Roaming Shores Lake Management Committee
2020 Algal Toxin and Bacteria Testing Program
Results for Week of 09/14/2020
| Microcystin Algal Toxin | E.coli Bacteria | |||
| West Beach 1 | East Beach 2 | West Beach 1* | East Beach 2* | |
| N/A | N/A | Results above early warning level | Results below early warning level | |
Please note that testing is conducted at the two beaches on Wednesday of the current week and thus results may not indicated the conditions on the lake at other locations or times.
A green cell indicates that most recent test results for bacteria or microcystin are below the USEPA or OhioEPA criteria for recreational water. A yellow cell indicates a bacteria or microcystin value that has exceeded the Advisory limit. A red cell indicates that the value for microcystin has exceeded the Elevated Advisory limit where contact with the lake should be avoided.
Summary Results for 2020
| Microcystin (ppb) | Bacteria (Beach Action Value) | ||||
| Week of | West Beach 1 | East Beach 2 | West Beach 1 | East Beach 2 | |
| 5/11/2020 | N/A | N/A | 8 | 30 | |
| 5/18/2020 | Not Detected | Not Detected | 280 | 130 | |
| 5/25/2020 | N/A | N/A | 330 | 10 | |
| 6/1/2020 | N/A | N/A | 490 | 30 | |
| 6/8/2020 | N/A | N/A | 290 | 30 | |
| 6/15/2020 | N/A | N/A | 90 | 10 | |
| 6/22/2020 | N/A | N/A | 490 | 40 | |
| 6/29/2020 | 1.118 | 2.073 | 80 | 130 | |
| 7/6/2020 | N/A | N/A | 150 | 10 | |
| 7/13/2020 | N/A | N/A | 2100 | 10 | |
| 7/22/2020 | 2.94 | 3.305 | 11,300 | 2400 | |
| 7/27/2020 | 9.86 | 7.99 | 200 | 100 | |
| 8/5/2020 | 9.09 | >50 | 11,400 | 200 | |
| #8/10/2020# | 7.065 | 5.320 | Not Tested | Not Tested | |
| 8/12/2020 | 5.04 | 5.09 | 400 | 10 | |
| 8/17/2020 | 1.77 | 4.82 | 152 | 7 | |
| 8/26/2020 | 1.75 | 1.52 | 2,300 | 5,600 | |
| 8/31/2020 | N/A | N/A | ??? | 300 | |
| 9/07/2020 | N/A | N/A | 400 | 300 | |
| 9/16/2020 | N/A | N/A | 500 | 40 | |
Note: N/A – not available ; testing not done during specified week
# – extra testing on 8/10 due to high toxin results the week before
Criteria for HAB Toxins (Tested Monthly). Currently, the 2016 State of Ohio Harmful Algal Bloom Response Strategy for Recreational Waters lists values above 6 ppb as a Public Health Advisory. Above 20 ppb, an Elevated Public Health Advisory is recommended and suggests that contact with the lake water should be avoided.
Further information can be viewed at the US EPA’s website for Cyanobacterial Harmful Algal Blooms. (www2.epa.gov/nutrient-policy-data/cyanobacterial-harmful-algal-blooms-cyanohabs#tab-7).
