Upper Iowa River Watershed Water Quality Database

Waterloo Creek [26-WAT-10]

Name	Waterloo Creek
Code	26-WAT-10
County	Allamakee
Latitude	43.4328
Longitude	-91.5194
Sampled by	Iowa DNR Fisheries ~ Guttenberg Hatchery

Sampling Location

Yearly Averages for Waterloo Creek [26-WAT-10] Download in CSV format
(with comparison to all locations in the watershed)

How to read the table below:

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	Celsius C	Fahrenheit F	Transparency cm	P mg/L	N mg/L	E. Coli MPN/100mL	Ammonia mg/L	Flow cfs	Atrazine ppb	Fecal Coliform /100mL	Chloride mg/L	Sulfate mg/L	Total Suspended Solids mg/L
All Years	8.4 (8.2)	15.5 (14.9)	59.8 (58.9)	60+ (60+)	0.1 (0.12)	4.1 (5.6)	154 (272)	<0.05 (0.07)	26.49 (18.32)	0.06 (0.14)	19 (13321)	9.72 (14.45)	12.75 (14.65)	33 (19)
2022 Mean	7.8 (7.9)	17.3 (15.9)	63.1 (60.7)	60 (60+)	0.06 (0.09)	4.1 (6.1)	144 (250)					9.47 (14.69)	14.19 (15.44)	5 (14)
2021 Mean	8.1 (8.1)	14.7 (15.5)	58.5 (59.8)	60+ (60+)	0.04 (0.06)	4.5 (4.5)	112 (166)					10.17 (13.83)	13.76 (16.38)	9 (7)
2020 Mean	8.2 (8.1)	12.8 (13.0)	55.0 (55.5)	60+ (60+)	0.03 (0.06)	4.4 (5.2)	51 (121)					9.1 (13.01)	12.53 (14.7)	5 (10)
2019 Mean	8.1 (7.9)	13.9 (13.9)	57.1 (57.0)	60+ (60+)	0.07 (0.11)	4.3 (5.6)	92 (189)					8.49 (12.79)	12.57 (13.72)	6 (10)
2018 Mean	8.4 (8.2)	14.6 (14.1)	58.3 (57.4)	45 (43)	0.73 (0.26)	4.1 (6.1)	419 (391)					10.57 (14.8)	12.59 (13.58)	208 (72)
2017 Mean	8.3 (8.1)	14.2 (14.7)	57.5 (58.4)	60+ (59)	0.08 (0.12)	4.0 (5.7)	192 (359)					10.09 (15.39)	12.13 (14.51)	9 (15)
2016 Mean	8.5 (8.2)	15.7 (15.1)	60.2 (59.2)	60+ (60+)	0.07 (0.12)	4.0 (7.3)	175 (236)					10.3 (16.26)	12.85 (14.3)	6 (14)
2015 Mean	8.6 (8.4)	15.6 (15.1)	60.1 (59.1)	60+ (60+)	0.05 (0.09)	4.0 (5.8)	70 (197)					9.6 (15.12)	10.43 (14.49)	2 (5)
2014 Mean	8.6 (8.2)	14.3 (13.9)	57.7 (57.0)	56 (48)	0.09 (0.16)	4.4 (6.2)	237 (479)
2013 Mean	8.4 (8.2)	14.1 (13.9)	57.4 (57.0)	41 (49)	0.18 (0.14)	4.2 (6.3)	255 (437)	0.07 (0.08)
2012 Mean	8.4 (8.3)	16.5 (16.3)	61.8 (61.4)	60+ (60+)	0.05 (0.09)	4.2 (3.7)	105 (230)	<0.05 (0.06)
2011 Mean	8.9 (8.4)	17.6 (16.9)	63.7 (62.5)	60+ (60+)	0.04 (0.08)	4.6 (5.5)	44 (214)	<0.05 (<0.05)
2010 Mean	8.5 (8.0)	15.0 (13.9)	59.0 (57.0)	60+ (60+)	0.06 (0.1)	4.2 (6.1)	669 (436)	<0.05 (<0.05)
2009 Mean	8.3 (8.2)	13.8 (13.4)	56.8 (56.1)	60+ (60+)	0.04 (0.08)	4.2 (4.3)	134 (204)	<0.05 (0.05)
2008 Mean	8.1 (8.1)	16.3 (15.0)	61.3 (59.1)	60+ (58)	0.05 (0.12)	4.6 (5.7)	154 (357)	<0.05 (0.09)		(0.09)
2007 Mean	8.3 (8.1)	16.7 (15.4)	62.1 (59.8)	60+ (53)	0.05 (0.22)	4.0 (6.2)	418 (745)	<0.05 (0.06)		(0.11)
2006 Mean	8.6 (8.2)	18.9 (16.5)	66.0 (61.7)	60+ (56)	0.05 (0.14)	3.4 (5.3)	183 (388)	<0.05 (<0.05)		(0.12)
2005 Mean	8.5 (8.5)	18.3 (16.6)	64.9 (61.9)	57 (55)	0.06 (0.11)	3.2 (5.3)	107 (180)	<0.05 (0.11)	26.49 (18.32)	(0.14)
2004 Mean					0.05 (0.1)	3.3 (5.4)	129 (170)	<0.05 (0.05)		(0.19)
2002 Mean					0.04 (0.21)	3.7 (5.9)		<0.05 (0.15)		0.05 (0.09)	<10 (11159)
2001 Mean					(0.14)	(12.6)		(0.1)		(0.54)	(10137)
2000 Mean					0.3 (0.41)	4.2 (4.8)		0.08 (0.12)		0.07 (0.21)	40 (18412)

