Environment & Air Quality

Representative AQI bands by district — IQAir-style seed data for civic awareness.

As of 2026-07-20T17:30:00+05:30 · Open-Meteo Air Quality (Colombo model + seed districts)

District	AQI	PM2.5	Band
Gampaha	65	19 µg/m³	Moderate
Jaffna	55	16 µg/m³	Moderate
Colombo	52	11.2 µg/m³	Moderate
Kalutara	52	14 µg/m³	Moderate
Kurunegala	50	13 µg/m³	Moderate
Kegalle	49	12 µg/m³	Good
Kandy	48	12 µg/m³	Good
Ratnapura	47	11 µg/m³	Good
Batticaloa	46	11 µg/m³	Good
Puttalam	45	11 µg/m³	Good
Galle	44	11 µg/m³	Good
Trincomalee	43	10 µg/m³	Good
Matale	42	10 µg/m³	Good
Ampara	41	10 µg/m³	Good
Matara	40	10 µg/m³	Good
Anuradhapura	39	9 µg/m³	Good
Vavuniya	38	9 µg/m³	Good
Polonnaruwa	37	9 µg/m³	Good
Hambantota	36	9 µg/m³	Good
Badulla	34	8 µg/m³	Good
Monaragala	33	8 µg/m³	Good
Kilinochchi	32	8 µg/m³	Good
Mannar	30	7 µg/m³	Good
Nuwara Eliya	28	6 µg/m³	Good
Mullaitivu	26	6 µg/m³	Good

Land Change Pulse

Stale

District greenery and built-up change since 2018 — a morning-sized land signal, not a satellite gallery.

As of 2026-07-18 · Lankawa Land Change Pulse · Methodology · Download CSV

National greenery index Δ: -4pts (2018→2024)
National built-up index Δ: +6pts (2018→2024)
Weekly NDVI anomaly: -0.40

Top greenery declines (2018→2024)

Monochrome export for press / Discord

Year compare

Toggle 2018 ↔ 2024 for greenery or built-up index rankings.

Interactive seed indices — not Survey Department land use.

Largest greenery declines

Largest built-up gains

Top NDVI stress districts

Gampaha-1.30
Colombo-1.20
Hambantota-1.20
Kalutara-1.15
Kurunegala-1.15

All districts — greenery & built-up
District	Greenery	Built-up
Gampaha	42→34 (-8)	38→48 (+10)
Colombo	28→22 (-6)	62→71 (+9)
Hambantota	58→52 (-6)	12→20 (+8)
Kalutara	55→50 (-5)	22→28 (+6)
Galle	60→55 (-5)	18→24 (+6)
Kurunegala	61→56 (-5)	14→20 (+6)
Puttalam	59→54 (-5)	13→19 (+6)
Ratnapura	73→68 (-5)	10→15 (+5)
Kandy	68→64 (-4)	16→21 (+5)
Nuwara Eliya	78→74 (-4)	8→11 (+3)
Matara	63→59 (-4)	14→19 (+5)
Batticaloa	64→60 (-4)	12→16 (+4)
Ampara	67→63 (-4)	10→14 (+4)
Trincomalee	65→61 (-4)	11→15 (+4)
Anuradhapura	69→65 (-4)	9→13 (+4)
Polonnaruwa	71→67 (-4)	8→12 (+4)
Monaragala	77→73 (-4)	6→9 (+3)
Kegalle	70→66 (-4)	11→15 (+4)
Matale	74→71 (-3)	10→13 (+3)
Vavuniya	72→69 (-3)	8→11 (+3)
Badulla	75→72 (-3)	9→12 (+3)
Jaffna	48→46 (-2)	20→24 (+4)
Kilinochchi	70→68 (-2)	6→8 (+2)
Mannar	66→64 (-2)	7→9 (+2)
Mullaitivu	76→74 (-2)	5→7 (+2)

Lankawa indices are our own district aggregation for civic pulse use. Research prior art: Team Watchdog satellite2024 (MIT). Not official Survey Department land use — do not treat as legal zoning.