Reston Association closed all 15 of its pools at noon on Friday after wildfire smoke from Canada pushed air quality to levels the organization called "unhealthy for everyone."

The closure falls during what is typically the final stretch of the Reston Swim Team Association's competitive season, which in past years has run through the end of July with children ages 5 to 18 racing across eight neighborhood pools. Lap swimmers, fitness classes and casual pool-goers lost access as well.

Reston Association posted the closure notice at 9:59 a.m. on its alert page, citing the health of staff and members. Eighteen minutes later, the organization issued a separate air quality advisory urging residents to limit time outdoors and move activities indoors.

The smoke drifted into the D.C. metro area overnight from hundreds of wildfires burning in Ontario and northern Minnesota, according to a Friday, July 17, Forbes report. By 6 a.m. that morning, Washington registered an Air Quality Index reading of 247, which falls in the Code Purple range (201–300) indicating health risks for everyone, the Washington Post reported. The smoke was covering northern Virginia as it moved southward. The National Weather Service issued air quality alerts for Virginia and 18 other states.

Reston Association's alert language, "unhealthy levels for everyone," aligns with Code Purple or higher on the AQI scale.

No reopening time has been announced. The Washington Post's forecast calls for thick smoke to gradually thin on Saturday, with a storm system that should wash particles from the air by late that day.

Residents can check conditions at AirNow.gov by entering their ZIP code. Virginia health authorities recommend wearing an N95 or KN95 mask for anyone who must spend extended time outdoors during unhealthy air quality conditions.