Dry Mill Creek @ Grape Rd [DMI-10]

NameDry Mill Creek @ Grape Rd
CodeDMI-10
CountyClayton
Latitude42.8433
Longitude-91.3697
HUC_87060004
Photo Galleryhttps://photos.app.goo.gl/dj2YTS5G1ff7qeeT6
Sampled byNortheast Iowa Resource Conservation and Development

Sampling Location

Yearly Averages for Dry Mill Creek @ Grape Rd [DMI-10] 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) 14.5 (15.6) 58.0 (60.0) 60+ (52) 10.1 (8.6) 0.16 (0.21) 9.8 (6.7) 334 (372) 0.07 (0.09) 3 (29) 17.38 (27.87) 31.58 (22.17)
2015 Mean (8.3) (<33) 15.0 (17.3) 59.0 (63.1) 60+ (53) (7.2) 0.1 (0.23) 9.3 (6.1) 474 (442) 3 (20) 17.38 (22.17) 31.58 (23.58)
2014 Mean 8.3 (8.2) <33 (<33) 13.7 (14.6) 56.7 (58.3) 60+ (57) 10.2 (8.4) 0.11 (0.18) 9.5 (7.3) 119 (196)
2013 Mean 8.2 (8.2) <33 (<33) 12.7 (13.6) 54.9 (56.5) 58 (46) 9.7 (8.8) 0.15 (0.27) 10.6 (7.6) 608 (960) 0.08 (0.13)
2012 Mean 8.3 (8.3) <33 (<33) 16.3 (17.4) 61.4 (63.3) 55 (51) 10.8 (8.8) 0.32 (0.17) 8.9 (4.8) 500 (374) 0.07 (0.07) (16)
2011 Mean 8.3 (8.3) <33 (<33) 14.8 (15.9) 58.7 (60.7) 60+ (58) 9.7 (9.0) 0.1 (0.1) 10.8 (6.4) 268 (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 41.7% 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 58.3% 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 Dry Mill Creek @ Grape Rd [DMI-10]

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
10/27/15 16:20 Brad Crawford 8.9 48.0 60+ 0.08 5.6 96 0.5 15.9 38.9
09/29/15 17:50 Brad Crawford 15.4 59.7 60+ 0.1 5.2 1274 2 16.1 36.8
08/25/15 15:15 Brad Crawford 14.1 57.4 60+ 0.1 7.7 496 2 17.0 33.3
07/28/15 15:05 Brad Crawford 18.6 65.5 60+ 0.13 10.2 637 1.1 17.7 26.7
06/30/15 17:47 Ross Evelsizer 17.9 64.2 60+ 18.0 620 8.7 20.2 22.2
11/05/14 16:25 Brad Crawford 8.14 <29 7.0 44.6 60+ 12 0.09 8.0 41
10/01/14 19:15 Brad Crawford 8.13 13.8 56.8 60+ 0.06 8.0 120
09/03/14 19:05 Brad Crawford 8.4 <29 20.1 68.2 60+ 0.16 8.5 300
08/06/14 18:40 Brad Crawford 8.38 <29 19.3 66.7 60+ 0.1 12.0 260
07/09/14 15:10 Brad Crawford 8.53 <29 15.8 60.4 60+ 10 0.07 15.0 510
06/04/14 15:35 Brad Crawford 8.06 <29 17.4 63.3 60+ 8 0.15 8.9 510
05/07/14 14:45 Brad Crawford 8.45 <29 11.6 52.9 60+ 10 0.05 9.6 41
05/07/14 14:40 Brad Crawford 8.45 <29 11.6 52.9 60+ 10 0.05 9.3 51
04/02/14 15:20 Brad Crawford 8.37 <29 4.8 40.6 60+ 11 0.17 6.6 <10
11/06/13 16:15 Brad Crawford & Richard Kittelson 9.08 <30 7.8 46.0 60+ 9 0.08 6.2 620 <0.05
10/16/13 15:58 Brad Crawford 7.41 <30 10.6 51.0 60+ 9 0.06 7.0 120 <0.05
10/16/13 15:55 Brad Crawford 7.45 <30 10.6 51.0 60+ 9 0.06 7.0 85 <0.05
09/04/13 14:15 Brad Crawford and Dave Pahlas 8.12 <30 14.2 57.6 60+ 8 0.05 9.0 52 <0.05
08/07/13 14:45 Brad Crawford and Dave Pahlas 8.18 <30 18.9 66.0 55 10 0.12 9.4 2800 <0.05
07/10/13 19:40 Brad Crawford 8.32 20.4 68.7 60+ 0.08 14.0 2200 <0.05
06/05/13 16:10 Brad Crawford and Dave Pahlas 8.07 <30 11.7 53.1 39 10 0.13 17.0 2100 <0.05
05/01/13 14:55 Brad Crawford 8.5 <30 13.9 57.0 60+ 12 0.05 12.0 160 <0.05
04/10/13 16:40 Brad Crawford, Dave Pahlas 8.16 <30 4.3 39.7 7 10 0.63 9.8 3300 0.35
11/07/12 18:45 8.68 <33 7.7 45.9 60+ 12 0.04 5.4 52 <0.05
10/03/12 19:20 8.54 <33 13.9 57.0 60+ 12 0.05 6.2 180 <0.05
09/05/12 18:03 7.81 <33 19.3 66.7 2 10 1.5 3.2 24000+ 0.11
08/01/12 20:00 <33 22.8 73.0 60+ 12 0.06 8.2 370 <0.05
08/01/12 20:00 <33 22.8 73.0 60+ 12 0.07 7.5 480 <0.05
07/02/12 14:05 8.07 <33 20.0 68.0 60+ 10 0.12 11.0 760 <0.05
06/06/12 17:55 <33 17.2 63.0 60+ 10 0.05 15.0 200 <0.05
05/02/12 20:00 7.96 <33 16.5 61.7 5 8 0.65 12.0 20000 0.22
04/04/12 18:30 8.55 <33 13.2 55.8 60+ 12 0.04 11.0 10 <0.05
11/02/11 19:00 8.3 <33 9.1 48.4 60+ 10 0.1 7.3 <0.05
11/02/11 19:00 8.3 <33 9.1 48.4 60+ 10 0.06 7.3 140 <0.05
10/05/11 15:15 8.15 <33 10.5 50.9 60+ 10 0.08 8.2 120 <0.05
09/07/11 15:00 8.13 <33 12.5 54.5 60+ 10 0.18 8.9 910 <0.05
08/03/11 13:48 8.0 <33 19.7 67.5 60+ 8 0.11 12.0 1300 0.11
07/06/11 18:45 8.42 <33 23.2 73.8 60+ 9 0.08 11.0 500 <0.05
06/01/11 15:10 8.3 <33 15.7 60.3 55 10 0.13 14.0 1000 <0.05
05/04/11 21:20 8.7 <33 12.9 55.2 60+ 11 0.03 14.0 10 <0.05
  • 06/30/2015: - missing total P bottle
  • 11/02/2011: New Bridge Construction, sampled below bridge
  • 11/02/2011: #2 Bottle Only, New Bridge Construction, sampled below bridge

One-time Rainfall Event Samples for Dry Mill Creek @ Grape Rd (Not part of above statistics)

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
05/30/13 17:45 Brad Crawford & Ross Evelsizer 7.8 15.3 59.5 1.0 14.0 0.08

Nearby Sampling Locations

← Upstream

    Downstream →