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Bacoor occupies a distinctive position within the Cavite province of the Philippines, situated on the southwestern shore of Manila Bay approximately 15 kilometers south of Metro Manila. This coastal municipality lies on the relatively flat alluvial plains of the Cavite lowlands, with elevations generally below 10 meters above sea level, creating minimal natural ventilation corridors. Its geography places it directly within the Manila Bay watershed and the greater Laguna de Bay basin, with the Bacoor River flowing through its urban core into the bay. This low-lying terrain, combined with proximity to the bay, contributes to humidity retention and occasional sea breeze patterns that can either disperse or trap pollutants depending on seasonal wind directions. Bacoor's urban character has transformed dramatically from agricultural and fishing communities into a densely populated residential city, now part of the continuous urban sprawl extending south from Metro Manila. This places it within the Calabarzon industrial corridor, with nearby industrial zones in Cavite Economic Zone and General Trias contributing to regional pollution. The city's location creates an urban-rural gradient where northern sections blend into Metro Manila's periphery while southern areas retain some agricultural pockets, though rapid urbanization has diminished green buffers. This geography specifically affects air quality through multiple mechanisms: coastal position brings marine influences that can dilute pollution but also contribute to salt aerosol formation; flat terrain inhibits pollutant dispersion during stagnant conditions; and its position downwind from Metro Manila during certain seasons means it receives transported pollutants from the national capital region.

Bacoor's air quality follows distinct seasonal patterns shaped by the Philippines' tropical monsoon climate, with pollution peaks typically occurring during the dry season from January to May. During the cool dry months of January to February, northeast monsoon (amihan) winds generally bring cleaner air from the Pacific, though temperature inversions can occasionally trap pollutants near the ground during early mornings. March to May represents the hot dry season when pollution typically peaks—high temperatures accelerate photochemical reactions creating ground-level ozone, while reduced rainfall allows particulate matter to accumulate. These months often see the poorest air quality, with sensitive groups advised to limit outdoor exertion during midday hours when ozone levels peak. The southwest monsoon (habagat) arrives from June to September, bringing substantial rainfall that naturally scrubs pollutants from the atmosphere, resulting in generally better air quality despite increased humidity. However, occasional stagnant periods between monsoon systems can briefly elevate pollution. October to December marks the transition back to northeast monsoon conditions, with improving air quality as winds shift and rainfall continues. Throughout the year, sea breeze patterns from Manila Bay provide some afternoon ventilation, though this effect diminishes during the dry season when wind speeds decrease. Sensitive groups including those with respiratory conditions, children, and older adults should be particularly cautious during the March-May peak pollution period, scheduling outdoor activities for early mornings when pollution levels are typically lower and avoiding areas near major roadways during rush hours.