*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 0.0% 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 39.2% 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 Waterloo Creek [26-WAT-10]

Sample Date	Time	by	pH	Celsius C	Fahrenheit F	Transparency cm	P mg/L	N mg/L	E. Coli MPN/100mL	Ammonia mg/L	Flow cfs	Atrazine ppb	Fecal Coliform /100mL	Chloride mg/L	Sulfate mg/L	Total Suspended Solids mg/L
10/11/22	13:15	Kevin Hanson	8.3	12.1	53.8	60+	0.04	4.5	63					8.8	13.2	2.8
09/13/22	12:45	Kevin Hanson					0.03	4.2	75					8.5	12.1	3.2
08/09/22	12:00	Kevin Hanson	6.57	17.0	62.6	60+	0.08	4.3	545					10.5	14.3	1.2
07/12/22	13:39			20.2	68.4	60+	0.03	4.3	420					10.1	14.3	5.2
06/14/22	14:23	Kevin Hanson		21.4	70.5	31	0.07	4.2	1989					10.3	13.7	10.8
05/10/22	13:00	Kevin Hanson	8.45	15.7	60.3	38	0.07	1.9	75					7.6	16.5	2.4
04/12/22	09:51	Ross Evelsizer				60+	0.07	5.0	<10					10.5	15.2	6.8
10/12/21	13:15	Kevin Hanson		13.7	56.7	58	0.05	4.6	145					9.9	13.5	1.6
09/14/21	12:25	Kevin Hanson	8.25	15.0	59.0	60+	0.05	4.5	146					10.4	13.2	4
08/10/21	11:45	Kevin Hanson	7.86	17.6	63.7	60+	0.04	4.1	2359					9.9	13.8	3.5
07/13/21	12:35	Kevin Hanson	7.8	18.7	65.7	60+	0.06	4.3	131					11.1	14.3	6.8
06/08/21	11:25	Kevin Hanson	8.26	19.7	67.5	60+	0.03	4.7	341					9.9	13.7	10
05/11/21	12:40	Kevin Hanson	8.14	11.8	53.2	51	0.03	4.5	10					9.6	13.5	22.4
04/13/21	10:30	Josh Dansdill		6.7	44.0	60+	0.02	4.9	10					10.4	14.3	14.4
10/13/20	13:55	Kevin Hanson	8.65	12.2	54.0	60+	0.04	2.0	10					5.4	6.0	6
09/08/20	13:06	Kevin Hanson	8.34	11.6	52.9	60+	0.04	5.1	145					10.0	14.0	4.8
08/11/20	13:30	Denver Link	8.38	15.8	60.4	60+	0.02	4.9	63					9.5	13.6	2.4
07/14/20	11:30	Denver Link	7.66	16.4	61.5	60+	0.04	4.6	536					9.2	13.5	6
06/09/20	11:30	Denver Link	7.85	15.5	59.9	60+	0.03	4.7	275					10.4	13.2	6
05/12/20	13:10	Kevin Hanson	8.26	11.5	52.7	57	0.02	4.6	<10					9.8	13.7	7.2
04/14/20	13:40	Kevin Hanson	8.15	6.6	43.9	60+	0.03	5.2	<10					9.4	13.7	3
10/08/19	12:30	Kevin Hanson	8.43	11.1	52.0	60+	0.08	4.9	243					9.2	13.1	7.6
09/10/19	11:50	Josh Dansdill		13.3	56.0	60+	0.08	5.0	181					9.0	13.5	13.2
08/13/19	11:30	Dakota	8.05	14.6	58.3	60+	0.06	4.8	259					9.2	11.7	3.2
07/09/19	14:00		8.15	17.2	63.0	60	0.07	4.6	145					9.2	13.0	5
