Lead Paint Risk Calculator
Build year to lead risk band and RRP action.
What it does
Lead paint hides in plain sight in older homes, dangerous only when disturbed into dust or chips. Build year predicts the odds: pre-war stock tests positive most, post-ban stock rarely. A calculator turns the year into a plan.
The tool above bands any build year into very likely, likely, possible, or unlikely, flags EPA RRP duties for pre-1978 homes, and names the next step. Testing still decides each wall; the band sets suspicion.
EPA lead pages anchor the facts: the 1978 residential ban, RRP certification for pre-1978 work, and sale-or-lease disclosure. HUD backs the same era-risk ladder from national surveys. Dust standards keep tightening, so check current numbers before work.
Treat pre-1978 paint as guilty until a lab says otherwise. Contain, mist, HEPA-vacuum, and keep kids and pregnancy clear until cleanup passes. Paperwork matters as much as plastic: disclose, log, and hire certified firms.
How to use
- Enter the year the home was built.
- Read the risk band for its era.
- Read whether EPA RRP applies.
- Test paint before disturbing it.
- Disclose known lead on sale or lease.
- Hire certified pros for pre-1978 work.
Formula
- year
- Year the home was built, 1700 to 2100.
Bands follow EPA/HUD survey findings: older stock tests positive most often, with risk falling toward the 1978 ban. Year bands guide suspicion only; certified testing decides any wall. RRP and disclosure duties key off 1978 regardless of band.
Worked example
Example: built 1955
1955 single-family home with original trim.
- House built in 1955.
- Band: 1940 to 1959 reads Likely.
- Pre-1978 triggers EPA RRP rules.
- Action: test before disturbing paint.
- Disclose known lead on sale or lease.
Reference table
| Era | Risk | Rule |
|---|---|---|
| Pre-1940 | Very likely | RRP + test |
| 1940 to 1959 | Likely | RRP + test |
| 1960 to 1977 | Possible | RRP + test |
| 1978 and later | Unlikely | Standard care |
Limits
- Suspicion only. Lab or XRF testing decides walls.
- Bands are national averages, not addresses.
- Dust standards update; confirm current figures.
- Legal duties need the actual rule text.
Common mistakes
- Dry-scraping pre-1978 paint.
- Skipping tests because paint looks fine.
- Forgetting disclosure on sale or lease.
- Hiring uncertified crews for RRP work.
- Letting kids near active work dust.
Try it yourself
Quick checks. Answers sit tucked under each question.
Risk for a 1925 home?
Pre-1940 reads Very likely. RRP applies; test before disturbing paint.
Risk for a 1995 home?
Post-1978 reads Unlikely with no RRP trigger; standard safe practices still apply.
Questions
Which homes have lead paint?
Pre-1978 homes may hold it; 1978 banned residential lead paint. Risk climbs with age: pre-1940 very likely, 1940s-50s likely, 1960s-77 possible. Only a lab test confirms a wall.
What is EPA RRP?
Renovation, Repair, and Painting: EPA certification, lead-safe practices, and cleaning verification for pros disturbing paint in pre-1978 homes and child facilities. DIYers should mimic the containment.
How is paint tested?
An EPA-recognized lab test of paint chips or an XRF inspection by a certified inspector or risk assessor. Hardware swabs screen; labs decide.
What if I am not sure?
Assume it and test first. Legal disclosure covers known lead on sale or lease of pre-1978 housing, and ignorance ends at the first lab report.
Where is the exposure risk highest?
Kids and pregnancy first: chips, dust from friction surfaces, and bare soil near drip lines. Wet-mop sills, fix friction rubs, and cover bare soil where children play.
How do I work safely around it?
Contain dust with plastic and tape, mist before scraping, HEPA-vacuum after, and keep children and pregnant people out until cleanup passes. Never dry-scrape or torch.