MORPHOMETRIC DATA

Flushing Rate (yr¹)

1,189,000

Fanwort

Variable Milfoil

1979

1988 MESOTROPHIC

EUTROPHIC

9

3.3

2,900

1.3Max. Depth (m):

Mean Depth (m):

Volume (m³):

Watershed Area (Ac.):

Shore Length (m):

ROBINSON POND, HUDSON, NH

TROPHIC CLASSIFICATION KNOWN EXOTIC SPECIES

Year Trophic class

Surface Area (Ac.): 88

Elevation (ft): 211

P Retention Coef: 0.68

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 2004-

2013. Detailed waterbody assessment and report card information can be found at www.des.nh.gov/organizations/divisions/water/wmb/swqa/index.htm

Volunteer Lake Assessment Program Individual Lake Reports

832

Designated Use Parameter Category Comments

Phosphorus (Total) Slightly BadAquatic Life Data exceed water quality standards or thresholds for this parameter by a small margin.

pH Slightly Bad Data periodically exceed water quality standards or thresholds for this parameter by a small margin.

Oxygen, Dissolved Encouraging Limited data for this parameter predicts water quality standards or thresholds are being met; however more data are

necessary to fully assess the parameter.

Dissolved oxygen satura Slightly Bad Data periodically exceed water quality standards or thresholds for this parameter by a small margin.

Chlorophyll-a Slightly Bad Data exceed water quality standards or thresholds for this parameter by a small margin.

Escherichia coli Slightly BadPrimary Contact Recreation Data periodically exceed water quality standards or thresholds for this parameter by a small margin.

Cyanobacteria hepatoto Slightly Bad Cyanobacteria bloom(s).

Chlorophyll-a Bad Data periodically exceed water quality standards or thresholds for this parameter by a large margin.

BEACH PRIMARY CONTACT ASSESSMENT STATUS

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.

Escherichia coli No Data No data for this parameter.ROBINSON POND - CAMP WINAHUPE BEACH

Escherichia coli Bad Data periodically exceed water quality standards or thresholds for this parameter by a large margin.ROBINSON POND - TOWN BEACH

Cyanobacteria Bad Cyanobacteria bloom(s). ROBINSON POND - TOWN BEACH

Land Cover Category % Cover Land Cover Category % Cover Land Cover Category % Cover

Open Water 8.96

Developed-Open Space 5.36

Developed-Low Intensity 9.13

Developed-Medium Intensity 4.33

Developed-High Intensity 0

Barren Land 0

Deciduous Forest 41.72

Evergreen Forest 15.64

Mixed Forest 0.64

Shrub-Scrub 3.66

Grassland/Herbaceous 2.54

Pasture Hay 2.24

Cultivated Crops 0.88

Woody Wetlands 2.29

Emergent Wetlands 2.63

This epo t as ge e ated the NH DES Volu tee Lake Assess e t P og a VLAP . Fo o e i fo aio o ta t VLAP at - o sa a.stei e @des. h.go

Observations Refer to Ta le 1 and Histori al Deep Spot Data Graphi s) Chlorophyll-a: Chlo oph ll le els e e slightl ele ated i Ju e, i eased to ele ated le els i Jul , de eased slightl i August, a d the i eased a k to ele ated le els i Septe e . The a e age hlo oph ll le el i eased slightl f o a d e ai ed u h g eate tha the state edia . Histo i al t e d a al sis i di ates elai el sta le hlo oph ll le els ith ode ate a ia ilit et ee ea s. Conductivity/Chloride: Deep spot a d t i uta o du i it a d hlo ide le els e ai ed ele ated a d u h g eate

tha the state edia s. T i uta hlo ide le els e e easu ed i Ma a d i di ate Sta. , a d ha e highe le els ith likel g eate i pa ts f o oad sali g. Histo i al t e d a al sis i di ates highl a ia le epili ei o du i it

le els si e o ito i g ega . E. coli: Sta. a d E. oli le els e e ele ated i Ma a d g eate tha the state sta da d of ts/ L fo su fa e ate s. Sa pli g as o du ted du i g a sho t ai e e t follo i g a lo g pe iod of d o diio s suggesi g ildlife as

a sou e. Total Phosphorus: Epili ei uppe ate la e phospho us as slightl a o e a e age i Ma a d Ju e, a d the de eased to a e age le els i Jul , August a d Septe e . A e age epili ei phospho us le el de eased f o ,

as the lo est easu ed si e , a d as slightl g eate tha the state edia . Histo i al t e d a al sis i di ates sta le epili ei phospho us le els si e o ito i g ega . Metali ei iddle ate la e phospho us le els e e a e age i Ma a d Septe e a d ele ated f o Ju e th ough August. H poli ei lo e ate la e phospho us le els e e a e age i Ma a d i eased to ele ated le els f o Ju e th ough Septe e as dissol ed o ge le els de eased a d phospho us t pi all ou d to oto sedi e ts as eleased i to the ate olu . T i uta sa pli g o u ed i Ma du i g lo / ode ate lo s a d a sho t ai e e t. Phospho us as ele ated i Staio s , ,

