Wisconsin Dells posts lead service line inventory plan: what it means for your tap water

Wisconsin Dells is moving through a federal drinking-water compliance step that can affect how residents and renters hear from the utility about lead in tap water: the city has posted a lead service line inventory and improvement plan.

The Wisconsin Dells Water Department says it developed and maintains an inventory of service line materials required under the federal Lead and Copper Rule Revisions, with Wisconsin DNR technical assistance and Jacobs Engineering support. The posting is meant to document the inventory work and explain the next compliance actions that follow under the rule.

Why service line materials matter

The Wisconsin Department of Natural Resources describes the Lead and Copper Rule as a public health effort aimed at minimizing lead and copper levels in drinking water, noting that lead and copper enter drinking water mainly through the corrosion of service line pipes and plumbing materials.

Under the federal Lead and Copper Rule Revisions, Wisconsin public water systems are required to develop and submit a lead service line inventory to the Wisconsin DNR by Oct. 16, 2024. The state also notes that (separately) a lead action level exceedance can trigger other consumer-notification requirements after that date.

What Wisconsin Dells posted

On its notices page, the City of Wisconsin Dells Water Department says it partnered with Wisconsin DNR, which had Jacobs Engineering prepare the initial inventory report. The city posting links residents to the underlying technical plan prepared for Wisconsin Dells Waterworks.

In the Jacobs Engineering plan, the system is described as needing to develop and maintain an inventory of service line materials across its service area as required by the rule. The plan also spells out how the utility will classify service lines and what consumer-facing and public-access steps are expected during compliance.

What “lead service line inventory” means in plain language

In the Jacobs Engineering plan, the “inventory” is not just a guess based on the age of a home. It’s an organized record of what material exists in the service line from the water main (or well) to the building inlet—including portions that may be owned by the water system, portions typically owned by the property owner, and situations where ownership responsibility can be split.

The plan says the inventory must include all service lines within the service area, including service lines connected to vacant or abandoned lots or buildings (even if unoccupied and water service is turned off), and service lines connected to multiple units or buildings on a property.

The inventory categories: lead, GRR, and “unknown”

For each service line (or for the portion where ownership is split), the plan requires classification under the Lead and Copper Rule Revisions framework. In the Jacobs Engineering document, those categories include:

• Lead: any portion of pipe made of lead connecting the water main (or well) to the building inlet.
• GRR (galvanized requiring replacement): a galvanized service line that is (or was) downstream of a lead service line, or that is currently downstream of an unknown service line.
• Unknown: a service line where the material is not known to be lead, GRR, or non-lead because there’s no documented evidence supporting a material classification.
• Non-lead: a service line that is determined through an evidence-based record, method, or technique not to be lead or GRR.

The practical takeaway for residents and renters: “unknown” is not a label that says lead was found. It means the utility’s records and evidence used for the inventory don’t yet establish that the material is non-lead.

What residents should expect next

The Jacobs Engineering plan lays out two major reader-facing expectations tied to inventory compliance:

1) Public access to the inventory

After the initial inventory is submitted, the plan says the utility must make the inventory publicly accessible and provide verification to the DNR that the requirement was met. It also lists example ways public accessibility can be demonstrated, such as posting on the website, including notice in the water bill, displaying in a community location, or providing access upon request.

2) Written consumer notices for certain service line statuses

The plan also includes specific timelines for consumer outreach. It says Wisconsin Dells will send written consumer notices to consumers with lead, GRR, or unknown service line materials by Nov. 15, 2024 (and that notices must be provided within 30 days of submitting the initial inventory).

It also describes ongoing steps after the initial notices: beginning July 1, 2025, the utility must demonstrate delivery of consumer notifications and provide related materials to the DNR annually, including a “consumer confidence report” that includes instructions on how the public can access the inventory.

If you get a notice, don’t assume your line is already scheduled to be replaced

Nothing in the city posting or the inventory plan says that every address will move straight into construction immediately. What the documents do support is that the utility is building a compliance roadmap: categorizing service line material, making the inventory accessible, and sending required notices for properties connected to service lines identified as lead, GRR, or “unknown” based on the inventory evidence.

So if you receive a letter, the most accurate way to read it is as a cue to follow the instructions provided—confirm what the notice says your address’s service line status is in the inventory, and ask the water utility what the next steps are for your specific situation.

Bottom line

Wisconsin Dells has posted its lead service line inventory and improvement plan as part of federal compliance under the Lead and Copper Rule Revisions. The plan explains the service line material categories the inventory uses (lead, GRR, unknown, and non-lead), and it outlines the public-access and consumer-notification steps the utility is expected to complete—starting with the initial inventory submission by Oct. 16, 2024, followed by consumer notices and ongoing annual requirements.

Sources

• City of Wisconsin Dells — Water service line inventory development and improvement plan (notice page)
• Jacobs Engineering (for Wisconsin Dells Waterworks) — Wisconsin Dells waterworks inventory & improvement plan (PDF)
• U.S. EPA — Lead and Copper Rule implementation tools
• Wisconsin DNR — Lead & Copper Rule (state overview and timeline links)

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• Law firm Jacobs Injury Law, S.C. 133 Wisconsin Dells Pkwy, Wisconsin Dells, WI 53965