Friends of the Shenandoah River

E. coli Testing Results for July 02, 2025

CODE RED for ALL Sites Tested
07.02.2024 FSMB North Fork Shenandoah River @ Meems Bottom covered bridge Shenandoah County VA MPN E. coli >2419.6 100mL sample

All four sites tested on the Shenandoah River Main-stem, along with three sites on the South Fork and three on the North Fork, had elevated E. coli levels exceeding the EPA’s recommended “do not exceed” Beach Action Value (BAV) of 235 CFU E. coli bacteria per 100 mL. This threshold serves as an early alert for freshwater recreators, including families with children.

In addition, the site on Hawksbill Creek (FPHCTL) in Page County recorded extremely elevated E. coli levels at 8,164.0 MPN/100 mL  E. coli levels in Manassas Run (FW36) in Warren County were also high, measuring 1,046.2 MPN/100 mL.

The following information is provided by the VA Department of Health (VDH):

During heavy rainfall and flooding, pollution and debris from the land washes into rivers, lakes and streams and eventually winds up in our coastal waterways. Pet, livestock, and wildlife wastes, as well as untreated wastewater from sewage treatment plants that are overloaded by an excess of rainwater, can all end up in natural waters used for recreation and pose risks to human health.

Recommendations by the VDH to stay safe, all Virginians should:

  • Avoid contact swimming in natural waterways for three days following rain events. Heavy rain picks up anything it comes in contact with, including germs from overflowing sewage, polluted storm water, and runoff from land.
  • Never swallow untreated water, and don’t swim if your skin has cuts or open wounds.
  • Wash hands frequently, including after swimming and before preparing and eating food.
  • Shower or bathe after swimming to wash off possible germs and contaminants.
  • Check the water and the area around it before swimming. Avoid going in water if there is a green film on the water or if the water is cloudier than usual. Avoid swimming near storm drains or livestock.
  • Avoid swimming if you are vomiting or have diarrhea.
  • Avoid any area where there is water with a foul or chemical odor, dead or dying fish, or discolored water.
  • If taking fish caught from natural waters, remove the skin from filets and dispose of viscera and internal organs. Cook filets to proper temperature and clean knives and cutting boards with soapy water. Follow posted fish consumption advisories.
  • Check with your healthcare provider before swimming in oceans, lakes, rivers, and other natural bodies of water if your body’s ability to fight germs is already affected by other health problems or medicines.

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E. Coli Test results for July 3, 2025

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

E. coli Results Tell a Mixed Tale Along the River: From Below Threshold to Concerning Levels

As the summer of 2025 comes to a close, Friends of the Shenandoah River (FOSR) has completed its final E. coli monitoring event for the season. Of the 14 sites tested on Thursday, September 18,

Did the Streak Continue For a Fourth Consecutive E. coli Testing Event?

Unfortunately, no, the E. coli level measured in the Shenandoah River at Lockes Landing public boat landing (site FC05) in Clarke County, VA was 248.1 MPN (most probable number) of colony-forming units per 100 mL

The Streak Continues: All River Sites Test Below E. coli Limit for Third Straight Time!

Great news heading into the holiday weekend, with no rain in the forecast, we’re hopeful that E. coli levels will stay consistent with yesterday’s results at the river sites we tested, which were all below

All River Sites Test Below E. coli Limit for Second Consecutive Time

Friends: This week’s testing results show the E. coli levels at all monitored sites, except one, were below the EPA’s recommended “do not exceed” threshold of 235 CFU per 100mL of water sample. As in

E. coli levels at all River sites below threshold

The E. coli levels at all the River sites and Manassas Run (FW36, Warren County VA) tested were below the EPA’s recommended “do not exceed” threshold of 235 CFU of E. coli bacteria per 100mL

Significant Change in E. coli Levels at Hawksbill Creek Site

In addition to lower water levels, mostly clearer conditions, and cooler temperatures this week, we observed a significant change in the E. coli level at our Hawksbill Creek site near the Luray-Hawksbill Greenway Pocket Park.

Good news! Our latest E. coli results show lower levels

While collecting water samples yesterday along the North Fork, South Fork, and Main-stem of the Shenandoah River, we couldn’t help but notice how many people were out enjoying the River! From fishing and kayaking to

“Flush” of pollutants from past weekend’s heavy rains continues to move downstream.

At only one River site this week, the northernmost testing site on the Main-stem Shenandoah River, FC08 Castleman’s Ferry public boat launch in Clarke County VA, the E. coli level of 365.4 CFU/100mL exceeded the

Heavy Rains May Affect Measured E. coli levels

Folks, the E. coli levels measured for the water samples collected and tested yesterday, July 16, may no longer represent current water quality. It is important to remember that the water quality results reflect E.

E. coli Levels Decrease, But Some Sites Still Elevated

There was a noticeable decrease in the E. coli levels at all of the sites monitored yesterday, Wednesday July 09, compared to a week ago. However, the E. coli level at three of the sites

CODE RED for ALL Sites Tested

All four sites tested on the Shenandoah River Main-stem, along with three sites on the South Fork and three on the North Fork, had elevated E. coli levels exceeding the EPA’s recommended “do not exceed”

Water levels at all the sites we tested have decreased since last week

The water levels at all the sites we tested have decreased since last week, additionally, at many of the sites the water was less turbid/muddy, improving the water’s clarity. In the midst of this recent

CODE RED DAY on the SHENANDOAH RIVER

Heads up, folks! The water sample results from yesterday’s testing are in — and it’s not good news Due to high levels of bacterial contamination from fecal matter at the majority of the sites tested

North Fork appeared significantly more turbid, higher E. coli levels than the South Fork

On June 11, 2025, while collecting water samples for Friends of the Shenandoah River’s summer E. coli testing program, we observed that the North Fork appeared significantly more turbid and had higher E. coli levels

Did you know your donation of any amount will help continue this testing program? https://fosr.org/donate/ Good news for the Shenandoah River sites we tested on June 4! All 13 public access sites showed E. coli