Is Your Utility Ready for the LCRI? Lessons from Illinois's Early Experience
Illinois enacted the Lead Service Line Replacement and Notification Act (LSLRNA) in January 2022, requiring complete material inventories by April 2024, six months ahead of the Lead and Copper Rule Improvements (LCRI) deadlines. This state-level initiative put Illinois utilities on an accelerated timeline, making them early adopters of the comprehensive inventory requirements that utilities nationwide will soon face.
As Chicago’s former Commissioner for the Department of Water Management, Andrea Cheng, PhD, PE, managed the nation’s largest voluntary lead sampling program and launched a nationally recognized, equity-focused service line replacement initiative. Andrea shares lessons about sampling, outreach, data, and more from Illinois for utilities gearing up to meet the LCRI.

Understanding new sampling requirements
1. No more unknowns allowed
Systems with known lead or galvanized service lines must return to standard monitoring with larger sample pool sizes every six months. Most importantly, under LCRI unknown service line materials are no longer allowed in sampling pools for tiers 1-4.
2. Fifth liter sampling
In addition to the traditional first-draw sample, utilities need to collect a fifth-liter sample and use the higher lead level of the two results under LCRI. This creates new challenges for resident instruction and participation.
"Residents who used to just fill one bottle—pretty simple to explain—now have to fill five bottles, and it can be confusing that we’re not even analyzing the middle three," Andrea says, emphasizing the need for crystal clear sampling instructions.

The reality of resident outreach
With only three business days to report results, utilities need email addresses and phone numbers, not just mailing addresses. Traditional mail isn’t going to meet the new timeline requirements.

Essential data collection beyond service lines
1. Premise plumbing materials
Systems need toidentify the plumbing materials inside homes, not just service line materials, for LCRI compliance sampling pools. This requires inspections or detailed surveys.
2. Filters and water treatment
Utilities need to know if residents have point-of-entry (POE) or point-of-use (POU) filters and water softeners because the EPA prefers sampling through untreated water for LCRI compliance sampling pools.
3. Building types
Single-family (SF) versus multifamily (MF) designation impactscompliance sampling tiers. "The intent with this is to determine if you’re sharing a service line and if people can reliably stagnate the water in that service line for six hours,” she says.
Practical implementation strategies
1. Leverage existing home visits
"If most utilities had known 10 years ago, they needed to get premise plumbing materials for compliance, they would have been conducting this while replacing water meters,” Andrea adds. Make the most of home visits to record data you might be missing in a unified system.
2. Prepare for survey challenges
Phone surveys can work, but they require some skill. Andrea recalls, "At in-person visits, I'd ask someone, 'Do you have a water softener?' And they'd say, 'Oh no, no, no.' Then I’d take a closer look and see something that looks like a water softener... so I'd ask, 'Do you add salt to any equipment in your house on a regular basis?' And they'd go, 'Oh yes, yes, yes!'"
The key to phone surveys is gauging whether residents truly understand your questions. They can reduce stress on residents, but you need to assess if they're giving you accurate information.

Strategic considerations
1. Coordinate between departments
"Your inventory staff and sampling compliance staff might be in separate departments, but communication between them is essential,” she notes. As inventory identification progresses, compliance sampling requirements may change.
2. Consider service line replacement timing
Finding lead lines during inventory updates can kick you into standard monitoring if you didn’t have lead indicated your inventory prior. You'll want to time your inventory work strategically based on how much replacement work you can realistically handle.
3. Retain reliable participants
According to Andrea, "Many utilities rely on retired employees for compliance samples. They'll let you into their homes, they get why the samples matter, and you can count on them." If existing sampling participants meet new requirements, keeping them is valuable.
Learn from Illinois: start early, gather good data, and build systems that handle the complexity
The LCRI requirements are complex but manageable with smart planning and realistic expectations. "Compliance sampling programs can bee expensive and cumbersome. If you don’t have large numbers of lead and galvanized lines and can remove lead and galvanized lines sooner in your system, it's going to save you money in the long run,” Andrea recommends.