Post on 26-Dec-2015
New Wilmington Streams:Tainted Water
or Tainted Thinking?
A Presentation by Westminster College’s
Limnology Class
A Preliminary Assessment:
Health in Aquatic Ecosystems
New Wilmington, Pennsylvania
From Webster's Dictionary:
Taint — to touch or affect slightly with something bad
And the potential sources of contamination
for our lakes and streams
Goals of our study
• Are Brittain Lake and Little Neshannock as polluted as some think?
• Is there contamination from the sewage treatment plant, livestock, and housing development?
What makes a healthy ecosystem?
• Healthy for humans
• We might wonder if humans are at risk due to the contamination
• Healthy for organisms
• Good conditions for one may be bad for another
All we can do is monitor the impact of human
activity
Assessing the health of an ecosystem
• Monitoring the chemical content
• Measuring biological parameters
But there are still differences in opinion . . .
How vulnerable is an area to contamination?
What should the guidelines be?
How much is permissible? or
Is NO contamination permissible?
We can monitor specific sites
May provide a warning of potential problems and the impact of outside sources.
Brittain Lake
Brittain Lake
McClure’s Run
McClure’s Run
LittleNeshannock CreekBefore Livestock
Route 208 Bridge
Before McClure’s Run
Confluence of McClure’s Run and Little Neshannock
Creek
BeforeSewage Pipe
Sewage Treatment Facility
After Sewage Pipe
CottageGrove
Water Sampling
pH
• Acidity of streams– decomposition– nutrient binding
Dissolved Oxygen
• Concentration not uniform– temperature– photosynthesis– respiration
• Affects organisms
Phosphate• Most limiting nutrient in fresh
water• Not toxic to humans or animals• Cycles• Sources and inputs
– erosion– waste water– storm water– runoff – feces
• EPA limits
Nitrate• Not found in influent • Found in effluent • Sources
– atmosphere– runoff– waste water– agricultural fertilizers
• Toxic to fetuses, infants and small children
• Public Health Systems limits
Methods
• pH, dissolved oxygen - meters
• phosphate and nitrate -spectrophotometer
Phosphate Analysis
Phosphate Analysis
Nitrate Analysis
Results• pH
• Dissolved oxygen
• Phosphate
• Nitrate
Average pH
7
7.5
8
8.5
9
9.5
Brittain Lake McClure's Run Before Livestock 208 Bridge BeforeMcClure's Run
Before SewagePipe
After SewagePipe
Cottage Grove
Ave
rage
pH
Poor
Fair
Good
Excellent
Average Dissolved Oxygen
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
16.00
BrittainLake
McClure'sRun
BeforeLivestock
208 Bridge BeforeMcClure's
Run
BeforeSew age
Pipe
AfterSew age
Pipe
CottageGrove
Aver
age
DO (m
g/L)
Good
Excellent
Correlation of Nitrate and PhosphateR2 = 0.6986
0.00
10.00
20.00
30.00
40.00
50.00
60.00
0.000 0.500 1.000 1.500 2.000 2.500 3.000 3.500 4.000 4.500 5.000
Phosphate (ppm)
Nitr
ate
(pp
m)
Amount of Phosphate per Day
0.000
0.500
1.000
1.500
2.000
2.500
3.000
3.500
4.000
4.500
5.000
9/15/98 9/22/98 9/29/98 10/6/98 10/13/98 10/20/98 10/27/98 11/3/98 11/10/98
Day
Pho
spha
te (p
pm)
Brittain Lake
McClure's Run
Cottage Grove
After Sewage Pipe
Before Sewage Pipe
Before McClure's Run
208 Bridge
Before Livestock
Phosphate Concentrations
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
1.60
BrittainLake
McClure'sRun
BeforeLivestock
208 Bridge BeforeMcClure's
BeforeSewage
Pipe
AfterSewage
Pipe
CottageGrove
Pho
spha
te (p
pm)
Good
Excellent
Amount of Nitrate per Day
0.00
10.00
20.00
30.00
40.00
50.00
60.00
Day
Nitr
ate
(pp
m)
Brittain Lake
McClure's Run
Cottage Grove
After the Sewage Pipe
Before the Sewage Pipe
Before McClure's Run
208 Bridge
Before Livestock
Nitrate Concentrations
0.000
5.000
10.000
15.000
20.000
25.000
30.000
Brittain Lake McClure's Run Before Livestock 208 Bridge Before McClure's Before SewagePipe
After SewagePipe
Cottage Grove
Nitr
ate
(ppm
)
Excellent
Good
Fair
Poor
Conclusions
