2014 Parameter Data: pH in River, Brook and Tributary Sites The standard measurement of acidity is pH. A pH of less than 7 is acidic; above pH 7 is alkaline, also known by the term “basic.” The pH measurement is a logarithmic measurement, which means that each unit decrease in pH equals a ten-fold increase in acidity. In other words, pH 5 water is ten times more acidic than pH 6 water. The normal pH range for rivers and streams in Rhode Island is between 6 and 8 pH units. River sites arranged upstream to downstream when appropriate. Watershed RIVER & BROOK SITES MAY JUNE JULY AUG. SEPT. OCT. MEAN Code pH - - - - - - Standard pH units - - - - - - A Annaquatucket R - Belleville @ RR Crossing6.9 7.0 6.9 6.8 6.6 6.8 6.8 NA Borden Brook 4.8 4.9 4.7 4.9 - - 4.8 NA Buckeye Brook #1 @ Novelty Rd 6.9 7.3 7.1 7.3 7.3 7.3 7.2 NA Buckeye Brk #2 @ Lockwood Brk 6.8 6.7 6.8 6.6 6.5 6.5 6.6 NA Buckeye Brk #3 @ Knowles/Parsons Brk 6.9 7.0 6.8 6.7 - 6.4 6.8 NA Buckeye Brk #4 @ Warner Brook 6.6 6.6 6.5 6.3 6.4 6.4 6.5 NA Buckeye Brook #5 @ Mill Cove 6.9 7.2 7.1 6.8 7.4 7.0 7.0 WD Falls River D - Step Stone Falls 6.5 6.4 6.6 6.1 6.6 6.5 6.4 WD Falls River C - Austin Farm Rd. 6.5 6.9 6.9 6.5 6.7 6.9 6.7 WD Falls River A - Twin Bridges 6.6 6.7 6.8 6.3 6.5 6.4 6.5 A Himes River @ Hideaway Lane 6.3 7.0 6.6 7.4 7.4 6.9 6.9 H HW1A - Scrabbletown Brk @ Falls 6.6 7.0 7.2 - - - 6.9 H HW1B - Scrabbletown @ Rt 4 Bridge 6.8 7.0 7.1 - - - 7.0 H HW5 - Sandhill Brook (Saw Mill Inlet) 6.3 6.6 6.4 6.4 6.5 6.3 6.4 H HW6 - Hunt River @ Forge Rd. 6.9 6.9 6.8 7.6 6.8 6.7 6.9 TH Moosup River - Upstream 6.7 6.8 6.6 6.4 6.5 6.4 6.5 TH Moosup River A - Fairbanks 6.6 6.5 6.7 6.3 6.3 6.4 6.5 WD Pawcatuck River - Bradford 6.6 6.7 6.6 6.9 7.0 6.6 6.7 PA Pawtuxet River near Rhodes 7.1 7.2 7.1 6.8 7.2 7.0 7.0 WD Queen River System @ Sherman Brook 6.1 6.5 6.6 6.3 - 6.3 6.3 WD Shickasheen Brook @ Rte 2 6.5 6.3 6.8 - DRY - 6.5 WD Shickasheen Brk @ Miskiania Rd 7.2 7.4 7.4 7.4 DRY 7.0 7.3 WD Shickasheen Brk @ Barber P Outlet 6.7 7.0 6.9 6.9 DRY 6.5 6.8 WD Shickasheen Brook @ Rte 138 5.9 6.4 6.4 6.6 DRY 6.1 6.3 WD Shickasheen Brk @ Liberty Lane 6.4 6.5 6.4 6.3 6.5 6.3 6.4 WD White Horn Brook @ Bike Trail 6.7 6.6 6.3 6.8 6.5 6.4 6.6 TE White Horn Brook @ Ministerial 6.5 6.6 6.4 6.6 6.6 6.2 6.5 WD Woonasquatucket @ Greystone 7.6 6.9 7.1 6.9 7.1 6.8 7.1 WO Woonasquatucket @ Donigian 7.1 7.4 7.5 7.3 7.6 7.4 7.4 WO Woonasquatucket - Waterplace Prk 6.9 7.3 7.2 7.2 7.3 7.2 7.2 Waterplace Park Narrow River sites included in Coastal Sites tables, Tributary streams, next page 2014 2014 Parameter Data: pH