Criteria for Bacteria (Tested Weekly). Presence for bacteria is monitored by measuring the level of E.coli in the water at the two beaches as is done on most Ohio public beaches. The USEPA has issued a guidance document which includes a Beach Action Value (BAV) of 235 cfu/100mL. Should the level exceed this value, notifications should be posted. Heavy rain events are known to increase bacterial levels so caution is advised should this occur. Further information can be found on the EPA web site (https://www.epa.gov/wqc/microbial-pathogenrecreational-water-quality-criteria)
| Type of Advisory | Microcystin | Clylindrospermopsin | Saxitoxin |
| Recreational: Public Health Advisory | 6 | 5 | 0.8 |
| Recreational: No Contact | 20 | 20 | 3 |
| Drinking Water: Do Not Drink | 1 | 1 | 0.2 |
| Drinking Water: Do Not Use | 20 | 20 | 3 |
2019
| Microcystin (ppb) | Bacteria (Beach Action Value) | ||||
| Week of | West Beach 1 | East Beach 2 | West Beach 1 | East Beach 2 | |
| 5/13/2019 | N/A | N/A | 120 | 130 | |
| 5/20/2019 | N.D. (< 0.15) | N.D. (< 0.15) | 300 | 200 | |
| 5/27/2019 | N/A | N/A | 90 | 260 | |
| 6/3/2019 | N/A | N/A | 90 | 140 | |
| 6/10/2019 | N/A | N/A | 50 | 190 | |
| 6/17/2019 | N/A | N/A | 270 | 230 | |
| 6/24/2019 | 0.348 | 2.966 | 220 | 120 | |
| 7/1/2019 | N/A | N/A | 1730 | 37 | |
| 7/8/2019 | N/A | N/A | 50 | 90 | |
| 7/15/2019 | 3.693 | 2.266 | 620 | 540 | |
| 7/22/2019 | N.A | N.A. | 440 | 360 | |
| 7/29/2019 | 10.83 | 6.97 | 560 | 880 | |
| 8/5/2019 | 3.084 | 3.260 | 10000 | 1300 | |
| 8/12/2019 | 40.20 | 31.69 | 3900 | 2300 | |
| 8/19/2019 | 10.28 | 8.33 | 1700 | 600 | |
| 8/26/2019 | 5.49 | 11.60 | 5300 | 700 | |
| 9/2/2019 | 3.88 | 4.30 | 310 | 60 | |
| 9/9/2019 | 5.59 | 5.45 | 900 | 2700 | |
2018
| Microcystin (ppb) | Bacteria (Beach Action Value) | ||||
| Week of | West Beach 1 | East Beach 2 | West Beach 1 | East Beach 2 | |
| 5/7/2018 | N/A | N/A | 240 | 88 | |
| 5/14/2018 | N/A | N/A | 35 | 52 | |
| 5/21/2018 | < 0.15 | < 0.15 | 5 | 260 | |
| 5/28/2018 | N/A | N/A | 27 | 24 | |
| 6/4/2018 | N/A | N/A | 80 | 150 | |
| 6/11/2018 | N/A | N/A | 110 | 90 | |
| 6/18/2018 | 1.962 | 1.617 | 73 | 70 | |
| 6/25/2018 | N/A | N/A | 51 | 190 | |
| 7/2/2018 | N/A | 0.214 | 900 | 560 | |
| 7/9/2018 | N/A | N/A | 230 | 190 | |
| 7/16/2018 | 2.055 | 0.315 | 29 | 190 | |
| 7/23/2018 | N/A | N/A | 730 | 190 | |
| 7/30/2018 | <0.15 | 0.22 | 38 | 60 | |
| 8/6/2018 | N/A | N/A | 5,500 | 1,600 | |
| 8/13/2018 | 3.745 | 0.754 | 210 | 25 | |
| 8/20/2018 | N/A | N/A | 560 | 3,400 | |
| 8/27/2018 | 2.525 | 1.605 | 350 | 420 | |
