Roberts Creek @ Dalmation Ave [ROB-50]

NameRoberts Creek @ Dalmation Ave
CodeROB-50
CountyClayton
Latitude42.9596
Longitude-91.4563
NotesLow-water bridge
HUC_87060004
Photo Galleryhttps://photos.app.goo.gl/ETzX1qoJeZtywKea6
Sampled byNortheast Iowa Resource Conservation and Development

Sampling Location

Yearly Averages for Roberts Creek @ Dalmation Ave [ROB-50] Download in CSV format
(with comparison to all locations in the watershed)

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 Total Suspended Solids mg/L Chloride (Lab) mg/L Sulfate mg/L
All Years 8.3 (8.3) <33 (<33) 15.3 (15.6) 59.6 (60.0) 45 (52) 9.1 (8.6) 0.22 (0.21) 7.3 (6.7) 413 (372) 0.09 (0.09) 210 (29) 17.18 (27.87) 23.22 (22.17)
2019 Mean 8.6 (8.4) 30 (29) 0.47 (0.5) 6.9 (8.5) 508 (1160) 31 (25) 14.7 (34.3) 19.86 (20.61)
2018 Mean 0.16 (0.24) 9.5 (8.8) 248 (269) 30 (16) 19.38 (34.33) 24.62 (21.18)
2017 Mean 8.4 (8.3) 13.8 (13.2) 56.8 (55.8) 33 (35) 0.17 (0.51) 7.9 (8.8) 460 (298) 662 (79) 15.86 (34.35) 21.81 (19.7)
2015 Mean (8.3) (<33) 17.5 (17.3) 63.5 (63.1) 60+ (53) (7.2) 0.14 (0.23) 6.6 (6.1) 567 (442) 11 (20) 19.86 (22.17) 28.24 (23.58)
2014 Mean 8.2 (8.2) <33 (<33) 13.9 (14.6) 57.0 (58.3) 54 (57) 8.9 (8.4) 0.15 (0.18) 7.6 (7.3) 234 (196)
2013 Mean 8.1 (8.2) <33 (<33) 13.4 (13.6) 56.2 (56.5) 35 (46) 9.3 (8.8) 0.37 (0.27) 7.4 (7.6) 1682 (960) 0.18 (0.13)
2012 Mean 8.4 (8.3) <33 (<33) 18.0 (17.4) 64.4 (63.3) 57 (51) 10.0 (8.8) 0.12 (0.17) 5.3 (4.8) 259 (374) 0.06 (0.07) (16)
2011 Mean 8.3 (8.3) <33 (<33) 16.2 (15.9) 61.1 (60.7) 49 (58) 8.0 (9.0) 0.13 (0.1) 7.7 (6.4) 247 (237) <0.05 (0.06)

*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).

Water Quality Standards

For 21.4% 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 78.6% 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).

Download in CSV format

Monthly Water Sampling Data for Roberts Creek @ Dalmation Ave [ROB-50]