in River, Brook and Tributary Sites The normal pH range for rivers and streams in Rhode Island is between 6 and 8 pH units. Watershed LOCATION MAY JUNE JULY AUG. SEPT. OCT. MEAN Code TRIBUTARIES - - - - - - Standard pH units - - - - - - WD Barber - Mud Brook 6.1 6.1 6.2 6.1 DRY 5.9 6.1 WO Geo @ Capron Pond - - 7.3 - 7.1 - 7.2 WO Geo @ Harris Brook - - - - 7.2 - - WD NSCLA - Green Falls River #2 (@ Putker) 6.6 6.5 6.7 - - 6.1 6.5 WD NSCLA - Green Falls - Rte 184 6.8 6.8 6.8 - - 6.5 6.7 NSCLA - Green Falls #3 (Clark Falls WD 6.9 6.8 6.8 - - 6.3 6.7 Rd/Rte 216) NSCLA - Pendleton Hill Brook @ Rte WD 6.8 6.7 6.8 - - 6.4 6.7 49/216 WD Pasquisett Tributary 6.7 6.5 6.3 6.3 - - 6.5 CE Quicksand Trib - North (Cole Brk) - 6.9 7.2 7.0 7.5 6.8 7.1 CE Quicksand Trib - @ Rock Bridge - 7.2 6.4 6.7 7.1 6.7 6.8 Quicksand Trib - Downstream of Rock CE - - - - - 6.7 - Bridge A Secret - Oak Hill East 6.9 - 7.0 - - 6.6 6.8 A Secret - Shore Dr. 6.2 - 6.3 - - 6.4 6.3 WO Slack's Tributary B 7.1 7.4 6.9 - 7.0 7.3 7.1 WO Slack's Tributary C 7.0 7.1 6.9 - 6.9 7.3 7.0 B Smith & Sayles @ Balcom 6.2 6.5 6.5 - - - 6.4 B Smith & Sayles @ Keech - 6.4 6.8 - - - 6.6 B Smith & Sayles @ O'Donnel 5.1 5.6 - - - - 5.3 TA Stafford - NE Cove 7.1 - 7.1 - 7.8 7.0 7.2 CW Trustom Pond Tributary - East 6.3 6.6 6.6 7.0 - - 6.6 WD Watchaug - Perry Healy 6.3 - 6.5 - 7.1 6.4 6.6 WO Waterman @ Rte 44 6.6 - 7.1 - - 6.5 6.7 WO Waterman @ Saw Mill 6.9 - 7.0 - - 6.5 6.8 Stream flow gauging in the Wood River (Photo from the http://www.thewesterlysun.com) 2014 2014 Parameter Data: pH in River, Brook and Tributary Sites Wood Pawcatuck River sites arranged upstream to downstream when appropriate. Watershed LOCATION MAY JUNE JULY AUG. SEPT. OCT. MEAN Code WPWA - TRIBUTARIES - - (ug/l or ppb) - - WD Ashaway River @ Wellstown Rd. 6.7 6.8 7.0 7.0 6.5 6.8 6.8 WD Tomaquag Brk @ Chase Hill 6.8 6.7 7.0 6.8 - 6.7 6.8 WD Brushy Brook @ Woody Hill 5.4 5.6 5.7 5.2 - 5.6 5.5 WD Brushy Brook @ Saw Mill 6.0 6.2 6.3 5.9 - 6.0 6.0 WD White Brook Inlet 6.4 6.5 6.6 6.5 6.3 6.7 6.5 WD Chipuxet River @ Rte 138 6.5 6.6 6.5 6.4 6.4 6.4 6.4 WD P’tuck @ Biscuit City Rd 6.2 6.4 6.0 6.3 6.8 5.7 6.2 WD P’tuck below Kenyon Ind. 6.3 6.6 6.7 6.7 6.8 6.8 6.6 WD P'tuck River @ Rte 91 6.5 6.7 6.8 6.8 6.5 6.9 6.7 WD P’tuck River @ Burdickville Rd 6.6 6.8 7.0 6.7 6.8 6.7 6.7 WD Queen River @ Rte 102 6.1 6.2 6.4 6.3 6.3 6.4 6.3 WD Queen River @ Mail Rd 6.5 6.7 6.5 6.6 6.8 6.6 6.6 WD Glen Rock Brook 6.5 6.7 6.6 6.5 - 6.4 6.5 WD Usquepaugh River @ Rte 2 6.5 6.6 6.7 6.6 7.0 6.6 6.7 Brook trout in Queen River (Photo from www.nature.org) 2014.