Bulgaria AQI Trends
Compare yearly air-quality direction, best years, worst years, and trend deltas. This pilot covers 14 eligible cities with OpenAQ-derived daily AQI history.
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Yearly EPA AQI trend
City analytics table
| City | Avg AQI | PM2.5 | Worst month | Trend | Coverage |
|---|---|---|---|---|---|
| Svishtov Veliko Tarnovo, Bulgaria | 162 | 107.7 ug/m3 | December | n/a | 363 days · 4 locations |
| Veliko Tarnovo Veliko Tarnovo, Bulgaria | 97 | 33.0 ug/m3 | December | n/a | 79 days · 1 locations |
| Razgrad Razgrad, Bulgaria | 64 | 17.8 ug/m3 | November | n/a | 41 days · 1 locations |
| Velingrad Pazardzhik, Bulgaria | 60 | 15.4 ug/m3 | December | n/a | 357 days · 2 locations |
| Botevgrad Sofia, Bulgaria | 58 | 14.9 ug/m3 | December | n/a | 363 days · 4 locations |
| Ruse Ruse, Bulgaria | 57 | 15.1 ug/m3 | November | n/a | 352 days · 2 locations |
| Targovishte Targovishte, Bulgaria | 57 | 14.8 ug/m3 | November | n/a | 236 days · 2 locations |
| Plovdiv Plovdiv, Bulgaria | 55 | 14.7 ug/m3 | January | n/a | 367 days · 5 locations |
| Lom Montana, Bulgaria | 55 | 13.7 ug/m3 | November | n/a | 165 days · 1 locations |
| Sevlievo Gabrovo, Bulgaria | 52 | 13.2 ug/m3 | January | n/a | 363 days · 9 locations |
| Svilengrad Haskovo, Bulgaria | 52 | 13.6 ug/m3 | January | n/a | 363 days · 3 locations |
| Varna Varna, Bulgaria | 52 | 11.9 ug/m3 | November | n/a | 160 days · 2 locations |
| Dupnitsa Kyustendil, Bulgaria | 51 | 12.5 ug/m3 | January | n/a | 363 days · 4 locations |
| Haskovo Haskovo, Bulgaria | 51 | 13.0 ug/m3 | January | n/a | 363 days · 6 locations |
| Sofia Sofia City, Bulgaria | 51 | 12.4 ug/m3 | January | n/a | 367 days · 7 locations |
| Pleven Pleven, Bulgaria | 50 | 14.8 ug/m3 | January | n/a | 364 days · 2 locations |
| Devnya Varna, Bulgaria | 49 | 11.4 ug/m3 | January | n/a | 367 days · 4 locations |
| Momchilgrad Kardzhali, Bulgaria | 48 | 11.4 ug/m3 | January | n/a | 363 days · 2 locations |
| Dobrich Dobrich, Bulgaria | 45 | 10.4 ug/m3 | November | n/a | 366 days · 3 locations |
| Gabrovo Gabrovo, Bulgaria | 41 | 9.3 ug/m3 | January | n/a | 363 days · 19 locations |
| Dimitrovgrad Haskovo, Bulgaria | 37 | 8.4 ug/m3 | January | n/a | 367 days · 7 locations |
| Vratsa Vratsa, Bulgaria | 36 | 10.6 ug/m3 | November | n/a | 351 days · 4 locations |
| Sofia Sofia-Grad, Bulgaria | 31 | 48.1 ug/m3 | December | n/a | 341 days · 3 locations |
| Vidin Vidin, Bulgaria | 27 | n/a ug/m3 | January | n/a | 282 days · 1 locations |
| Gorna Oryahovitsa Veliko Tarnovo, Bulgaria | 23 | n/a ug/m3 | January | n/a | 318 days · 1 locations |
| Sliven Sliven, Bulgaria | 22 | n/a ug/m3 | March | n/a | 318 days · 1 locations |
| Shumen Shumen, Bulgaria | 21 | n/a ug/m3 | March | n/a | 294 days · 1 locations |
| Nesebar Burgas, Bulgaria | 20 | n/a ug/m3 | March | n/a | 316 days · 1 locations |
| Kardzhali Kardzhali, Bulgaria | 20 | n/a ug/m3 | March | n/a | 319 days · 1 locations |
| Pernik Pernik, Bulgaria | 18 | n/a ug/m3 | October | n/a | 269 days · 1 locations |
| Burgas Burgas, Bulgaria | 18 | n/a ug/m3 | July | n/a | 197 days · 2 locations |
| Stara Zagora Stara Zagora, Bulgaria | 18 | n/a ug/m3 | October | n/a | 75 days · 1 locations |
| Blagoevgrad Blagoevgrad, Bulgaria | 17 | n/a ug/m3 | January | n/a | 318 days · 1 locations |
| Lovech Lovech, Bulgaria | 16 | n/a ug/m3 | January | n/a | 316 days · 1 locations |
| Smolyan Smolyan, Bulgaria | 15 | n/a ug/m3 | November | n/a | 309 days · 2 locations |
Methodology
The extractor maps OpenAQ monitoring locations to the nearest AQI Now city in the same country, aggregates PM2.5 and PM10 to daily city averages, and converts those concentrations to US EPA AQI. Country tool pages use only city summaries that satisfy the configured minimum daily coverage threshold.
Bulgaria trends city pages
SvishtovAQI 162Veliko TarnovoAQI 97RazgradAQI 64VelingradAQI 60BotevgradAQI 58RuseAQI 57TargovishteAQI 57PlovdivAQI 55LomAQI 55SevlievoAQI 52SvilengradAQI 52VarnaAQI 52DupnitsaAQI 51HaskovoAQI 51SofiaAQI 51PlevenAQI 50DevnyaAQI 49MomchilgradAQI 48DobrichAQI 45GabrovoAQI 41DimitrovgradAQI 37VratsaAQI 36SofiaAQI 31VidinAQI 27