, , a d . Tu idit as also ele ated at Sta. , , , a d . Transparency: T a spa e easu ed ith VS a d ithout NVS the ie s ope lu tuated et ee . a d . ete s a d as lo est i Septe e he algal g o th as highest. A e age NVS t a spa e de eased slightl f o

a d as less tha the state edia . Histo i al t e d a al sis i di ates sig ii a tl de easi g o se i g t a spa e si e o ito i g ega . Turbidity: Epili ei tu idit as slightl ele ated i Ju e a d Septe e he algal g o th as ele ated. Metali ei tu idit as slightl ele ated o ea h sa pli g e e t, a d H poli ei tu idit as ele ated a d i eased as the su e p og essed due to the a u ulaio a d fo aio of o ga i o pou ds u de a o i o diio s. Sta. , , , a d tu idit le els e e ele ated i Ma du i g lo to ode ate lo s a d follo i g a

sig ii a t d pe iod. Volu tee oted sedi e t at Sta. a d othe sa ples a e i pa ted sedi e t, o ga i s a d/o i e al o te t du i g d eathe . pH: Epili ei , Metali ei , H poli ei , Staio s , a d e pe ie ed pH le els ithi the desi a le a ge . - . u its, ho e e deep spot pH le els ha e histo i all lu tuated a o e o elo the desi a le a ge. Sta. , a d pH le els e e slightl less tha desi a le. Histo i al t e d a al sis i di ates sta le epili ei pH le els si e o ito i g

ega .

Volunteer Lake Assessment Program Individual Lake Reports

Robinson Pond, Hudson

6 Data Summary

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: .

NH Water Qualit Sta dards: Nu e i ite ia fo spe ii pa a ete s. Results e eedi g ite ia a e 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 s

Tur idit : > NTU a o e atu al le el pH: et ee . - . u less atu all o u i g

Para eter Tre d E pla aio E pla aio Tre d Para eter

Chlo oph ll-a Sta le 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. Sta le Co du i it

T a spa e Wo se i g Data sig ii a tl de easi g. T e d ot sig ii a t; data sho lo a ia ilit . Sta le pH epili io

Phospho us epili io Sta le T e d ot sig ii a t; data sho lo a ia ilit .

Historical Water Quality Trend Analysis

Recommended Actions: The d ought o diio s i a d la k of sto ate u of a d t i uta lo likel o t i uted to the lo est easu ed epili ei phospho us le el si e . This highlights the i pa ts of ate shed de elop e t a d sto ate u of o t i uta a d lake phospho us le els. Edu ate lo al la ds api g o pa ies a d ho eo e ’s to use phosphate f ee fe ilize s o la s a d i ga de s as phospho us le els f o Staio s , a d i di ate ele ated phospho us f o eside ial a eas. I te al phospho us loadi g likel fuels a o a te ia g o th du i g the su e a d highlights the i po ta e of i i izi g e te al phospho us loadi g to the po d. A uai pla t a age e t a i iies a also p o ide i te al sou es of phospho us a d tu idit . De elop e t of a ate shed a age e t pla a help to esi ate phospho us loads f o dife e t sou es, ake e o e daio s o a age e t a io s to edu e loadi g, a d pote iall ga e g a t fu di g to i ple e t a age e t a io s. It is e o e ded to appl fo Se io G a t fu ds th ough the DES Wate shed Assista e Se io to de elop a ate shed a age e t pla to esto e i pai ed ate s. Keep

a e e out fo the a ou e e t of the g a t le i the fall of . Keep up the g eat o k!

Staio Na e Ta le . A e age Wate Qualit Data fo ROBINSON POND-HUDSON

Alk. Chlo -a Chlo ide Co d. E. Coli Total P T a s. Tu . pH

g/l ug/l g/l uS/ #/ l ug/l tu

NVS VS

Epili io . . . . . . .

Metali io . . .

H poli io . . .

Sta. Lau h B ook . . .

Sta. Ho a d B ook . . .

Sta. Ju ipe B ook . . .

Sta. Sto e La e D ai age . . .

Sta. Wood est B ook . . .

Sta. Ro . . .