Ohio EPA's Experience with Harmful Algal Blooms

27 Pages·2016·4.34 MB·English

Ohio EPA’s Experience with
Harmful Algal Blooms at
Public Water Systems
Heather Raymond
Ohio EPA HAB Coordinator
4-27-16
Microcystins Occurrence
• Over 3500 source water samples have been collected
at Ohio public water systems
– Sampled 60% of all surface water systems
– 75% of sampled systems (n=72) detected
microcystins in their source water.
– 21% of total samples had microcystins
> 1.6 ug/L
– Maximum concentration
>20,000 ug/L (scum sample)
• Finished water microcystins
detections at 8 public water systems
– Advisories in 2013 & 2014
– 5 finished water detections in 2015: No advisories
• New Compliance Monitoring in 2016
Other Cyanotoxin Occurrence
• Saxitoxins were detected in 38% of public water system source
water samples.
• Finished water saxitoxins detections at 3 public water systems.
• Cylindrospermopsin was detected in less than 1% of public water
system source water samples (maximum concentration 0.11 ug/L).
• Anatoxin-a has not been detected in source water intake samples.
Some anatoxin-a detections at beaches, but at concentrations less
than drinking water threshold.
• No finished water cylindrospermopsin or anatoxin-a detections.
http://wwwapp.epa.ohio.gov/gis/mapportal/HAB_Monitoring.html
Weekly
Microcystins
Monitoring
Period
Microcyctins Concentrations at Cadiz Intake
on Tappan Lake (Raw Water)
14
12
)
L
/
g
u
( 10

n
o
i
t
a
r
t 8
n
e
c
n
o
C 6

s
n
i
t
s
y
c 4
o
r
c
i
M
2
0
4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 5
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
- - - - - - - - - - - - - - - - - - - - -
g g p p p p p t t t t v v v v c c c c c n
u u e e e e e c c c c o o o o e e e e e a
A A S S S S S O O O O N N N N D D D D D J
8- 5- 1- 8- 5- 2- 9- 6- 3- 0- 7- 3- 0- 7- 4- 1- 8- 5- 2- 9- 5-
1 2 1 2 2 1 2 2 1 1 2 1 2 2
William’s Reservoir
November, 2012
Microcystin
Concentration: 1400 ug/L
(ND)
ND= Not Detected (Concentration <0.25) Data Source: Oregon
2014 Microcys ns Concentra ons in

Toledo's Finished Drinking Water

3.00
Raw = 14 ug/L

2.50 2.50

)
L
/ 2.00
g
u
( 1.70
s
n 1.60

1.50 1.50
s
y
Raw > 50 ug/L
c
o
r
c 1.00
Mi 0.97

0.46
0.50
0.320 .350.33 0.30 0.37 0.40 0.36

(ND)0.00
m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m
p p p a a p a p p a p p a a p a p a p a p a p a p a p a p a p a p p a a p a p a p a p
0 0 0 0 0 0 0 0 0 0 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
3 3 1 0 0 0 1 0 0 3 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 0 0 0 0 0 0
1: 5: 1: 0: 4: 7: 3: 3: 9: 8: 1: 9: 9: 9: 9: 9: 9: 9: 9: 9: 9: 9: 9: 9: 9: 9: 9: 9: 9: 9: 9: 9: 4: 8: 9: 0: 9: 9: 9: 9: 9: 9: 9:
14 14 41 41 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 41 14 14 14 14 14 14 14
/1/ /1/ 1/1 2/1 /3/ /3/ /4/ /4/ /4/ /5/ /5/ /5/ /6/ /7/ /7/ /8/ /8/ /9/ /9/ 10/ 10/ 11/ 11/ 12/ 12/ 13/ 13/ 14/ 14/ 15/ 15/ 16/ 16/ 16/ 17/ 7/1 17/ 18/ 18/ 19/ 19/ 20/ 20/
8 8 8/ 8/ 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8/ 8/ 8/ 8/ 8/ 8/ 8/ 8/ 8/ 8/ 8/ 8/ 8/ 8/ 8/ 8/ /1 8/ 8/ 8/ 8/ 8/ 8/ 8/
8
ND= Not Detected (Concentration <0.30) Data Source: Toledo PWS
Maximum Microcystin Concentrations at Lake Erie
Public Water System Intakes (2010 to 2015)

n
o
100
i
t
a >50 >50 >50 >50
r
t
n
e
c
n
o ) 2010
C L
/
s g 10
2011
n u
i (
st r >5 >5
2012
y e
c t
o i
L
r 2013
c r
i e
M p
2014
1
s
r
e m
t 2015
a
a
W r
g
o

) r
d c
e i
M
t
a
0.1
e
Raw (Untr Toledo Oregon Carroll Township Ottawa County Lake Erie Utilities Put-in-Bay Kelleys Island Camp Patmos Marblehead Sandusky Huron Vermillion* Elyria Lorain Avon Lake Cleveland* ake County West Mentor Painesville Fairport Harbor Lake County East Ashtabula* Conneaut*
L
*microcystins were not detected above reporting level
of 0.30 ug/L at these locations