A plumber in Deerfield, and the rule under your basement
This village treats its own sewage and it polices what goes into the sanitary sewer. Tell us what is wrong and we pass it to a plumber licensed in Illinois.
The short version
A plumber in Deerfield works under a rule most neighboring towns do not push as hard. Rain water and ground water may not go into the sanitary sewer here, and the village fines by the day when they do.
There is a reason. Deerfield treats its own sewage at a plant it has owned and run from 1956, rather than sending it to the regional district that handles most of eastern Lake County. Storm water in the sanitary system ends up there. Its treated water goes back into the West Fork of the North Branch of the Chicago River, and the village sits between that fork and the Middle Fork.
We are not a plumbing contractor. You describe the problem once, and it goes to a plumber licensed in Illinois who covers Deerfield.
What a Deerfield plumber has to deal with
- The village treats its own waste.
Deerfield has owned and run its own wastewater plant, the Water Reclamation Facility, from 1956. Source for The village treats its own waste.
- Where the drinking water comes from.
Deerfield buys all of it from the City of Highland Park, which draws Lake Michigan water through a 54 inch intake a mile offshore. Source for Where the drinking water comes from.
- Hardness.
A 2024 sample put total hardness at 140 ppm as calcium carbonate. Water at that level scales a tank heater over years. Source for Hardness.
- Help with a lead service line.
The village cost share pays 50 percent of a full replacement, up to $6,000, or 50 percent of a private side only replacement, up to $2,500. The village maintains the line up to the buffalo box and you own it from there in. Funding is limited and first come, first served. Those were the terms as of September 2026, so confirm them. Source for Help with a lead service line.
- Where the village's sewer pipe stops.
The code puts all repair of the service line, including its connection to the public sewer, on the property owner. Source for Where the village's sewer pipe stops.
- The sump pump rule, and the fine.
It is unlawful to send storm water, rain water or ground water into a public sanitary sewer. Banned connections include downspouts, foundation drains, yard drains, diverter valves and unsealed sump pits. Each day one stays past notice carries a fine of $100 to $500. Source for The sump pump rule, and the fine.
- Flood levels, street by street.
At the river gauge on the West Fork, 17.5 feet threatens the village's own treatment plant and homes on Mallard Lane and Princeton Lane, and 18 feet threatens Hazel Avenue. The record crest is 16.84 feet, set on June 10, 1967. Source for Flood levels, street by street.
How the disconnection rebate works
Find out whether you have one.
An illegal connection is anything feeding rain or ground water into the sanitary sewer. A downspout tied into the house drain, a footing drain, a yard drain, an open sump pit.
Get the permit and the plan first.
The Residential Sump Pump Disconnection Program needs both through Community Development. Doing the work first can cost you the rebate.
Have a licensed plumber do it and certify it.
The village asks for a Certificate of Compliance from a licensed plumber. This is sump pump repair and repiping work.
Send the paid invoice and claim the 20 percent.
The village then pays back 20 percent of the cost. It calls the program limited time, so check it is still open.
The pipe going out is yours
The sewer lateral belongs to you end to end. The village can give written notice to repair it and shut the service off if it is not done inside a week. So a lateral that backs up every few months is not worth rodding forever. A camera down the line during sewer line repair and rodding tells you whether it is roots, a belly, or a break.
The night the pump matters
Deerfield got more than seven inches of rain over ten hours on July 12, 2017. The village opened sandbag distribution on Elm Street while power was out across about 450 homes.
If water is spreading and you cannot stop it, that is an emergency plumber call. Cut the power at the breaker only if the panel is dry and you can reach it safely. If you smell gas, leave the house and call North Shore Gas or 911 from outside. A slow drain unrelated to the storm is smaller, and drain cleaning handles it.
The work people ask us about
Pick the closest match, or write it in your own words.
- Emergency Plumber Burst pipes, sewer backups, and water you cannot stop.
- Sump Pump Repair and Installation Pumps that quit, run nonstop, or need a battery backup.
- Water Heater Repair and Installation No hot water, a leaking tank, or a move to tankless.
- Drain Cleaning Slow sinks, clogged tubs, and floor drains that back up.
- Sewer Line Repair and Rodding Root intrusion, camera inspections, and broken laterals.
- Water Softener Installation and Repair Hard water scale, salt problems, and new systems.
Questions Deerfield homeowners ask
Can I run my sump pump into the sanitary sewer?
No. Village code bans storm water, rain water and ground water from any public sanitary sewer, and an illegal connection must go within 180 days of notice. A new violation after a compliance certificate runs $250 to $500 a day.
Do I need a permit to replace a water heater in Deerfield?
Yes. The village says the contractor doing the work has to pull one. Its permit guide also lists plumbing fixture work, lead pipe replacement and meter replacement. A water heater repair that becomes a replacement crosses that line.
How do I find out if my line is lead?
The village publishes a water service material lookup, so you can check your property before paying anyone to dig. Homes built after 1960 are described by the village as less likely to have a lead line. Earlier homes often carry galvanized supply pipe and clay laterals too.
Does my plumber have to register with the village?
Yes, on top of the state license. Deerfield requires contractor registration for trades including plumbing. You can check the state license on the verification lookup.
What to tell us
-
Whether it only happens when it rains.
That points at the storm side and the pump rather than the plumbing.
-
Whether you have had a notice from the village.
A disconnection notice or a lead line letter changes the job.
-
Where the water is.
At a fixture, at the floor drain, at the heater, or up through the slab.
Other towns we cover
Deerfield's water comes from the plant up the road, so plumbers in Highland Park deal with the same chemistry. Lake Forest borders it to the north.
Storm coming and the pump untested?
Send the details. A person reads every request. If we cannot place it with a licensed plumber who covers Deerfield, we tell you.
If it is urgent, do not wait on us. Call a local licensed plumber directly.