Cofepris testing before winter break flagged six beaches over the enterococci limit, so they are not suitable for recreational swimming.
Ahead of the winter vacation period, Cofepris and Semarnat carried out a pre-season sampling of seawater quality at high-traffic beaches in Mexico’s main tourist destinations. The monitoring covered 289 beaches across 76 destinations in 17 coastal states, with 2,233 laboratory analyses taken in the weeks before the holiday travel surge.
The headline is mostly good news. The agencies reported that 283 of the 289 beaches met the microbiological standard used to protect swimmers. That leaves six beaches that did not meet the threshold and were classified as not suitable for recreational use.
Unsafe swimming beaches flagged for winter
Cofepris said these six sites exceeded the bacteria limit used for beach safety screening. The locations flagged as not suitable were Playa de Tijuana in Tijuana, Baja California; Playa Mismaloya in Puerto Vallarta, Jalisco; Playa El Veneno in Miramar and Playa San Francisco in San Carlos, both in Sonora; Playa Barra del Tordo in Aldama, Tamaulipas; and Playa José Martí along the Veracruz waterfront between Veracruz city and Boca del Río.
This is a seasonal snapshot, not a permanent label. Water quality can change quickly with rainfall, runoff, and local sanitation work. Still, the point of a pre-vacation warning is simple: if you were planning a winter dip at one of these beaches, pick another spot for now.
Why the standard matters
The agencies use enterococci bacteria as a key indicator for contamination risk in marine water. The benchmark commonly cited for recreational seawater is 200 enterococci per 100 milliliters. When a beach crosses that line, the concern is not abstract. Higher bacterial loads are linked to a greater chance of stomach illness and infections affecting skin, eyes, ears, and open cuts.
For expats, this matters because winter can feel like the “safe season,” especially compared with stormy months. But even in dry weather, a few local factors can push results the wrong way, including storm drains, wastewater discharges, areas with limited sewage infrastructure, and heavy crowding in peak periods.
A quick way to check your beach
If a beach day is part of your weekly routine, treat these reports like a weather check. Cofepris and Semarnat publish results through the Playas Mx app, which shows whether a beach is currently marked as suitable or not, based on the latest monitoring. If you see a warning and you still want the ocean, the safest move is usually to switch beaches rather than “swim around it,” especially if you have kids, a weakened immune system, or any skin breaks.
And if you notice obvious sewage odors, murky plumes near outfalls, or unusual debris after rain, trust your senses. The cleanest decision is often the one made before you step into the water.
