Environmental Cleanliness
A Cheap Thing to Neglect, Powerfully Felt
Why it matters. Environmental cleanliness is cheap to deliver and expensive to ignore. States with high scores have invested in waste management infrastructure; the gains are felt immediately by citizens and investors alike.
National best (Gombe)
4.10
2nd: Abia
Lowest: Kogi
1.90
3rd: Ekiti
National median
2.81
Is better
States scored
31
States unscored
Leading States
Trailing States
The story in the numbers
Environmental cleanliness scores are the fastest-moving in the index — states that intervene see results within 12 months. The report identifies the specific programmes behind the fastest improvers.
Inside the full report
Five parts. The whole federation.
The National Ranking
The complete ranking of every state on environmental cleanliness, with citizen scores and sample sizes.
Three-Year Trends
How the picture moved across 2024–2026, and the zones improving fastest — and slipping.
The Regional Picture
Where the parameter is strongest and weakest by geopolitical zone, and what explains the pattern.
The Leaders' Playbook
The state initiatives behind the strongest results — verifiable, specific, and adaptable.
What to Do Next
What the evidence means for governments, partners and investors — anchored in global best practice.
A taste of the findings
"Gombe's #1 ranking on environmental cleanliness is driven by a mandatory ward-level sanitation programme launched in 2023 — the cheapest intervention in the index with the highest citizen satisfaction return."
Where the work remains
Industrial corridors in high-scoring states often show environmental degradation that citizen surveys do not capture.
The report flags the states where investor due diligence needs to go beyond the headline score.
Read the full parameter report