combined sewer overflows, and Everett has thirteen outfalls with a public real time monitoring map showing their current status. For a homeowner the practical reading is blunt. On the north end, a storm and a sewer problem are not two separate events that happened to coincide.
Why the construction dates are worth knowing
The City dates the north end combined system to a period largely running from 1890 to 1963, and describes what it was originally designed to carry: sewage, horse manure, street and rooftop runoff, and garbage from city streets, delivered to the nearest receiving water. Before 1960 it discharged to Port Gardner Bay and the Snohomish River through numerous outfalls without treatment at all.
A system of gravity sewers, lift stations, force mains and regulators was built in the early 1960s to intercept those outfalls and carry the flow to treatment. The City is precise about how that interception was sized: to take all of the dry weather flows and part of the stormwater runoff. Not all of it. Part of it.
That is the whole design logic of the north end in one line, and it explains why the overflow behaviour is a feature rather than a fault. It also tells you something about the housing stock sitting above those pipes. A property connected during that era is very unlikely to have original drainage in original condition, and on the private side of the connection nobody has been intercepting anything.
If you are trying to establish whether your own line is the problem or the public system is, that is a diagnostic question rather than a repair question, and it is worth resolving before anyone digs. Our sewer line repair page covers what a camera survey does and does not settle.
A claims regime, not a recommendation
The Backwater Device Rule Everett Wrote Into an Ordinance
Plenty of utilities suggest a backwater valve. Everett did something different. An ordinance enacted by the City Council in August 2014 concerns sewage and storm system surcharge and backup prevention claims, and it requires properties whose sewer connections are considered at risk for sewer backups to have backwater prevention devices installed. The City calls those properties designated connections.
Then comes the sentence that changes the calculation. The City states that the presence or absence of a backwater prevention device at a designated connection will affect how future sewage backup claims are processed, as specified in the ordinance. That converts a piece of hardware into a question about your position if the worst happens.
We are not going to tell you what the ordinance decides in any particular case, because that is exactly the kind of address specific and fact specific question only the City and the ordinance text can answer. What we will say is that finding out whether your connection is a designated one is a phone call, and it is a phone call worth making before a wet winter rather than after one.
- For backwater prevention devices located on your property, the City says you are responsible for inspection and maintenance during your period of ownership. That duty transfers with the house, and it does not pause because the device has never been needed.
- The City publishes a video specifically on how to maintain a backwater prevention valve, which tells you the maintenance is real work rather than a formality.
- The ordinance itself is published as a PDF and dates from August 2014, so anything you were told about Everett backups before then may predate the rule entirely.
- The programme is administered through Public Works under a Sewer and Drainage Maintenance Supervisor, which is the function to ask for rather than general utility billing.
- A device that exists but has seized is not obviously better than no device when someone later asks whether it was maintained. Inspection is the half people skip.
The Expensive Half of an Everett Utility Bill Is the Half That Carries Rain
The City publishes its 2026 residential rates, and the internal breakdown is more interesting than the total. For a single family customer on a three quarter inch meter, the charge per thirty days is $168.20, and that includes 5 CCF of water. The City notes that one CCF equals 748 gallons, and that consumption above the included 5 CCF is billed at $7.483 per CCF.
Split that $168.20 into its published parts and the shape of the city appears. Water and filtration is $37.42. Sewer and surface water is $126.78. A solid waste fee accounts for the remaining $4.00. The drainage side of the bill is more than three times the water side.
On a one inch meter the charge is $205.60 per thirty days including 10 CCF, and the difference from the smaller meter sits almost entirely in the water and filtration line, which rises to $74.82 while sewer and surface water stays at $126.78.
There is also a timing point the City goes out of its way to separate. A utility tax taking effect on 1 August 2026 is a city tax applied to utility bills, and the City states it is not connected to the costs of the capital projects that drove the 2025 to 2028 rate increase. Two different changes, arriving close together, and a bill that moves for both reasons at once is not evidence of a leak.
That last point matters more than it sounds. A bill that jumps for a tariff reason looks exactly like a bill that jumps for a plumbing reason, and the two get confused constantly. Our guide to the signs of a hidden water leak sets out what separates them.
The doctrine with a memorable name
Everett Calls Stormwater a Common Enemy, and Means It Legally
On private property drainage the City is unusually direct. Stormwater runoff, it says, is considered a common enemy, and everyone has the general right to protect their property from upstream flows. Then it immediately fences that right with three limits, and the fencing is the useful part.
