Name | Volga River @ Littleport Rd/X21 |
Code | VR-20 |
County | Clayton |
Latitude | 42.7539 |
Longitude | -91.3691 |
Notes | USGS Station |
HUC_8 | 7060004 |
USGS Gage | waterdata.usgs.gov/usa/nwis/uv?site_no=05412400 |
Sampled by | Iowa DNR Fisheries ~ Big Spring Hatchery |
GREEN = Better than average water quality compared to other sites in the watershed
RED = Worse than average water quality compared to other sites in the watershed
GRAY = The average value from all sites in the watershed. Useful for comparison.
pH |
Chloride mg/L | Celsius C | Fahrenheit F | Transparency cm | DO mg/L | P mg/L | N mg/L | E. Coli MPN/100mL | Ammonia mg/L | Discharge cfs | Gage Height ft | Total Suspended Solids mg/L | Total Kjeldahl Nitrogen as N mg/L | Chloride (Lab) mg/L | Sulfate mg/L | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
All Years | 8.3 (8.3) | <33 (<33) | 16.5 (15.6) | 61.7 (60.0) | 50 (52) | 9.2 (8.6) | 0.16 (0.21) | 4.6 (6.7) | 245 (372) | 0.06 (0.09) | 297 (648) | 4.6 (5.4) | 90 (29) | 0.4975 (0.622) | 12.56 (27.87) | 17.86 (22.17) |
2015 Mean | 8.3 (8.3) | (<33) | 18.0 (17.3) | 64.5 (63.1) | 51 (53) | (7.2) | 0.19 (0.23) | 4.0 (6.1) | 433 (442) | 69 (396) | 3.7 (4.5) | 90 (20) | 12.56 (22.17) | 17.86 (23.58) | ||
2014 Mean | 8.3 (8.2) | <33 (<33) | 15.5 (14.6) | 59.8 (58.3) | 55 (57) | 8.8 (8.4) | 0.1 (0.18) | 4.9 (7.3) | 108 (196) | 281 (761) | 4.4 (5.4) | 0.4975 (0.622) | ||||
2013 Mean | 8.2 (8.2) | <33 (<33) | 15.4 (13.6) | 59.8 (56.5) | 49 (46) | 9.4 (8.8) | 0.18 (0.27) | 4.9 (7.6) | 429 (960) | 0.06 (0.13) | 431 (965) | 5.2 (6.1) | ||||
2012 Mean | 8.2 (8.3) | <33 (<33) | 17.0 (17.4) | 62.6 (63.3) | 46 (51) | 9.8 (8.8) | 0.26 (0.17) | 3.4 (4.8) | 283 (374) | 0.06 (0.07) | 219 (361) | 4.1 (4.6) | (16) | |||
2011 Mean | 8.4 (8.3) | <33 (<33) | 17.1 (15.9) | 62.8 (60.7) | 49 (58) | 9.0 (9.0) | 0.09 (0.1) | 5.6 (6.4) | 186 (237) | <0.05 (0.06) | 306 (554) |
*All averages are arithmetic means, except for E. Coli and/or Fecal Coliform, which are calculated as geometric means. For purposes of calculating a mean, values that exceed the measurement limit (e.g., <0.05, 60+, <33) are assumed to be 20% greater or less than their limit (e.g., 0.04, 72, 26.4).
For 2.8% of the data records, Nitrate+Nitrite exceeded 10 mg/L. 10 mg/L represents the U.S. Public Health Service recommended limit of 10 mg/L NO3-N (nitrate-nitrogen) in drinking water.
For 38.9% of the data records, E. coli bacteria exceeded 235 CFU/100 ml. 235 CFU/100 ml represents Iowa's single sample maximum water quality standard for primary contact recreational use (Class A1), secondary contact recreational use (Class A2), and children's recreational use (A3).
