The Lead and Copper Rule, for mobile home park owners

What the rule does, at a high level

The Lead and Copper Rule sets out how public water systems monitor for lead and copper that can dissolve from plumbing materials and service lines into drinking water at the tap. The rule uses an "action level" framework: if first-draw tap samples from a set of sites exceed the action level for lead or copper, the system has follow-up obligations, including more sampling, corrosion-control treatment review, public education, and sometimes service-line replacement.

The rule has been updated over time, including the Lead and Copper Rule Revisions (LCRR) and the proposed Lead and Copper Rule Improvements (LCRI). State implementation timelines and details vary. The U.S. EPA Lead and Copper Rule reference is a useful jumping-off point.

Why parks care

Many manufactured-home communities were built decades ago, sometimes with copper or galvanized service lines on park-owned infrastructure and a mix of plumbing materials inside individual homes. Even when the park is not the PWS — for example, master-meter parks that buy from a city — the park's distribution and on-pad plumbing can affect what comes out of a resident's tap. Buyers and lenders often ask whether the park has any history of lead or copper exceedances, what corrosion-control practices are in place, and whether a service-line inventory exists.

Records park owners commonly keep

• Sampling site plans. Which homes or taps are in the sample pool and why.
• Tap sample results. Lab reports with chain-of-custody, organized by sampling round.
• Service-line inventory. A list of service-line materials by address, with the basis for each call (historical records, visual inspection, predictive modeling, or excavation).
• Corrosion-control evidence. Treatment used, dosing records, and any optimization studies.
• Public education notices. Language used, posting and delivery proof, dates, and any required follow-up.
• Regulator correspondence. State primacy letters on monitoring schedule, exceedances, or corrective actions.
• Resident concerns and complaints. Any concerns related to taste, plumbing materials, or staining, and the actions taken.

A binder approach — see our public water system binder overview — lets you produce these records on request without scrambling.

A common misconception

Lead is not added to drinking water at the source; it generally enters water through corrosion of plumbing materials that contain lead. That is why sampling under the rule happens at the tap, why service-line material matters, and why parks often need records that cut across the well, the distribution system, and the individual home plumbing. The fact that water leaves a treatment plant clean does not mean every tap is.

What to check with your operator and lab

• Your park's current LCR monitoring schedule and the last several sample rounds.
• The status of your service-line inventory and the date of the last update.
• What corrosion-control treatment you have, if any, and how dosing is documented.
• Whether any public education notices have been issued in the last five years.
• What your state primacy agency expects from a park of your size in the next reporting cycle.

Related reading

• What is a public water system?
• Documenting resident water complaints
• Water due diligence for parks

ParkWaterBinder is not legal, engineering, or regulatory advice. Use it to organize records, identify missing evidence, and prepare questions for qualified professionals and regulators. Check with your operator, lab, and state primacy agency for park-specific requirements.