You cannot block a natural drainage course. The water needs to leave your property in the same manner and amount as it did naturally before you changed anything. And above all else you must exercise due care to avoid unnecessary damage. Any regrade, any new hard surface, any French drain that solves your problem by relocating it, sits inside those three.
The City is equally clear about where its own involvement stops. Concerns with stormwater flow between neighbouring properties are a private issue and the City cannot intervene. It does maintain and inspect the publicly owned system, and it does review and permit development and land alteration, but the dispute at the fence line is not its to settle.
The part that catches downhill owners out
The City states that downstream property owners are generally responsible for receiving runoff from roads, culverts and other upstream property owners. That is not an intuitive rule for someone standing in a wet garden looking uphill, and it is worth understanding before money is spent on the assumption that somebody else is at fault.
Its practical advice runs the other way too. Uphill owners are asked to consider how their landscaping and grading could affect lower properties, and downhill owners are asked to recognise that water follows gravity. The City also puts real weight on maintenance that costs nothing: know where your stormwater system is, keep grates clear of leaves and debris, and keep driveway culverts clean, functional and correctly constructed.
Blocked grates are named specifically as a cause of localised flooding, and in a city with this much winter rain that is not a small point. It is also the cheapest intervention on this entire page.
A protection with a deadline inside it
The Extreme Heat Shutoff Moratorium, and the Trap at the End of It
Washington operates an extreme heat utility shutoff moratorium, and Everett publishes how it runs locally. The moratorium prevents utility shutoffs for nonpayment on any day for which the National Weather Service has issued a heat related alert, such as an excessive heat warning, a heat advisory or an excessive heat watch. It activates immediately on notification, and any scheduled water shutoffs are suspended for the duration of the alert.
Customers already suspended for nonpayment can request restoration by calling Utility Billing, by email, or by visiting the office in person during business hours. The City adds a procedural condition that is easy to miss: all requests to resume service need to be in writing, and it cites Everett Municipal Code 14.16.270 for that.
Then comes the part that decides what happens next. A customer reinstated because of a heat related alert can avoid immediate shutoff once the alert is lifted in one of two ways, and both have to happen before the alert lifts rather than after. Either pay the past due balance in full, or enter into a payment plan by contacting Utility Billing.
In other words the moratorium buys time, and the clock on using that time runs out at the same moment the weather does. That is worth knowing in advance, because the day an advisory is lifted is a bad day to discover it.
Most of the Water This City Treats Leaves the City
Everett owns and operates the Everett regional water system, and the scale of it is easy to miss from inside the city limits. The City reports that approximately 80 percent of the water produced at Everett’s Water Filtration Plant is delivered to wholesale customers outside those limits.
Its published authority is correspondingly broad: the construction, operation and maintenance of the collection, diversion, impoundment, transmission, treatment, storage and distribution facilities needed to convey a potable supply to the inhabitants of Everett and such surrounding areas as the City Council may determine. Its wholesale customers are separate public water systems in Snohomish County, and the City distinguishes direct wholesale customers, who buy from Everett, from indirect ones, who receive Everett water through a direct customer.
There is a discipline point buried in that structure, and it is worth stating because this project has run into it before. Being inside the Everett regional water system does not make a neighbouring city an Everett customer, and it certainly does not tell you which utility bills any particular address. Our Lynnwood page declined to name a water source for exactly this reason, and nothing here overturns that. What Everett publishes is its own side of the arrangement, not a directory of who buys what.
For the private pipe question, which is a genuinely different subject and one Washington cities answer in strikingly different ways, our Seattle page sets out the side sewer position and Lynnwood splits the same pipe by the kind of work rather than by location. Everett is not a third variation on that theme and this page does not pretend otherwise.
Everett plumbing questions, answered from the City’s own pages
Seven questions where the Everett answer is genuinely different from the generic one, each traced to something the City of Everett publishes.
That is an address level question and the City is the place to settle it. What the City publishes is the principle: the wastewater collection system is divided into the north end combined sewer system and the south end separated sewer system. It also runs a real time monitoring page for the status of its thirteen combined sewer overflow outfalls. If you are in the older northern part of the city, treat heavy rain as relevant to your drains until you have confirmed otherwise.