Sample Date | Time | by | pH |
Chloride mg/L | Celsius C | Fahrenheit F | Transparency cm | DO mg/L | P mg/L | N mg/L | E. Coli MPN/100mL | Ammonia mg/L | Discharge cfs | Gage Height ft | Total Suspended Solids mg/L | Total Kjeldahl Nitrogen as N mg/L | Chloride (Lab) mg/L | Sulfate mg/L |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
10/27/15 | 16:00 | Gary Siegwarth | 8.33 | 10.7 | 51.3 | 60+ | 0.04 | 2.4 | 41 | 54 | 3.63 | 1.2 | 12.6 | 20.5 | ||||
09/29/15 | 15:01 | Gary Siegwarth | 8.32 | 17.8 | 64.0 | 55 | 0.07 | 1.9 | 1670 | 83 | 3.82 | 5.5 | 10.9 | 17.2 | ||||
08/25/15 | 14:30 | Gary Siegwarth | 8.35 | 18.4 | 65.1 | 60+ | 0.07 | 2.5 | 41 | 5.7 | 12.7 | 20.3 | ||||||
07/28/15 | 13:50 | Gary Siegwarth | 8.4 | 22.6 | 72.7 | 49 | 0.08 | 3.0 | 521 | 3 | 11.7 | 17.2 | ||||||
06/30/15 | 16:07 | Gary Siegwarth | 8.21 | 20.7 | 69.3 | 5 | 0.7 | 10.3 | 10462 | 434.5 | 14.9 | 14.1 | ||||||
11/05/14 | 17:07 | Aaron Schwartzhoff | 8.46 | <29 | 7.4 | 45.3 | 60+ | 10 | 0.03 | 3.6 | 20 | 117 | 4.02 | 0.3 | ||||
10/01/14 | 14:41 | Wayne Wingert | 8.34 | <33 | 13.7 | 56.7 | 60+ | 10 | 0.04 | 2.7 | 160 | 83 | 3.82 | 0.3 | ||||
09/03/14 | 16:03 | Gary Siegwarth | 8.34 | <33 | 21.5 | 70.7 | 34 | 8 | 0.12 | 2.8 | 1200 | 181 | 4.34 | 0.6 | ||||
08/06/14 | 15:23 | Gary Siegwarth, Andrew | 8.25 | <29 | 20.9 | 69.6 | 60+ | 9 | 0.06 | 3.8 | 20 | 136 | 4.16 | 0.4 | ||||
07/09/14 | 14:46 | Wayne Wingert, Andrew | 8.49 | <29 | 20.2 | 68.4 | 27 | 8 | 0.15 | 8.4 | 660 | 538 | 5.64 | 0.6 | ||||
06/04/14 | 16:22 | Gary Siegwarth, Andrew | 8.0 | <33 | 21.1 | 70.0 | 60+ | 7 | 0.12 | 5.4 | 84 | 238 | 4.53 | 0.3 | ||||
05/07/14 | 13:05 | Gary Siegwarth | 8.3 | <33 | 13.2 | 55.8 | 60+ | 9 | 0.05 | 8.7 | 110 | 463 | 0.5 | |||||
04/02/14 | 16:14 | Gary Siegwarth | 8.17 | <33 | 5.6 | 42.1 | 20 | 9 | 0.25 | 3.4 | 41 | 489 | 0.98 | |||||
11/06/13 | 16:43 | Gary Siegwarth | <30 | 9.0 | 48.2 | 60+ | 11 | 0.05 | 3.3 | 140 | 0.1 | 119 | 4.23 | |||||
10/16/13 | 14:17 | Wayne Wingert | <30 | 12.1 | 53.8 | 60+ | 9 | 0.02 | 2.8 | 110 | <0.05 | 80 | 4.0 | |||||
09/04/13 | 15:00 | Amelia Schaller | <30 | 20.0 | 68.0 | 60+ | 9 | 0.05 | 3.0 | 160 | <0.05 | 86 | 4.04 | |||||
08/07/13 | 15:30 | Gary Siegwarth, Maury | 8.4 | <30 | 23.1 | 73.6 | 60+ | 9 | 0.06 | 3.6 | 350 | <0.05 | 179 | 4.53 | ||||
07/10/13 | 13:24 | Gary Siegwarth | 8.1 | <30 | 22.1 | 71.8 | 27 | 7 | 0.1 | 6.0 | 990 | <0.05 | 330 | |||||
06/05/13 | 14:30 | Amelia Schaller | 8.1 | <30 | 13.5 | 56.3 | 20.2 | 9 | 0.14 | 8.6 | 380 | <0.05 | 871 | 6.61 | ||||