06/11/19	13:15	Kevin Hanson	7.8	13.1	55.6	59	0.06	4.2	216					9.4	13.1	2
05/14/19	12:15	Karen Osterkamp	8.3	14.1	57.4	60+		1.8	20					4.4	10.2	0
04/09/19	00:00						0.08	4.7	<10					9.0	13.4	13.6
10/09/18	12:37	Tori Nimrod	8.63	14.8	58.6	1.4	4.57	2.3	24196+					8.5	7.3	1392
09/11/18	13:20	Theresa Shay & Kevin Hanson	8.11	15.2	59.4	37	0.1	4.7	537					10.9	14.0	11.6
08/14/18	12:15	Kevin Hanson	8.22	17.1	62.8	60+	0.06	4.6	122					11.8	14.8	0
07/10/18	12:30	Kevin Hanson	8.35	18.6	65.5	60+	0.07	4.7	122					11.5	14.2	6.5
06/12/18	12:43	Kevin Hanson	8.26	15.3	59.5	21	0.18	4.2	4352					9.3	12.2	30
05/08/18	12:10	Kevin Hanson	8.38	14.4	57.9	42	0.09	4.0	279					11.8	13.1	11
04/17/18	12:55	Kevin Hanson	9.1	7.0	44.6	60+	0.07	4.4	<10					10.2	12.5	3
10/10/17	13:10		8.3	11.1	52.0	60+	0.08	4.5	161					10.3	13.4	3.6
09/12/17	12:45	Karen Osterkamp	8.55	16.9	62.4	60+	0.09	1.3	63					3.9	10.5	1.2
08/08/17	12:40	Kevin Hanson	8.37	16.4	61.5	60+	0.07	4.7	148					9.7	13.0	2.4
07/11/17	00:00	Guttenberg AIS	8.37	16.6	61.9	59	0.08	4.5	279					9.9	12.5	4.5
06/13/17	12:30	Kevin Hanson	8.37	18.3	64.9	60+	0.07	4.7	471					19.9	12.7	6
05/09/17	13:00	Kevin Hanson	8.27	12.2	54.0	13	0.1	4.3	4884					8.6	11.0	44
04/11/17	12:13	Ross Evelsizer	8.11	7.8	46.0	60+	0.06	3.9	10					8.3	11.8	2.8
10/11/16	00:00	Kevin Hanson
09/13/16	14:00	Kevin Hanson	8.26	15.5	59.9	47	0.11	4.0	816					10.0	13.1	11.8
08/09/16	10:54	Sindelar - Guttenberg	8.39	17.1	62.8	60+	0.07	3.9	414					10.4	13.1	5.7
07/12/16	12:05	R. Sindelar	8.47	20.2	68.4	60+	0.04	3.6	160					10.5	12.8	3.8
06/14/16	12:10	Kevin Hanson	8.42	17.3	63.1	39	0.09	3.8	677					10.7	12.7	12.3
06/07/16	13:20		8.59	17.7	63.9	60+
05/10/16	13:30	Kevin Hanson	8.44	12.9	55.2	60+	0.06	4.1	243					10.3	12.2	2
04/12/16	12:06	Ross Evelsizer	8.7	9.1	48.4	60+	0.06	4.5	<4					9.9	13.2	1.5
10/06/15	12:40	Kevin Hanson	8.75	13.2	55.8	60+	0.04	4.4	122					9.7	13.4	3.2
09/01/15	13:30	Kevin Hanson	9.09	20.5	68.9	60+	0.05	4.2	63					9.5	4.3	3.2
08/04/15	12:19	Josh Dansdill	8.5	18.4	65.1	60+	0.06	3.5	75					9.1	12.1	1.8
07/07/15	13:10	Kevin Hanson	8.55	17.3	63.1	60+	0.07	4.0	617					10.1	11.9	0.3
06/03/15	12:59	Kevin Hanson	8.86	16.3	61.3	60+	0.05	3.8	31
