Overview
  • Station Id: 01531500
  • County: Bradford
  • Drainage Area: 7,781 sq.mi.
  • Station Coordinates: 41.792°, -76.443°
  • Period of record: 9/88 to present
Location Description
The sampling location is on the James Street bridge just north of the GTE Industrial Plant. The stream gage is located on the west bank of the Susquehanna River at the end of Bridge Street in Towanda, Pa.
Data
2000 Land Use
Urban Agricultural Forested Other
Urban Agricultural Forested Other
Row Crops Pasture/Hay Total
3% 10% 20% 30% 59% 8%
Site Drainage Area

Please select a parameter from the list to view graphs of loads and concentrations. After a selection is made, you may need to scroll down to view the graphs.

2015 Flow Normalized Trends

Trend period (Water Year) 1988-2015
FNC (Flow Normalized Concentration) (mg/L) FNC Slope – mg/L/yr
FNF (Flow Normalized Flux) 10^6 kg/yr FNF Slope – 10^6 kg/yr/yr
Trend & Direction NS – Not significant,  UP – Increasing trend,  DOWN – Decreasing trend
SMK – Seasonal Mann-Kendall for flow trends, alpha level 0.05
FNC/FNF alpha level 0.1
HL (Highly Likely) ≥0.95 and ≤1.00 
VL (Very Likely) ≥0.90 and <0.95 
L (Likely) ≥0.66 and <0.90
ALAN (About as Likely as Not) >0.33 and <0.66
Parameter/code Trend Test Change Slope % Change Over the Period of Record Hypothesis Test Likelihood Test
P-value Trend Value Descriptor Direction
FLOW / 60 SMK - - - 0.658 NS - - -
TN / 600 FNC -0.586 -0.023 -39 <0.05 Down 0.99 HL Down
FNF -7.20 -0.28 -41 <0.05 Down 0.99 HL Down
TNOx / 630 FNC -0.309 -0.012 -37 <0.05 Down 0.99 HL Down
FNF -3.29 -0.13 -36 <0.05 Down 0.99 HL Down
TON / 605 FNC -0.202 -0.0078 -37 <0.05 Down 0.99 HL Down
FNF -3.18 -0.12 -43 <0.05 Down 0.99 HL Down
TNH3 / 610 FNC -0.02 -0.00077 -34 0.045 Down 0.98 HL Down
FNF -0.33 -0.013 -40 0.17 NS 0.92 VL Down
DN / 602 FNC -0.437 -0.017 -36 <0.05 Down 0.99 HL Down
FNF -5.14 -0.2 -37 <0.05 Down 0.99 HL Down
DNOx / 631 FNC -0.309 -0.012 -37 <0.05 Down 0.99 HL Down
FNF -3.26 -0.13 -36 <0.05 Down 0.99 HL Down
DON / 607 FNC -0.095 -0.0037 -29 <0.05 Down 0.99 HL Down
FNF -1.59 -0.061 -39 <0.05 Down 0.99 HL Down
DNH3 / 608 FNC -0.016 -0.00061 -30 0.058 Down 0.97 HL Down
FNF -0.23 -0.0089 -34 0.072 Down 0.97 HL Down
TP / 665 FNC -0.034 -0.0013 -39 0.043 Down 0.97 HL Down
FNF -0.24 -0.0091 -19 0.34 N/A 0.82 L Down
DP / 666 FNC -0.028 -0.0011 -62 <0.05 Down 0.99 HL Down
FNF -0.29 -0.011 -61 <0.05 Down 0.99 HL Down
DOP / 671 FNC 0.0002 <0.0001 2 0.93 NS 0.46 ALAN UP
FNF 0.03 0.0012 29 0.38 NS 0.81 L UP
TOC / 680 FNC -0.491 -0.019 -14 <0.05 Down 0.99 HL Down
FNF -1.10 -0.042 -2.6 0.72 NS 0.64 ALAN Down
SSC / 80154 FNC -4.510 -0.17 -11 0.4 NS 0.79 L Down
FNF -257.4 -9.9 -18 0.44 NS 0.79 L Down