2016 Parameter Data: Total Phosphorus, River, Brook and Tributary Sites

In fresh water bodies, phosphorus is the nutrient that has the most influence on plant growth. Just parts per billion (ppb) increases are needed to stimulate the growth of algae. Measurement of total phosphorus includes readily available dissolved phosphorus, as well as particulate phosphorus and organic forms of phosphorus such as that making up algae. Phosphorus readily binds to lake sediments, but can be released back into the water column if there is no oxygen in the bottom waters of the lake, as can occur when lakes stratify in the summer. That process, known as internal phosphorus recycling, can cause late summer or early fall algae blooms when lakes destratify, or become well mixed in the fall. For more information on phosphorus, lake aging and how you slow it, see our factsheet at http://cels.uri.edu/docslink/ww/water-quality-factsheets/Phosphorus.pdf.

Watershed LOCATION MAY JUNE JULY AUG. SEPT. OCT. MEAN Code RIVERS - - (ug/l or ppb) - - A - 53 55 40 31 195 52 71 Belleville @ Railroad Crossing WD @ Rte 216 15 25 25 23 7 24 20 WD Beaver River @ Rte 138 10 6 LE 8 8 16 10 NA Buckeye Brook #1 @ Novelty Rd LE 43 44 48 26 15 35 NA Buckeye Brk #2 @ Lockwood Brk - 28 40 130 - - 66 NA Buckeye Brk #3 @ Warner Brook LE LE 191 43 25 - 86 NA Buckeye Brook #4 @ Mill Cove 33 23 166 60 26 - 62 WD Falls River D - Step Stone Falls 43 79 68 107 24 50 62 WD Falls River C - Austin Farm Rd. 31 64 34 34 13 33 35 WD Falls River A - Twin Bridges 26 68 24 19 9 25 29 WD Green Falls River @ Rte 184 (Exit 93) 10 23 11 8 13 16 13 A Himes River @ Hideaway Lane 12 - 18 12 <2 12 11 H HW1A - Scrabbletown Brk @ Falls 14 23 24 12 6 9 15 H HW1B - Scrabbletown @ Rt 4 Bridge 13 17 15 24 7 8 14 H HW #4 - Davis Memorial 10 - 23 - - - 17 H HW5 - Sandhill Brook (Saw Mill Inlet) 36 24 69 21 13 43 34 H HW6 - Hunt River @ Forge Rd. 15 46 27 - 12 17 23 TH - Upstream 25 28 LE 22 4 106 37 TH Moosup River A - Fairbanks 26 40 41 44 26 166 57 WD Pasquisett Brook @ Rte 2 LE 47 241 159 383 43 175 WD @ Rte 91 154 48 58 77 65 59 77 WD Pawcatuck River - Bradford 0.5m 25 31 23 19 27 24 25 WD Pawcatuck River - Upstr of Boombridge LE 72 79 20 36 42 50 PA upstream of Rhodes 33 82 130 56 30 110 74 WD Pendelton Hill Brk @ Grindstone Rd 11 15 34 22 - 16 20 WD Queen River @ Mail Rd 14 26 LE 12 12 23 17 WD Queen Tributary - Sherman Brk 9 <2 12 13 22 18 13

Limit of Detection = 4 ppb; Mean calculated using half the limit of detection (2 ppb) for < 4 LE = Lab error. Contamination was identified in the analytical process.

2016 2016 Parameter Data: Total Phosphorus, River, Brook and Tributary Sites

Watershed LOCATION MAY JUNE JULY AUG. SEPT. OCT. MEAN Code RIVERS (continued) - - (ug/l or ppb) - - WD Shickasheen Brook @ Rte 2 35 95 DRY DRY DRY DRY 65 WD Shickasheen Brk @ Miskiania Rd 16 30 38 78 19 13 32 WD Shickasheen Brk @ Barber P Outlet 20 16 12 8 14 13 14 WD Shickasheen Brook @ Rte 138 16 19 50 112 - 61 52 WD Shickasheen Brk @ Liberty Lane 11 32 18 LE 17 16 19 WD @ Hewitt 21 23 26 17 38 52 30 TE White Horn Brook @ Ministerial 23 42 66 30 32 59 42 WD Wood River @ Switch Rd 11 28 21 14 18 11 17 WO Woonasquatucket @ Greystone 26 21 LE 27 24 32 26 WO Woonasquatucket @ Donigian 16 23 25 31 18 45 26 WO Woonasquatucket - Waterplace Prk 21 14 323 73 36 52 87

Watershed LOCATION MAY JUNE JULY AUG. SEPT. OCT. MEAN

Code TRIBUTARIES (WPWA tribs next page) - - (ug/l or ppb) - - WD Barber - Mud Brook LE 15 LE 45 23 24 27 WO Geoville Pond @ Capron Pond - - 9 - 10 15 11 WO Geoville Pond @ Harris Brook - - 59 - 12 23 31 A Secret - Oak Hill East 11 - 16 - - 86 38 A Secret - Trib @ Shore Dr. 9 - 37 - - 49 32 WO Slack's Tributary B (western cove) - ND - 23 23 44 23 WO Slack's Tributary C (SW cove) - 4 - 27 15 64 28 B Smith & Sayles @ Balcom - ND 24 - 15 - 14 B Smith & Sayles @ Keech - ND 13 - - - 8 TA Stafford Pond - NE Cove - 12 25 36 - - 24 WD Watchaug - Perry Healy Brook 22 - 17 - 39 46 31 WO Waterman @ Rte 44 (Nine Foot Brk) 14 - 27 - - 50 30 WO Waterman @ Saw Mill (Cutler Brook) 30 - 25 - - 54 36

Limit of Detection = 4 ppb; Mean calculated using half the limit of detection (2 ppb) for < 4 LE = Lab error. Contamination was identified in the analytical process.

Wood Pawcatuck Watershed Asssociation Tributary Monitoring Sites on the next page

2016 2016 Parameter Data: Total Phosphorus, River, Brook and Tributary Sites

Watershed LOCATION MAY JUNE JULY AUG. SEPT. OCT. MEAN Code WPWA - TRIBUTARIES - - (ug/l or ppb) - - WD Chipuxet @ Rte 138 12 19 24 15 9 45 21 WD P’tuck @ Biscuit City Rd 13 21 27 25 16 40 24 WD P’tuck below Kenyon Ind. 354 201 99 318 92 87 192 WD P’tuck @ Burdickville Rd 19 26 46 190 31 27 57 WD P’tuck @ Potter Hill 17 35 31 22 23 22 25 WD Pendelton Hill Brk Rtes 49/216 64 39 26 22 6 17 29 WD Shunock River @ Rte 49 13 28 16 18 - 12 17 WD Shunock River @ Rte 184 16 33 25 26 20 18 23 WD Usquepaugh @ Rte 2 35 23 30 86 26 19 37 WD White Brook inlet @ Pine Hill Rd 36 54 78 113 39 67 64 Limit of Detection = 4 ppb See http://web.uri.edu/watershedwatch/water-quality-factsheets/Phosphorus.pdf for more information on phosphorus and water quality. Limit of Detection = 4 ppb; Mean calculated using half the limit of detection (2 ppb) for < 4 LE = Lab error. Contamination was identified in the analytical process.

Pawcatuck River approaching Biscuit City landing (Image from http://eckilson.blogspot.com/2017/05/)

2016