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Interactive Tool
MaP Score Lookup Tool
Search any toilet model to find its Maximum Performance (MaP) flush-test score, water efficiency, and how it compares.
About MaP Scores
- MaP (Maximum Performance) measures grams of solid waste cleared in a single flush
- Scores range from 250g (minimum) to 1000g (maximum)
- Developed by the Canadian National Research Council
- Higher score = stronger flush performance
250–499g
500–799g
800–1000g ★
FairGoodExcellent
What is a MaP score?
The Maximum Performance (MaP) test was developed by the Canadian National Research Council to give consumers an objective way to compare toilet flush performance. The test uses soybean paste media to simulate solid waste and measures how many grams a toilet can clear in a single flush.
MaP score ranges
| Score Range | Rating | What It Means |
|---|---|---|
| 800–1000g | ★ Excellent | Handles heavy use, very unlikely to clog |
| 500–799g | Good | Adequate for most households |
| 350–499g | Fair | May struggle with heavy loads |
| 250–349g | Minimum | Passes certification but limited capacity |
How to use the MaP Score Lookup
Type any toilet brand name, model name, or model number in the search box above. The tool searches our verified product database and shows you the MaP score, water efficiency, flush system type, and trapway size for each match.
Where do MaP scores come from?
MaP scores in our database come from two sources:
- map-testing.com — The official registry maintained by utilities and the Canadian National Research Council. These scores are independently verified.
- Manufacturer specifications — When a model is not listed on map-testing.com, we note this and use the manufacturer's claimed score with a disclosure.
We always note the source so you know whether a score is independently verified or manufacturer-claimed.
How we rank & our data sources
We do not run physical lab tests. Rankings are built from published, verifiable data and real owner feedback, never paid placement.
- MaP (Maximum Performance) flush scores
- EPA WaterSense certification & GPF ratings
- Manufacturer specifications (trapway size, flush-valve, rough-in)
- Verified owner reviews from Amazon, Home Depot & Lowe’s
Researched by admin · Last updated August 8, 2026 · Our review method
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