| 9/03/2018 | N/A | N/A | 720 | 570 | |
| 9/10/2018 | N/A | N/A | 1,400 | 3,000 | |
| 9/17/2018 | N/A | N/A | 600 | 800 | |
2017
|
Microcystin (ppb) |
Bacteria (Beach Action Value) |
||||
| Week of | West Beach 1 | East Beach 2 | West Beach 1 | East Beach 2 | |
| 5/15/2017 | < 0.10 | < 0.10 | Below BAV | Below BAV | |
| 5/23/2017 | n/a | n/a | Below BAV | Below BAV | |
| 5/30/2017 | n/a | n/a | Below BAV | Below BAV | |
| 6/5/2017 | n/a | n/a | Below BAV | Below BAV | |
| 6/12/2017 | n/a | n/a | Below BAV | Below BAV | |
| 6/19/2017 | <0.10 | 0.160 | Below BAV | Below BAV | |
| 6/26/2017 | n/a | n/a | Below BAV | Below BAV | |
| 7/3/2017 | n/a | n/a | Below BAV | Below BAV | |
| 7/10/2017 | n/a | n/a | Below BAV | Below BAV | |
| 7/17/2017 | 1.610 | 0.769 | Below BAV | Below BAV | |
| 7/24/2017 | n/a | n/a | Below BAV | Below BAV | |
| 7/31/2017 | n/a | n/a | Below BAV | Below BAV | |
| 8/7/2017 | n/a | n/a | Above BAV | Below BAV | |
| 8/14/2017 | n/a | n/a | Below BAV | Below BAV | |
| 8/21/2017 | 42.0 | 40.2 | Below BAV | Below BAV | |
| 8/25/2017* | 14.64 | 11.44 | Below BAV | Below BAV | |
| 8/28/2017 | 2.92 | 6.59 | Below BAV | Below BAV | |
| 9/04/2017 | 2.20 | 4.09 | Below BAV | Below BAV | |
| 9/11/2017 | n/a | n/a | Below BAV | Below BAV | |
| 9/18/2017 | n/a | n/a | Below BAV | Below BAV | |
“*” – retested on Friday 8/25/17
2016
| Location | Date Sampled | Date Tested | Results parts /billion (ppb) | Toxin Tested |
| LRR – Beach 1 | 5/23/2016 | 5/23/2016 | 2.617 | Microcystin-LR |
| LRR – Beach 2 | 5/23/2016 | 5/23/2016 | 1.553 | Microcystin-LR |
| LRR – Beach 1 | 5/23/2016 | 5/23/2016 | <0.05 | Clylindrospermopsin |
| LRR – Beach 2 | 5/23/2016 | 5/23/2016 | <0.05 | Clylindrospermopsin |
| LRR – Beach 1 | 5/23/2016 | 5/23/2016 | <0.02 | Saxitoxin |
| LRR – Beach 2 | 5/23/2016 | 5/23/2016 | <0.02 | Saxitoxin |
| LRR – Beach 1 | 6/23/2016 | 6/23/2016 | <0.10 | Microcystin-LR |
| LRR – Beach 2 | 6/23/2016 | 6/23/2016 | <0.10 | Microcystin-LR |
| LRR – Beach 1 | 7/25/2016 | 7/25/2016 | 0.107 | Microcystin-LR |
| LRR – Beach 2 | 7/25/2016 | 7/25/2016 | <0.10 | Microcystin-LR |
| LRR – Beach 1 | 8/10/2016 | 8/10/2016 | <0.10 | Microcystin-LR |
| LRR – Beach 2 | 8/10/2016 | 8/10/2016 | <0.10 | Microcystin-LR |
2015
| Location | Date Sampled | Date Tested | Results parts /billion (ppb) | Toxin Tested |
| LRR – Beach 1 | 9/1/2015 | 9/1/2015 | 1.589 | microcystin |
| LRR – Beach 2 | 9/1/2015 | 9/1/2015 | 1.184 | microcystin |
| LRR – Beach 1 | 9/1/2015 | 9/1/2015 | <0.05 | clylindrospermopsin |
| LRR – Beach 2 | 9/1/2015 | 9/1/2015 | <0.05 | clylindrospermopsin |