05/05/15	13:15	Kevin Hanson	8.44	14.3	57.7	60+	0.03	3.6	98
04/07/15	12:50	Kevin Hanson	8.25	9.5	49.1	60+	0.03	4.3	<10
10/07/14	12:50	Kevin Hanson	8.57	11.8	53.2	60+	0.04	4.4	52
09/02/14	13:10	Kevin Hanson	8.39	17.3	63.1	60+	0.05	4.4	150
08/05/14	11:40	Kevin Hanson	8.69	16.3	61.3	60+	0.07	4.3	880
07/08/14	12:31	Kevin Hanson	8.86	19.2	66.6	54	0.04	4.4	1100
06/03/14	13:00	Kevin Hanson	8.59	17.8	64.0	8	0.28	4.1	14000
05/06/14	12:30	Kevin Hanson	8.59	12.1	53.8	60+	0.02	4.3	20
04/01/14	11:50	Bill Kalishek	8.4	5.5	41.9	45	0.15	4.6	20
10/01/13	12:45	Kevin Hanson	8.55	15.7	60.3	60	0.03	5.1	110	<0.05
09/03/13	13:30	Kevin Hanson	8.6	15.5	59.9	60	0.03	5.0	130	<0.05
08/06/13	12:30	Kevin Hanson	8.35	17.3	63.1	40	0.06	4.6	300	0.08
07/09/13	00:00	Kevin Hanson	8.15	19.2	66.6	1	0.96	2.6	24000+	0.08
06/04/13	00:00	Adam Grim & Crystal Krapfl	8.3	12.9	55.2	25	0.08	4.1	1400	0.17
05/07/13	00:00	Kevin Hanson	8.66	10.8	51.4	60+	0.04	4.1	20	<0.05
04/09/13	00:00	Josh Dansdill	8.2	7.3	45.1	32	0.09	4.0	20	<0.05
10/02/12	18:30	Kevin Hanson	8.62	14.2	57.6	60+	0.02	4.3	86	<0.05
09/04/12	17:30	Kevin Hanson	8.34	20.0	68.0	60+	0.08	4.2	1600	<0.05
08/07/12	12:15	Kevin Hanson	8.13	16.0	60.8	60+	0.04	4.2	180	<0.05
07/02/12	17:24						0.07	4.2	1200	<0.05
06/05/12	17:17	Dan Weber	8.52	20.5	68.9	60+	0.06	3.5	75	<0.05
05/01/12	17:50	Kevin Hanson	8.52	13.0	55.4	60+	0.04	4.2	<10	<0.05
04/03/12	18:15	Kevin Hanson	8.5	15.5	59.9	60+	0.03	4.5	<10	<0.05
10/04/11	17:15						0.05	5.0	31	<0.05
09/06/11	19:05	Nikki Schlitter	8.98	14.5	58.1	60+	0.06	4.9	20	<0.05
08/02/11	18:00	Kevin Hanson	9.0	21.2	70.2	60+	0.05	4.6	150	<0.05
07/05/11	17:50	Kevin Hanson	8.9	20.4	68.7	60+	0.03	4.2	330	<0.05
06/07/11	18:17	Kevin Hanson	8.8	22.5	72.5	60+	0.04	4.5	31	<0.05
05/03/11	17:30		8.6	9.4	49.0	60+	0.02	4.6	<10	<0.05
10/05/10	16:50		8.6	12.9	55.3	60+	0.05	5.1	890	<0.05
09/06/10	19:00	Aaron Schwartzhoff	8.5	13.2	55.8	60+	0.08	4.8	3600	<0.05
08/03/10	17:40	Aaron Schwartzhoff	8.4	18.8	65.8	60+	0.04	4.3	400	<0.05
07/06/10	18:13	Kevin Hanson				20	0.17	3.9	280000	0.08
06/01/10	15:55	Aaron Schwartzhoff				60+	0.03	3.7	98	<0.05
05/04/10	17:15	Kevin Hanson				60+	0.03	3.8	10	0.06
04/06/10	17:40	Aaron Schwartzhoff				60+	0.03	3.9	170	<0.05