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 Total Suspended Solids mg/L Chloride (Lab) mg/L Sulfate mg/L
10/01/19 00:00 Eric Palas 8.1 10 2.5 2.3 24066 7.8 7.3
09/10/19 00:00 Eric Palas 8.6 20 0.2 4.6 4106 64.4 16.1 24.0
08/06/19 00:00 Eric Palas 8.6 38 0.12 6.5 404 13.5 15.9 21.7
07/08/19 00:00 Eric Palas 8.5 29 0.12 10.4 776 65 15.2 22.1
06/04/19 00:00 Eric Palas 8.8 30 0.06 10.8 10 11.5 15.2 19.8
05/07/19 00:00 Eric Palas 8.7 38 0.16 6.7 1401 16.8 16.8 20.7
04/02/19 00:00 Eric Palas 8.7 45 0.1 6.8 20 14.8 15.9 23.4
09/18/18 00:00 Eric Palas 0.13 10.2 1314 5.2 13.9 16.9
08/14/18 00:00 Eric Palas 0.23 6.3 10 27.6 25.2 32.0
07/11/18 00:00 Eric Palas 0.18 9.2 259 26.5 18.9 24.3
06/12/18 00:00 Eric Palas 16.5 839 104.5 19.0 19.2
05/07/18 00:00 Eric Palas 0.2 10.5 262 5.5 21.2 24.6
04/10/18 00:00 Eric Palas 0.08 4.4 313 9.6 18.1 30.7
11/01/17 00:00 Eric Palas 8.7 11.4 52.5 50 0.15 7.5 677 677 18.3 28.9
09/26/17 00:00 Eric Palas 8.4 13.3 55.9 19 0.27 4.5 2382 2382 21.2 25.0
09/05/17 00:00 Eric Palas 8.5 16.2 61.2 32 0.15 7.0 196 196 19.8 26.9
07/25/17 00:00 Eric Palas 8.3 17.1 62.8 29 0.18 11.5 1246 1246 17.9 21.6
06/27/17 00:00 Eric Palas 8.2 15.7 60.3 18 10.0 1664 72 14.7 21.8
05/30/17 00:00 Eric Palas 8.3 19.5 67.1 53 0.11 8.7 332 14 9.0 16.8
04/25/17 00:00 Eric Palas 8.3 3.2 37.8 29 0.15 5.8 20 46.8 10.1 11.7
10/27/15 17:15 Brad Crawford 9.5 49.1 60+ 0.1 4.2 243 5 20.1 33.0
09/29/15 19:15 Brad Crawford 19.6 67.3 58 0.18 3.7 1515 7.2 18.2 28.2
08/25/15 16:40 Brad Crawford 17.7 63.9 60+ 0.16 5.2 250 8.8 20.9 30.0
07/28/15 14:15 Brad Crawford 22.9 73.2 60+ 0.14 6.1 539 2.5 18.8 25.5
06/30/15 15:47 Ross Evelsizer 17.8 64.0 41 0.14 13.7 1178 29.3 21.3 24.5
11/05/14 15:50 Brad Crawford 8.2 <29 6.2 43.2 59 12 0.07 6.9 98
11/05/14 15:45 Brad Crawford 8.19 <29 6.2 43.2 59 12 0.11 6.9 140
10/01/14 15:10 Brad Crawford 8.06 <29 13.5 56.3 51 6 0.12 5.5 330
09/03/14 15:15 Brad Crawford 8.2 <29 18.9 66.0 54 8 0.24 5.4 410
08/06/14 15:30 Brad Crawford 8.27 <29 19.7 67.5 46 8 0.11 8.0 580
07/09/14 16:30 Brad Crawford 8.3 <29 17.4 63.3 51 8 0.1 13.0 740
06/04/14 14:30 Brad Crawford 7.97 <29 19.1 66.4 60+ 8 0.14 7.3 310
06/04/14 14:25 Brad Crawford 7.97 <29 19.1 66.4 60+ 7 0.11 7.3 280
05/07/14 13:50 Brad Crawford 8.37 <29 11.1 52.0 60+ 10 0.09 9.5 75
04/02/14 14:15 Brad Crawford 8.45 <29 5.0 41.0 23 12 0.34 5.0 52
11/06/13 15:17 Brad Crawford & Richard Kittelson 8.4 <30 6.9 44.4 27 10 0.26 <0.1 840 0.58
10/16/13 15:10 Brad Crawford 7.65 <30 10.6 51.0 54 7 0.08 4.9 440 <0.05
09/04/13 15:50 Brad Crawford and Dave Pahlas 8.25 <30 19.0 66.2 37 8 0.14 6.5 310 <0.05
08/07/13 14:00 Brad Crawford and Dave Pahlas 8.04 <30 20.4 68.7 35 7 0.17 7.1 6500 <0.05
07/10/13 16:05 Brad Crawford 8.09 <30 19.7 67.5 19 10 0.2 11.0 4100 <0.05
06/05/13 14:10 Brad Crawford and Dave Pahlas 7.91 <30 11.4 52.5 33 8 0.15 14.0 560 0.06
05/01/13 17:50 Brad Crawford 8.57 <30 16.0 60.8 60+ 12 0.09 8.3 2200 <0.05
04/10/13 18:30 Brad Crawford, Dave Pahlas 8.09 <30 3.5 38.3 3 12 1.9 7.7 17000 0.56
11/07/12 17:49 8.72 <33 5.5 41.9 60+ 12 0.06 4.0 98 <0.05
10/03/12 15:15 8.38 <33 12.1 53.8 60+ 10 0.06 2.6 330 <0.05
09/05/12 19:50 8.02 <33 21.7 71.1 18 6 0.31 2.3 3100 0.1
08/01/12 17:45 <33 25.6 78.0 60+ 12 0.09 3.0 250 0.06
07/02/12 12:40 8.14 <33 25.6 78.0 44 6 0.13 5.6 360 0.07
06/06/12 19:22 <33 20.6 69.0 60+ 12 0.1 12.0 340 0.06
05/02/12 17:35 8.06 <33 15.9 60.6 32 10 0.15 7.2 660 <0.05
04/04/12 20:35 8.78 <33 17.1 62.8 60+ 12 0.03 5.7 10 <0.05
11/02/11 17:35 8.45 <33 8.8 47.8 60+ 10 0.1 4.8 370 <0.05
10/05/11 13:56 8.32 <33 12.6 54.7 45 8 0.12 5.2 400 <0.05
09/07/11 13:30 8.29 <33 15.2 59.4 28 8 0.19 5.7 540 <0.05
08/03/11 12:10 8.13 <33 24.6 76.3 60+ 6 0.12 7.2 620 0.08
07/06/11 17:10 8.42 <33 24.3 75.7 26 6 0.17 9.0 700 <0.05
06/01/11 13:30 8.1 15.4 59.7 29 0.11 12.0 200 <0.05
05/04/11 19:50 8.7 <33 12.2 54.0 60+ 10 0.09 9.9 <10 <0.05
  • 10/01/2019: 3" Rain
  • 09/26/2017: 1.6" rain
  • 08/06/2014: Lower flow
  • 04/02/2014: Photos
  • 06/06/2012: water level, 1ft below bottom of low water bridge

Nearby Sampling Locations

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