Volunteer Lake Assessment Program Individual Lake Reports
EASTMAN POND, GRANTHAM, NH
MORPHOMETRIC DATA
TROPHIC CLASSIFICATION
Watershed Area (Ac.): 4,907
Surface Area (Ac.):
335
Shore Length (m):
4,000
Max. Depth (m): 9.2
Mean Depth (m): 3
Volume (m³):
4,066,500
Flushing Rate (yr¹) 2.1
P Retention Coef: 0.61
Elevation (ft):
1095
Year
KNOWN EXOTIC SPECIES
Trophic class
1999
MESOTROPHIC
2009
MESOTROPHIC
The Waterbody Report Card tables are generated from the DRAFT 2014 305(b) report on the status of N.H. waters, and are based on data collected from 20042013. Detailed waterbody assessment and report card information can be found at www.des.nh.gov/organizations/divisions/water/wmb/swqa/index.htm
Designated Use
Parameter
Category
Comments
Aquatic Life
Phosphorus (Total)
Slightly Bad
The calculated median is from 5 or more samples and is > indicator and the chlorophyll a indicator is exceeded.
pH
Slightly Bad
>10% of samples exceed criteria by a small margin (minimum of 2 exceedances).
Oxygen, Dissolved
Very Good
There are a total of at least 10 samples with 0 exceedances of criteria.
Primary Contact Recreation
Dissolved oxygen satura Cautionary
There are < 10 samples with 1 exceedance of criteria. More data needed.
Chlorophyll-a
Slightly Bad
The calculated median is from 5 or more samples and is > indicator.
Escherichia coli
Good
There are geometric means and all geometric means are < geometric mean criteria; and there has been a single
sample exceedance.
Chlorophyll-a
Very Good
There are a total of at least 10 samples with 0 exceedances of indicator.
WATERSHED LAND USE SUMMARY
Fry, J., Xian, G., Jin, S., Dewitz, J., Homer, C., Yang, L., Barnes, C., Herold, N., and Wickham, J., 2011. Completion of the 2006 National Land Cover Database
for the Conterminous United States, PERS, Vol. 77(9):858-864. For larger image contact NHDES.
Land Cover Category
Land Cover Category
% Cover
Land Cover Category
% Cover
Open Water
7.93
Barren Land
0.03
Grassland/Herbaceous
0.07
Developed-Open Space
5.02
4.45
Deciduous Forest
25.34
13.13
Pasture Hay
1.85
0.01
Developed-Low Intensity
Developed-Medium Intensity
Developed-High Intensity
% Cover
0.22
Evergreen Forest
Mixed Forest
0
Shrub-Scrub
37.64
Cultivated Crops
Woody Wetlands
1.01
Emergent Wetlands
3
0.28
Volunteer Lake Assessment Program Individual Lake reports
Eastman Pond, Grantham
4 Data Summary
Observations and Recommendations Refer to Ta le 1 and Histori al Deep Spot Data
Graphi s)
 Chlorophyll-a: Chlo oph ll le els i eased f o Ju e to Jul a d August, a d the
de eased i Septe e . O e all, hlo oph ll le els e e slightl ele ated i
a d
a e age le els e e g eate tha the state edia . Ho e e , histo i al t e d a al sis
i di ates sig ii a tl de easi g i p o i g hlo oph ll le els si e o ito i g ega .
 Conductivity/Chloride: Deep spot a d t i uta o du i it a d hlo ide le els
ge e all e ai ed ele ated a d g eate tha the state edia s. Histo i al t e d
a al sis i di ates sig ii a tl i easi g o se i g epili ei o du i it si e
o ito i g ega . Sp i g hlo ide o ito i g i di ated ele ated le els at No th Co e
East a d West Bks., a d Ta a i Bk. Chlo ide le els e eeded the h o i hlo ide
sta da d at Ta a i Bk. i Septe e .
 E. coli: E. oli le els at all staio s e e u h less tha the state sta da ds fo pu li
ea hes a d su fa e ate s.
 Total Phosphorus: Epili ei phospho us le els e ai ed sta le a d lo o ea h
sa pli g e e t. Septe e phospho us le els e e a o al fo this staio a d e
suspe t oss o ta i aio a d the data e e i alidated. Histo i al t e d a al sis
i di ates highl a ia le epili ei phospho us si e o ito i g ega . H poli ei
phospho us le els i eased g aduall f o Ju e to Sept. likel as a esult of
phospho us elease f o
oto sedi e ts u de a o i o diio s. T i uta
phospho us le els e e i a lo to a e age a ge ith the e epio of A de so Po d
Bk.