| LRR – Beach 1 | 9/1/2015 | 9/1/2015 | <0.02 | saxitoxin |
| LRR – Beach 2 | 9/1/2015 | 9/1/2015 | <0.02 | saxitoxin |
| LRR – Beach 1 | 7/16/2015 | 7/16/2015 | 2.105 | microcystin |
| LRR – Beach 2 | 7/16/2015 | 7/16/2015 | 0.148 | microcystin |
| LRR – Beach 1 | 7/16/2015 | 7/16/2015 | <0.05 | clylindrospermopsin |
| LRR – Beach 2 | 7/16/2015 | 7/16/2015 | <0.05 | clylindrospermopsin |
| LRR – Beach 1 | 7/16/2015 | 7/16/2015 | <0.02 | saxitoxin |
| LRR – Beach 2 | 7/16/2015 | 7/16/2015 | <0.02 | saxitoxin |
| LRR – Beach 1 | 5/19/2015 | 5/19/2015 | <0.10 | microcystin |
| LRR – Beach 2 | 5/19/2015 | 5/19/2015 | <0.10 | microcystin |
| LRR – Beach 1 | 5/19/2015 | 5/19/2015 | <0.05 | clylindrospermopsin |
| LRR – Beach 2 | 5/19/2015 | 5/19/2015 | <0.05 | clylindrospermopsin |
| LRR – Beach 1 | 5/19/2015 | 5/19/2015 | <0.02 | saxitoxin |
| LRR – Beach 2 | 5/19/2015 | 5/19/2015 | <0.02 | saxitoxin |
2014
| Location | Date Sampled | Date Tested | Results parts /billion (ppb) | Toxin Tested |
| LRR – Beach 1 | 8/26/2014 | 8/26/2014 | 3.24 | microcystin |
| LRR – Beach 2 | 8/26/2014 | 8/26/2014 | 3.05 | microcystin |
| LRR – Beach 1 | 8/27/2014 | 8/28/2014 | <0.05 | clylindrospermopsin |
| LRR – Beach 2 | 8/27/2014 | 8/28/2014 | <0.05 | clylindrospermopsin |
| LRR – Beach 1 | 8/27/2014 | 8/28/2014 | 0.026 | saxitoxin |
| LRR – Beach 2 | 8/27/2014 | 8/28/2014 | <0.02 | saxitoxin |
| LRR – Beach 1 | 8/5/2014 | 8/6/2014 | 1.61 | microcystin |
| LRR – Beach 2 | 8/5/2014 | 8/6/2014 | 0.79 | microcystin |
| LRR – Beach 1 | 8/5/2014 | 8/6/2014 | <0.05 | clylindrospermopsin |
| LRR – Beach 2 | 8/5/2014 | 8/6/2014 | 0.075 | clylindrospermopsin |
| LRR – Beach 1 | 8/5/2014 | 8/6/2014 | 0.02 | saxitoxin |
| LRR – Beach 2 | 8/5/2014 | 8/6/2014 | <0.02 | saxitoxin |
| LRR – Beach 1 | 6/26/2014 | 6/27/2014 | 0.758 | microcystin |
| LRR – Beach 2 | 6/26/2014 | 6/27/2014 | 0.951 | microcystin |
| LRR – Beach 1 | 6/26/2014 | 6/27/2014 | <0.05 | clylindrospermopsin |
| LRR – Beach 2 | 6/26/2014 | 6/27/2014 | <0.05 | clylindrospermopsin |
| LRR – Beach 1 | 6/26/2014 | 6/27/2014 | 0.02 | saxitoxin |
| LRR – Beach 2 | 6/26/2014 | 6/27/2014 | <0.02 | saxitoxin |
| LRR – Beach 1 | 5/20/2014 | 5/21/2014 | <0.15 | microcystin |
| LRR – Beach 2 | 5/20/2014 | 5/21/2014 | <0.15 | microcystin |
| LRR – Beach 1 | 5/20/2014 | 5/21/2014 | 0.56 | clylindrospermopsin |
| LRR – Beach 2 | 5/20/2014 | 5/21/2014 | 0.30 | clylindrospermopsin |
| LRR – Beach 1 | 5/20/2014 | 5/21/2014 | <0.02 | saxitoxin |
| LRR – Beach 2 | 5/20/2014 | 5/21/2014 | <0.02 | saxitoxin |