10/06/09	16:40		8.13	10.6	51.1	60+	0.05	4.2	340	<0.05
09/01/09	16:45						0.04	4.1	140	<0.05
08/04/09	17:15		8.3	18.4	65.1	60+	0.04	4.1	230	<0.05
07/08/09	16:10		8.1	15.2	59.4	60+	0.03	4.1	720	<0.05
06/02/09	17:15		8.46	17.7	63.9	60+	0.04	4.1	84	<0.05
05/05/09	17:00		8.34	13.9	57.0	60+	0.03	4.2	150	<0.05
04/07/09	16:25		8.31	6.7	44.1	60+	0.03	4.8	<10	<0.05
10/07/08	18:05						0.03	4.7	110	<0.05
09/02/08	17:00		8.21	21.2	70.2	60+	0.06	5.0	340	<0.05
08/05/08	16:15		7.36	17.7	63.9	60+	0.06	5.1	1300	<0.05
07/01/08	18:00		8.23	20.6	69.1	60+	0.03	4.3	30	<0.05
06/03/08	17:05		8.35	16.0	60.8	60+	<0.02	4.5	440	<0.05
05/06/08	18:00	Scott Gritters	8.28	16.1	61.0	60+	0.05	4.4	<10	<0.05
04/01/08	16:25	Aaron Schwartzhoff		6.1	43.0	46	0.1	4.4	400	0.05
10/16/07	18:00		8.38	14.6	58.3	60+	0.04	4.8	470	<0.05
09/04/07	17:30		8.27	20.9	69.6	47	0.06	3.8	510	<0.05
08/07/07	16:45		8.3	21.0	69.8	60+	0.03	4.0	2500	<0.05
07/02/07	18:30		8.57	19.7	67.5	60+	0.05	4.1	200	<0.05
06/05/07	17:00		8.41	16.6	61.9	44	0.08	3.7	3200	<0.05
05/01/07	16:00		8.38	14.6	58.3	60+	0.02	3.3	73	<0.05
04/03/07	16:25		8.0	9.7	49.5	55	0.05	4.0	80	<0.05
10/03/06	16:00		8.35	14.8	58.6	60+		3.4	390	<0.05
09/05/06	16:10					60+	0.04	3.7	290	<0.05
08/01/06	17:50					60+	0.04	3.4	180	<0.05
07/05/06	19:09		8.83	22.9	73.2	60+	0.04	3.2	170	<0.05
06/06/06	18:09		8.37	21.8	71.2	19	0.11	3.0	31000	<0.05
05/02/06	17:25		8.69	16.0	60.8	60+	0.03	3.7	<10	<0.05
04/04/06	17:15					60+	0.05	3.5	<10	<0.05
10/04/05	16:45		8.3	20.9	69.6	60+	0.11	3.5	320	<0.05	26.26
09/06/05	18:50		8.38	22.3	72.1		0.07	3.1	140	<0.05
08/02/05	17:00		8.02	18.2	64.8	1.5	0.06	3.2	540	<0.05	26.09
07/05/05	20:00		8.5	23.2	73.8	54	0.03	3.0	210	<0.05
06/07/05	19:25		8.8	10.8	51.4	60+	0.08	3.1	170	0.05	27.0
05/03/05	18:33		8.58	16.3	61.3	60+	0.04	3.4	10	<0.05	26.62
04/06/05	18:00		8.58	16.3	61.3	60+	0.05	3.4	18	<0.05
10/26/04	17:55						0.07	3.7	170	<0.05
09/28/04	18:00						0.03	3.5	170	<0.05
08/31/04	17:15						0.04	3.3	530	<0.05
07/27/04	17:45						0.04	3.3	410	<0.05
06/30/04	18:30						0.06	3.1	90	<0.05
04/27/04	17:30						0.05	2.9	<10	<0.05
05/02/02	17:26						<0.05	3.2		<0.05		0.06	<10.0
01/30/02	20:05						<0.05	4.1		<0.05		<0.05	10.0
10/11/00	18:35						0.3	4.2		<0.1		0.07	40.0