Site pH Dissolved Oxygen Phosphate NitrateBrittain Lake poor good excellent excellent
Conclusions
Site pH Dissolved Oxygen Phosphate NitrateMcClure's Run fair good excellent goodBefore Livestock good excellent excellent good208 Bridge fair excellent excellent goodBefore McClure's fair good excellent goodBefore Sewage Pipe good excellent excellent goodAfter Sewage Pipe good excellent good poorCottage Grove fair excellent excellent poor
Microbiological Monitoring
• Uses microorganisms to assess the quality of water
• Coliform bacteria used as indicator organisms of bacterial pathogens
• Two types of coliforms:– total coliforms– fecal coliforms
EPA Standards
Total coliforms are the standard for which potable and recreational water guidelines are based– 1 coliform/100mL permissible in
drinking water– 1000 coliforms/100mL permissible in
recreational water
• Fecal coliforms indicate fecal contamination and possible bacterial pathogens
• Fecal coliforms/Fecal streptococci ratio gives indication of the origin of fecal contamination
Methods
• Sterilize• Collect
• Membrane Filter Technique
KF Agar M-Endo Broth M-FC Broth
Fecal Streptococci Total Coliforms Fecal Coliforms
Results
• Total Coliforms• Fecal Coliforms• Fecal Streptococci• FC / FS Ratio
Total Coliform Bacteria
• All sites are NOT suitable for drinking (more than one coliform per 100 ml)
• Only Lake Brittain within
Recreational Limit (under 1000 coliforms per 100 ml)
Total Coliforms
0
1000
2000
3000
4000
5000
6000
7000
8000
BrittainLake
McClure'sRun
BeforeLivestock
208 Bridge BeforeMcClure's
Run
BeforeSewage
Pipe
AfterSewage
Pipe
CottageGrove
Ave
rag
e #
pe
r 10
0 m
l
Recreational limit
Testing 9/24
Site TCBrittain Lake 30
McClure's Run 1220Above Livestock 580
208 Bridge 7550Above McClure's Run 440
Above Pipe 400Below Pipe 850
Cottage Grove 2900
Fecal Coliform Bacteria
• All sites show contamination– possible presence of bacteria
pathogens
• Below the sewage treatment pipe extremely high on one test day– water cloudy, dark, and smelled
Fecal Coliforms
0
5000
10000
15000
20000
25000
Brittain Lake McClure'sRun
BeforeLivestock
208 Bridge BeforeMcClure's
Run
BeforeSewage
Pipe
AfterSewage
Pipe
CottageGrove
Ave
rag
e #
per
100
ml
Fecal Streptococci
• Numbers are less than FC• All sites indicate fecal
contamination at some time– Possible presence of bacteria
pathogens
• Below the sewage treatment plants was the highest
• Brittain Lake was the lowest
Fecal Streptococci
0.0
100.0
200.0
300.0
400.0
500.0
600.0
700.0
800.0
900.0
Brittain Lake McClure'sRun
BeforeLivestock
208 Bridge BeforeMcClure's
Run
BeforeSewagePipe
After SewagePipe
CottageGrove
Av
era
ge
# p
er
100m
l
FC/FS Ratio
• Ratio > 4 indicates possible human fecal contamination
• Ratio < 0.7 indicates animal origin• Below the sewage treatment pipe
the highest• McClure’s Run was also high• Ratios fluctuate daily
Ratio Fecal Coliform/Fecal Streptococci
0
5
10
15
20
25
BrittainLake
McClure'sRun
BeforeLivestock
208Bridge
BeforeMcClure's
Run
BeforeSewage
Pipe
AfterSewage
Pipe
CottageGrove
Ratio
Human waste origin
Testing 9/24
Site FC/FSBrittain Lake 2.50
McClure's Run 0.83Cottage Grove 4.32
After STP 122.46Before STP 4.95
Before McClure's Run 2.16Rt. 208 Bridge 6.23
Before Livestock 1.17
Biological Monitoring
The use of organisms to assess or monitor
environmental conditions
Macroinvertebrates for Biomonitoring
• Accurate indicators of polluted ecosystems
• Often inhabit bottom sediments• Very diverse organisms- reflect
changes in biodiversity• Insects, mollusks, crustaceans, and
worms
Macroinvertebrates for Biomonitoring
• Large distribution area• Variety of habitat• Primary food source• Long-lived• Easy to collect and identify
Methods• Surber sampling• Five samples per site• Approximately ten centimeters
taken in each sample• Stored in alcohol and rose bengal
(preserve and stain organisms)
Sieving Samples
Sorting Samples
Identification of Macroinvertebrates