05/01/13 | 17:49 | Gary Siegwarth | 8.1 | <30 | 18.4 | 65.1 | 53 | 9 | 0.1 | 8.2 | 270 | <0.05 | 460 | 5.47 | ||||
04/10/13 | 15:10 | Gary Siegwarth | 8.1 | <30 | 5.1 | 41.2 | 4 | 12 | 0.95 | 3.4 | 13000 | 0.15 | 1320 | 7.67 | ||||
11/07/12 | 18:01 | 8.4 | <33 | 7.4 | 45.3 | 60+ | 12 | 0.02 | 2.0 | 63 | <0.05 | 73 | 3.92 | |||||
10/03/12 | 15:23 | 8.2 | <33 | 13.5 | 56.3 | 60+ | 11 | 0.03 | 1.7 | 30 | <0.05 | 52 | 3.77 | |||||
09/05/12 | 15:31 | 8.0 | <33 | 18.8 | 65.8 | 1.1 | 12 | 1.6 | 0.82 | 24000 | 0.22 | 199 | 4.58 | |||||
08/01/12 | 12:36 | 8.3 | <33 | 21.6 | 70.9 | 37 | 7 | 0.07 | 2.0 | 160 | <0.05 | 84 | ||||||
07/02/12 | 14:00 | 8.1 | <33 | 26.6 | 79.9 | 60+ | 9 | 0.06 | 2.7 | 200 | 0.05 | |||||||
06/06/12 | 12:10 | 8.3 | <33 | 18.9 | 66.0 | 43 | 11 | 0.08 | 7.0 | 110 | <0.05 | 257 | ||||||
05/02/12 | 16:35 | 8.3 | <33 | 16.0 | 60.8 | 12 | 9 | 0.18 | 5.9 | 8200 | <0.05 | 551 | ||||||
04/04/12 | 15:28 | 8.3 | <33 | 13.1 | 55.6 | 55 | 7 | 0.03 | 5.0 | 52 | <0.05 | 323 | ||||||
04/04/12 | 15:09 | 8.2 | <33 | 13.3 | 55.9 | 55 | 7 | 0.03 | 5.0 | 31 | <0.05 | 320 | ||||||
11/02/11 | 16:50 | 8.3 | <33 | 9.7 | 49.5 | 60+ | 9 | <0.02 | 3.3 | 110 | <0.05 | 115 | ||||||
10/05/11 | 16:10 | 8.5 | <33 | 14.3 | 57.7 | 60+ | 10 | 0.04 | 3.7 | 130 | <0.05 | 140 | ||||||
10/05/11 | 15:48 | 8.5 | <33 | 14.3 | 57.7 | 60+ | 10 | 0.04 | 3.7 | 74 | <0.05 | 140 | ||||||
09/07/11 | 13:40 | 8.4 | <33 | 15.8 | 60.4 | 22 | 9 | 0.16 | 6.2 | 930 | <0.05 | 417 | ||||||
08/03/11 | 15:10 | 8.4 | <33 | 24.8 | 76.6 | 22.5 | 8 | 0.14 | 6.0 | 750 | <0.05 | 345 | ||||||
07/06/11 | 15:36 | 8.3 | <33 | 24.9 | 76.8 | 60+ | 9 | 0.06 | 4.5 | 98 | <0.05 | 170 | ||||||
06/01/11 | 15:35 | 8.5 | <33 | 20.2 | 68.4 | 36 | 8 | 0.11 | 8.0 | 140 | <0.05 | 399 | ||||||
05/04/11 | 15:35 | 8.1 | <33 | 10.3 | 50.5 | 48 | 10 | 0.08 | 7.3 | 98 | <0.05 | 554 |
Sample Date | Time | by | pH |
Chloride mg/L | Celsius C | Fahrenheit F | Transparency cm | DO mg/L | P mg/L | N mg/L | E. Coli MPN/100mL | Ammonia mg/L | Discharge cfs | Gage Height ft | Total Suspended Solids mg/L | Total Kjeldahl Nitrogen as N mg/L | Chloride (Lab) mg/L | Sulfate mg/L |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
05/30/13 | 20:20 | Gary & Marcus Siegwarth | 7.8 | <33 | 18.4 | 65.1 | 2 | 11 | 1.9 | 5.2 | 0.11 | 5220 | 13.65 | |||||
03/11/13 | 21:06 | Gary Siegwarth | 8.7 | <33 | 0.9 | 33.6 | 4 | 1.1 | 0.52 | 910 | 0.58 | 3820 | 11.79 |