2023 Knight’s Creek Biological Monitoring Results

RIVER/STREAM MICROBIOLOGIAL MONITORING REPORT after major wastewater spill.

RIVER/STREAM: KNIGHT’S CREEK

Major Wastewater Spill Location: 1800 block E. Park Ave.

Date of spill: 2/19/23

SAMPLING LOCTIONS:

ABOVE: Knight’s Creek at E. Park Ave. BELOW: Knight’s Creek at Inner Perimeter Rd.

Sampling began on 2/20/2023

	ABOVE		BELOW
Sample Date	Fecal Coliform #cfu/100ml	E. Coli #cfu/100ml	Fecal Coliform #cfu/100ml	E. Coli #cfu/100ml
2/20/23	145	140	180	245
2/21/23	150	110	50	140
2/22/23	145	90	60	130
2/23/23	100	340	650	485
2/24/23	120	325	170	200
2/25/23	60	70	80	120
2/26/23	80	165	65	110
2/27/23	185	130	155	110
2/28/23	60	170	110	115
3/1/23	300	265	160	170
3/2/23	320	190	60	240
3/8/23	100	395	140	100
3/15/23	95	80	270	195
3/22/23	100	125	145	290
3/29/23	235	305	131,600*	112,800*
3/30/23	n/a	n/a	560*	695*
6/13/23	10	30	4,800	1,720
6/21/23	120	160	520	490
6/26/23	370	90	450	270
7/10/23	1,500	200	104,000	14,000
7/11/23	3,000	2,500	120,000	6,000
7/12/23	110	20	1,450	210
7/13/23	85	70	765	300
7/14/23	100	60	12,000	1,115
7/15/23	240	125	70,000	1,500
7/16/23	90	160	72,000	505
7/20/23	240	300	580	200
7/26/23	360	240	340	140
8/04/23	200	310	1800	240
8/9/23	70	110	1000	500
8/23/23	720	200	400	240
8/24/23	220	440	380	310
8/25/23	200	300	220	150
8/26/23	3,500	2,800	38,000	26,000
8/27/23	270	320	51,200	3,400
8/28/23	475	120	2100	175
8/29/23	2000	540	3000	570
9/5/23	6000	2800	1870	3000
9/11/23	265	65	650	70
9/18/23	240	120	220	290
9/25/23	140	40	265	85
9/27/23	7,200	605	13,300	860
10/2/23	1,900	1,550	1,450	1,300
10/9/23	450	700	950	360
10/16/23	200	0	1415	650
10/23/23	165	85	180	170
10/30/23	150	95	180	160
11/6/23	130	40	170	70
12/4/23	6650	915	1995	1345
12/11/23	4360	1550	4040	3200
New Spill Date: 12/14/23	New Spill Date: 12/14/2023	New Spill Date: 12/14/2023	New Spill Date: 12/14/2023	New Spill Date: 12/14/2023
12/15/23	160	350	240	370
12/16/23	410	110	380	440
12/17/23	600	70	1600	280
12/18/23	2450	2625	2910	1730
12/19/23	500	240	1700	810
12/20/23	330	220	820	700
12/21/23	170	290	260	400
12/26/23	95	70	300	200
01/03/24	60	100	365	165
1/08/24	190	220	280	310
Williamsburg Dr. Spill 1/10/24-1/12/24	Williamsburg Dr. Spill 1/10/24-1/12/24	Williamsburg Dr. Spill 1/10/24-1/12/24	Williamsburg Dr. Spill 1/10/24-1/12/24	Williamsburg Dr. Spill 1/10/24-1/12/24
1/12/24	340	240	1340	1620
1/13/24	260	190	640	840
1/14/24	200	120	440	850
1/15/24	20	80	610	420
1/16/24	500	570	295	290
1/17/24	100	100	195	140
1/18/24	ND	ND	160	125
1/22/24	90	30	80	95

cfu (colony forming units) / ml (milliliter)

*3/29/23: high results for BELOW sample. Additional sample collected/analyzed from BELOW sample point. Results showed lower counts of fecal and E. coli. Possible cause of high results on 3/29 was substantial rainfall in area.