09/13/2022: No field data recorded on form
06/14/2022: pH Meter Not Calibrated
04/09/2019: Field sheet missing
05/09/2017: overcast, temps mid 50s. T-storms overnight over UIR, dropping variable amounts of rain (0.10 - 1.33 inches in Dorchester)
10/11/2016: Road construction at site, could not get sample
07/12/2016: Road construction on bridge directly downstream ~ 20 yds
08/04/2015: Low & clear
06/03/2015: Data from 6/3/2015 (Regular Sampling date was 6/2/2015. No rain event occurred overnight.)
05/06/2014: ph meter may not be working properly
04/01/2014: Slightly High and Turbid
05/07/2013: Low and Clear
06/05/2012: Difficult to obtain clean sample
05/03/2011: Clear - normal flow
09/06/2010: Slightly high, 60+ but off-color
08/03/2010: a little high, 60+ but not crystal clear
06/01/2010: Normal Flow
04/01/2008: Looks Pretty Good, Recent Rain

One-time Rainfall Event Samples for Waterloo Creek (Not part of above statistics)

Sample Date	Time	pH	Celsius C	Fahrenheit F	Transparency cm	P mg/L	N mg/L	E. Coli MPN/100mL	Ammonia mg/L	Atrazine ppb	Fecal Coliform /100mL
03/14/07	15:30				7	0.79	1.6	4100	1.2
07/25/05	19:10	8.93	20.6	69.1	50	0.14	3.3	3200	0.1
05/25/04	18:25
05/25/04	18:25					0.09	3.0	800	0.06
07/29/02	17:45					<0.05	3.0		<0.05	0.05	1200.0
06/04/02	15:45					0.19	2.8		<0.05	0.46	21000.0
06/15/01	16:35					<0.1	3.4		<0.1	0.56	3900.0
04/03/01	17:43					<0.1	3.9		<0.1	0.05	10.0
08/17/00	19:00					<0.1	3.3		<0.1	0.11	7200.0
07/05/00	20:30					0.1	3.2		<0.1	0.08	420.0
05/18/00	20:55					0.6	2.9		0.2	0.79	110000.0
02/24/00	19:45					0.6	2.6		3.4	0.07	1700.0

Nearby Sampling Locations

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Bear Creek