Friends of the Shenandoah River

E. coli Testing Results for September 24, 2026

Final Set of E. coli Results for FOSR’s 2026 Summer Weekly E. coli Testing Program

⚠️KNOW BEFORE YOU GO! This Week’s E. coli Testing Results Are Now Available

The E. coli test results for water samples collected yesterday varied significantly across monitoring locations.  Elevated bacteria levels were widespread: every single county monitored (Clarke, Warren, Page, and Shenandoah) had at least one site exceeding the EPA’s recommended safety threshold for primary body-contact recreation (235 CFU/100 mL), accounting for 5 out of the 12 locations tested.

💙 🙏 Thank you to the Clarke County Board of Supervisors, Shenandoah Valley Electric Cooperative, CoBank, The Downstream Project, and everyone who supports our work! Please consider supporting FOSR’s mission and vital work year-round.

Clarke County

  • Main-stem Shenandoah River at Castleman’s Ferry PBL, Route 7 bridge (FC08): E. coli levels were measured at 410.6 MPN CFU/100 mL.

Warren County

  • Manassas Run (FW36): Located above the confluence with the Main-stem Shenandoah River, E. coli levels were measured at 435.2 MPN/100 mL.

  • Main-stem Shenandoah River at Morgan’s Ford PBL (FW35): Just downstream of the confluence with Manassas Run, E. coli levels were measured at 275.5 MPN CFU/100 mL.

Page County

  • Hawksbill Creek (FPHCTL): Located along the Luray-Hawksbill Greenway Trail downstream of the pedestrian bridge at the Town of Luray Pocket Park, E. coli levels were measured at 235.9 MPN CFU/100 mL.

Shenandoah County

  • North Fork Shenandoah River at Meem’s Bottom Covered Bridge (FSMB): E. coli levels were measured at 261.3 MPN CFU/100 mL.

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E. Coli Test results for September 25, 2026

These results provide a snapshot of the E. coli bacteria concentrations at the designated sites on the date, time, and under the conditions that the water samples were collected.

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Test Results Archive

Final Set of E. coli Results for FOSR’s 2026 Summer Weekly E. coli Testing Program

⚠️KNOW BEFORE YOU GO! This Week’s E. coli Testing Results Are Now Available The E. coli test results for water samples collected yesterday varied significantly across monitoring locations. Elevated bacteria levels were widespread: every single

Final Sample Collection Update

Today marks the final round of water sample collection for the Friends of the Shenandoah River’s 2026 KNOW BEFORE YOU GO! Summer Weekly E. coli Testing Program. 🧪💧 It feels as though the seasonal transition

Is your favorite River spot above the threshold?

KNOW BEFORE YOU GO! This Week’s E. coli Testing Results Are Now Available E. coli levels at two sites tested yesterday were above the recommended maximum threshold of 235 CFU/100mL for primary water recreation. Main-stem

⚠️KNOW BEFORE YOU GO! This Week’s E. coli Testing Results Are Now Available 🟢 Good news for the Main Stem, South Fork, and North Fork of the Shenandoah River: E. coli levels at all sites

⚠️ KNOW BEFORE YOU GO! Water Testing Update 💧 🧪 Today, our FOSR lab staff rolled up their sleeves and collected 10 water samples from testing sites across the area! 🔬 Samples have been processed

Cheers to river floats, hot dogs, and well-earned days off!

⚠️KNOW BEFORE YOU GO! This Week’s E. coli Testing Results Are Now Available First and foremost: Thank you to those who donated to support this program. Your generosity keeps this program flowing, and we’re deeply

Thinking about taking the family to the river this Labor Day weekend? 🌊 Concerned about potential exposure to E. coli bacteria? 🦠 OH YA, let’s check out the Friends of the Shenandoah River’s KNOW BEFORE

We need your support to keep monitoring through these crucial final weeks of summer.

⚠️KNOW BEFORE YOU GO! This Week’s E. coli Testing Results Are Now Available 🟢 The trend continues. E. coli levels at the sites tested yesterday on the Main Stem and South Fork of the Shenandoah

Cool Mornings, Hot Labor Day Ahead!

🌅 Dare I say it was a crisp 59°F when I headed down the road this morning to collect water samples for FOSR’s Know Before You Go! Summer Weekly E. coli Testing Program? While these

A chilly sart to the morning gave way to a warmer afternoon

⚠️KNOW BEFORE YOU GO! This Week’s E. coli Testing Results Are Now Available 🟢 Once again, good news for river lovers. The E. coli levels at all the River sites tested yesterday did not exceeded

Hazy, Warm, and Humid: Just Another Summer Day in Virginia

🛑 KNOW BEFORE YOU GO! This Week’s E. coli Testing Results Are Now Available Great news for river lovers and a warning for those heading into Hawksbill Creek at the Pocket Park! Here is what

Low Levels & High Temps: Fueling Algae and Aquatic Plant Growth

🛑 KNOW BEFORE YOU GO! This Week’s E. coli Testing Results Are Now Available Check the latest data before heading out on the water! 📉 🏞️Field Observations Most notable this week […]

Lined up and ready to Ride the River.

KNOW BEFORE YOU GO! Another week brings updated E. coli testing results for our monitoring sites. Check the latest data before heading out on the water! 📢 Important Program Update: Due to limited funding,

Six Sites Exceed E. coli Threshold

KNOW BEFORE YOU GO! The E. coli test results for water samples collected yesterday varied significantly across monitoring locations. Once again, elevated bacteria levels were widespread: every single county monitored (Clarke, Warren, Page, and

Planning to Cool off in the River to Beat the Heat?

🛑KNOW BEFORE YOU GO! Planning to hit the river to cool off from the summer heat? 🌡️ Before you pack up the family, inflate the tubes, grab your fishing gear 🎣, and load up the