It means the mechanism is different, and that is why the City wrote a backwater ordinance. In a combined system, storm flow and sewage share capacity, so the same downpour that overwhelms a street drain is loading the pipe your house connects to. The City’s own framing is that the system is designed to overflow at its outfalls when capacity is exceeded, which is precisely the condition under which a property with a vulnerable connection is most exposed.
It is the City’s term, from the August 2014 ordinance, for a property whose sewer connection is considered at risk for sewer backups. Designated connections are required to have backwater prevention devices installed. The reason to find out whether yours is one is not the installation cost. It is that the City states the presence or absence of a device at a designated connection affects how a future sewage backup claim is processed.
You do. The City is explicit that for backwater prevention devices located on your property, the owner is responsible for inspection and maintenance during their period of ownership, and it publishes a video on how to maintain one. Buying a house does not reset that duty, and it is worth asking during a purchase whether a device exists, where it is, and when it was last opened and checked.
Because it is not only sewer. The City’s 2026 breakdown for a single family customer on a three quarter inch meter shows water and filtration at $37.42 and sewer and surface water combined at $126.78, out of a $168.20 charge per thirty days that includes 5 CCF. Surface water is drainage infrastructure, and in a city with a combined system in its northern half and a large stormwater programme in general, that is where the money goes.
On its published position, no. The City states that concerns with stormwater flow between neighbouring properties are a private issue and that it cannot intervene. It does set out the limits that apply to whoever made the change: a natural drainage course cannot be blocked, water must leave in the same manner and amount as it naturally did, and due care must be exercised to avoid unnecessary damage. It also notes that downstream owners are generally responsible for receiving upstream runoff.
Not for nonpayment on a day the National Weather Service has issued a heat related alert. Everett suspends scheduled water shutoffs for the duration of such an alert, and restores service on request, with all requests to resume service required in writing under Everett Municipal Code 14.16.270. The condition to watch is the exit: to avoid immediate shutoff when the alert lifts, the past due balance must be paid in full or a payment plan agreed with Utility Billing before the alert is lifted.
Sources, and what we refused to state
The two area division of the collection system, the definition and behaviour of a combined sewer, the thirteen outfalls and the real time monitoring page, the 1890 to 1963 construction period, the original design load, the pre 1960 untreated discharge, the early 1960s interceptor works and the fact that they were sized for all dry weather flow and only part of the stormwater runoff, and the discharge points at the Snohomish River and Port Gardner Bay, are all from the City Combined Sewer Overflows page.
The August 2014 ordinance, the term designated connection, the requirement for backwater prevention devices at at risk connections, the statement that presence or absence of a device affects how future sewage backup claims are processed, the owner maintenance and inspection duty and the maintenance video are from the City Backwater Prevention Device Rebate Program page.
The 2026 rate figures, the CCF conversion and the separation of the August 2026 utility tax from the 2025 to 2028 rate increase are from the City Rates 2026 page. The common enemy doctrine, the three limits on altering drainage, the private issue statement and the downstream responsibility point are from Private property drainage and flooding issues. The moratorium, the written request requirement and Everett Municipal Code 14.16.270 are from the Extreme heat utility shutoff ban page. The 80 percent wholesale figure, the published authority and the direct and indirect customer distinction are from Everett’s regional water system. All read in August 2026.
What we refused to state, and why. No boundary between the combined and separated halves, and no statement that any street, postcode or property is on one rather than the other. The City publishes the division as a fact about the system, not as a map we read, and guessing at it would be the one error that makes the rest of this page harmful rather than useful.
Nothing about what the 2014 ordinance decides in any individual claim. The page reports that the ordinance changes how claims are processed, which is what the City says, and stops there. We did not read the ordinance PDF and we are not going to characterise its operative provisions from a summary. No rebate amount, no eligibility test and no application process for the device programme, because no figure or procedure was read.
Everett publishes a backflow hazard prevention programme and we deliberately did not build it, because cross connection control is covered elsewhere on this site and a city page is not the place to restate it. For the same reason there is no household leak self test here: that is a single subject on this site and it lives on our leak detection page. No water quality, hardness, fluoride, lead or copper result for Everett or for any wholesale customer of its regional system.
No claim that any neighbouring city buys Everett water. Everett describes its wholesale arrangement in general terms and naming particular customers from that would be inference, not reporting.
No office, address, crew or response time of ours is stated for Everett. Utility rates, ordinances, municipal code provisions, moratorium terms and programme scope all change. Confirm current requirements with the City of Everett Public Works or Utility Billing before relying on anything here.