 Transparency: T a spa e
as slightl lo e i Jul a d August he algal g o th
as highe , a d a e age t a spa e
de eased slightl f o
. T a spa e
easu ed ith the ie s ope as ete tha that easu ed ithout o ea h sa pli g
e e t a d likel a ete ep ese taio of a tual o diio s. Histo i al t e d a al sis
i di ates elai el sta le t a spa e
si e o ito i g ega .
 Turbidity: Epili ei a d Metali ei tu idiies e e slightl a o e a e age due to
the ele ated algal g o th. H poli ei tu idit as ele ated i Septe e likel due
to the a u ulaio of o ga i o pou ds u de a o i o diio s. Ta a i Bk.
tu idit as ele ated i Jul a d Aug. likel due to the highe ta i o te t. Mill Po d
Bk. tu idit as slightl ele ated i Septe e a d it as oted that the ate as
loud . Sto e Bk. All othe t i uta tu idiies e e ge e all ithi a e age a ges
fo those staio s.
 pH: Epili ei pH as ithi desi a le a ge . - . u its ho e e Metali ei a d
H poli ei pH le els e e less tha desi a le. A de so Po d, No theast a d St oi g
Bks. also e hi it lo e pH le els.
 Recommended Actions: Edu ate the East a Co
u it o est a age e t
p a i es fo i te de-i i g o d i e a s a d alk a s. O tai a NH Volu ta Salt
Appli ato Li e se th ough UNH’s Te h olog T a sfe Ce te ’s G ee S o P o
Ce ii aio p og a . Mo e i fo aio a d edu aio al ate ials a e fou d at
.t .u h.edu/g ee -s o p o-t ai i g-a d- e ii aio . Co i ue sto
ate
a age e t a i iies i the ate shed a d keep up the g eat o k!
Staio Na e
Epili io
Metali io
H poli io
A de so Po d
East Co e Bea h
East Lake Bea h
East a B ook Outlet
Mill Po d B ook
No th Co e Bea h
No th Co e East B ook
No th Co e West B ook
No theast B ook
No theast Bk. Upst ea
S Co e I e Ha o B h
South Co e Bea h
Sto e Bk At Ro i La e
Sto e B ook
St oi g B ook
Ta a i B ook
West Co e A Bea h
West Co e B Bea h
West Co e C Lagoo
Ta le .
A e age Wate Qualit Data fo EASTMAN POND
Alk. Chlo -a Chlo ide Co d. E. Coli Total P T a s. Tu .
g/l ug/l
g/l uS/
#/
l ug/l
tu
NVS VS
.
.
.
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.
.
.
NH Media Values: Media alues fo spe ii pa a ete s
ge e ated f o histo i lake o ito i g data.
Alkali it : .
g/L
Chloroph ll-a: .
g/
Co du ivit : . uS/
Chloride:
g/L
Total Phosphorus: ug/L
Tra spare : .
pH: .
pH
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NH Water Qualit Sta dards: Nu e i
spe ii pa a ete s. Results e eedi g
o side ed a ate ualit iolaio .
Chloride: >
g/L h o i
E. oli: >
ts/
L – pu li ea h
E. oli: >
ts/
L – su fa e ate
Tur idit : > NTU a o e atu al le el
pH: et ee . - . u less atu all o
ite ia fo
ite ia a e
s
u i g
Historical Water Quality Trend Analysis
Para eter
Co du i it
pH epili io
Tre d
Wo se i g
Sta le
This epo t as ge e ated
E pla aio
Data sig ii a tl i easi g.
T e d ot sig ii a t; data highl
a ia le.
the NH DES Volu tee Lake Assess e t P og a
Para eter
Chlo oph ll-a
T a spa e
Phospho us epili
VLAP . Fo
o e i fo
io
aio
Tre d
I po i g
Sta le
Sta le
o ta t VLAP at
E pla aio
Data sig ii a tl de easi g.
T e d ot sig ii a t; data ode atel a ia le.
T e d ot sig ii a t; data highl a ia le.
-
o sa a.stei e @des. h.go