Biological Indices• HBI (Hilsenhoff’s Biotic Index)
– uses tolerance values to indicate level of pollution
• Tolerance – 0-10 scale; 0 = intolerant, 10 =
tolerant
Modified Hilsenhoff Biotic Index
0
0.5
1
1.5
2
2.5
3
3.5
BrittainLake
McClure'sRun
BeforeLivestock
208 Bridge BeforeMcClure's
Run
BeforeSewage
Pipe
AfterSewage
Pipe
CottageGrove
8.0
- H
BI
Moderate Impact
Slight Impact
Biological Indices
• Percent Model Affinity (PMA)- – compares non-impacted community
of seven major types of organisms with the community being studied
Percent Model Affinity
0.0
10.0
20.0
30.0
40.0
50.0
60.0
BrittainLake
McClure'sRun
BeforeLivestock
208 Bridge BeforeMcClure's
Run
BeforeSewage
Pipe
AfterSewage
Pipe
CottageGrove
PM
A
Severe Impact
Moderate Impact
Slight Impact
Biological Indices
• EPT- measures number of Ephemeroptera (mayflies), Plecoptera (stoneflies), and Trichoptera (caddisflies) to determine water quality
• Mostly clean-water organisms = presence generally correlated with good water quality
EPT Organisms
Ephemeroptera Plecoptera Trichoptera
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
BrittainLake
McClure'sRun
BeforeLivestock
208 Bridge BeforeMcClure's
Run
BeforeSewage
Pipe
AfterSewage
Pipe
CottageGrove
EP
T
Fair
Good
Biological Indices
• Family Diversity- combines family richness with the community balance or evenness to determine condition of the community
• High Family Diversity = healthy, diverse communities
Family Diversity
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
BrittainLake
McClure'sRun
BeforeLivestock
208 Bridge BeforeMcClure's
Run
BeforeSewage
Pipe
AfterSewage
Pipe
CottageGrove
Div
ers
ity
Results-Macroinvertebrates
Brittain Lake • Lowest values of all sites, as expected
Effect of Livestock
• Data inconclusive
Effect of Sewage Pipe • Higher values below sewage pipe
indicates better environment for macroinvertebrates
Chironomids
• Non-biting midge fly
• 1/2 inch • Detritivores
Morphological Testing
• Deformities in mouthparts• Effect of chemical contaminants• Early indicator
Mounting
• Head Capsule
Mounting
• CMCP 9/9AF Medium
Chironomid Deformities
Normal
Chironomid Deformities
Class I• Slight
abnormalities
Chironomid Deformities
Class II• Extra teeth• Missing teeth• Fused teeth• Loss of
symmetry
Chironomid Deformities
Class III• Severe
abnormalities
Percent Deformity
• Number of chironomids with deformed teeth divided by the total number of chironomids that were sampled
Chironomid:Percent Deformity
0
10
20
30
40
50
60
70
BrittainLake
McClure'sRun
BeforeLivestock
208 Bridge BeforeMcClure's
Run
BeforeSewage
Pipe
AfterSewage
Pipe
CottageGrove
Perc
ent D
efor
mity
Clean Water
Fair
Poor
Toxic Score
• Different Deformities
Chironomid: Toxic Score
0
10
20
30
40
50
60
70
80
90
100
BrittainLake
McClure'sRun
BeforeLivestock
208 Bridge BeforeMcClure's
Run
BeforeSewage
Pipe
AfterSewage
Pipe
CottageGrove
Toxi
c Sc
ore
Clean Water
Fair
Conclusions: Lake Brittain
• Healthiest for humans• Good nutrient level: Nitrate, Phosphate• High dissolved oxygen level• Low chemical toxicity• Less suitable for macroinvertebrates
Sewage Treatment Plant Pipe
• Definite effect at this site• High coliform count
– bad for humans
• High nutrient level – good for organisms
Livestock
• More human fecal contamination • Inconclusive for organisms
Farm / Housing
• Increased levels of phosphate and nitrate
• Indicates high non-natural chemical levels– Agriculture
• More human fecal contamination
Further Studies
• More sites• More research into geographical
area• Greater diversity of organisms• Sediment testing• Heavy metals• Pesticides and herbicides
Acknowledgements• Ann Throckmorton, Ph.D.• Joe Balczon, Ph.D. • Suzanne Butch - Consumer’s Water Company• Population Ecology Class• Microbial Diversity Class • Fred Garret - New Wilmington Sewage
Treatment Facility • Borough of New Wilmington• US EPA• PA DEP