Table 4.  Summary statistics by month for water temperature, specific conductance, pH, and dissolved oxygen at Medina River at La Coste, Texas (08180640)

[°C, degrees Celsius; µS/cm, microsiemens per centimeter at 25 degrees Celsius; mg/L, milligrams per liter]
Date
Temperature
(°C)
Specific
conductance
(µS/cm)
pH
(standard units)
Dissolved
oxygen
(mg/L)
 
 
 
Mini-
mum
Maxi-
mum
Mean
Mini-
mum
Maxi-
mum
Mean
Mini-
mum
Maxi-
mum
Mean
Mini-
mum
Maxi-
mum
Mean
Mar. 1996
13.9
17.8
15.8
550
555
553
7.9
8.0
8.0
8.7
  9.9
  9.3
Apr. 1996
14.5
24.0
19.8
533
554
543
7.9
8.1
8.0
6.5
  9.8
  8.0
May 1996
19.3
28.2
24.9
506
541
526
8.0
8.3
8.1
5.5
  8.1
  6.5
June 1996
25.0
29.7
27.5
475
517
504
7.8
8.1
7.9
5.1
  7.3
  6.1
July 1996
27.0
29.6
28.3
410
507
492
7.6
7.9
7.8
5.2
  7.4
  6.3
Aug. 1996
25.2
29.5
27.4
469
525
514
7.6
8.2
7.9
6.0
  7.8
  6.8
Sept. 1996
21.1
27.8
26.0
329
552
503
7.7
8.2
7.9
4.9
  7.9
  6.3
Oct. 1996
17.4
22.9
21.1
542
569
552
7.7
8.0
7.9
6.6
  9.1
  7.6
Nov. 1996
12.2
22.3
17.3
468
552
542
7.8
8.0
7.9
6.8
  9.1
  8.0
Dec. 1996
  7.6
16.3
12.5
526
576
558
7.7
7.9
7.8
7.7
11.0
  9.3
Jan. 1997
  5.8
17.0
10.9
562
584
573
7.8
7.9
7.9
8.2
13.9
11.2
Feb. 1997
10.0
16.5
12.9
507
579
556
7.7
7.8
7.7
8.9
12.3
10.4
Mar. 1997
14.4
21.1
18.0
535
593
571
7.6
7.9
7.7
6.6
10.2
  8.1
Apr. 1997
15.9
21.9
18.9
424
618
557
7.7
7.9
7.8
7.7
10.5
  8.7
May 1997
20.1
26.6
22.9
439
546
527
7.6
7.9
7.8
6.2
8.9
  7.4
June 1997
21.2
28.5
25.5
175
548
459
7.6
8.0
7.8
4.9
  7.8
  6.3
July 1997
25.4
30.1
27.9
370
500
468
7.8
8.1
8.0
5.0
  7.4
  6.8
Aug. 1997
24.3
32.0
28.0
530
582
563
7.8
8.0
7.9
5.1
  9.2
  7.3
Sept. 1997
23.5
27.5
26.1
504
538
521
7.7
8.0
7.9
6.1
  7.7
  6.8
Oct. 1997
16.8
25.1
21.4
430
532
505
7.7
8.0
7.8
6.1
  8.9
  7.5
Nov. 1997
12.9
19.0
15.8
466
519
496
7.7
8.0
7.9
7.9
10.6
  9.3
Dec. 1997
  9.8
16.3
12.5
440
497
477
7.8
8.2
8.0
8.2
12.8
10.7
Jan. 1998
10.8
16.5
13.9
404
484
462
7.9
8.2
8.0
8.5
12.6
10.5
Feb. 1998
13.1
17.6
14.9
364
474
440
7.8
8.1
8.0
8.5
10.6
  9.7
Mar. 1998
12.5
20.5
16.4
230
464
412
7.7
8.1
7.9
8.4
11.7
10.2
Apr. 1998
17.6
22.5
20.1
395
537
461
7.8
8.0
7.9
7.7
  9.5
  8.5
May 1998
20.6
27.1
24.3
503
540
524
7.8
8.1
7.9
6.8
  8.9
  7.6
June 1998
25.4
29.4
27.6
466
514
503
7.7
8.1
7.9
6.5
  8.2
  7.4
July 1998
27.5
29.9
28.5
470
507
500
7.7
7.8
7.7
6.6
  7.9
  7.2
Aug. 1998
25.5
29.4
27.3
296
503
461
7.5
7.8
7.7
6.7
  8.1
  7.4
Sept. 1998
24.5
27.2
26.0
447
522
494
7.6
7.8
7.7
6.6
  8.0
  7.2
Oct. 1998
19.1
26.9
22.6
144
531
472
7.6
7.9
7.7
6.5
  9.0
  7.9
Nov. 1998
17.9
22.6
19.5
387
436
410
7.8
8.2
8.1
7.5
  9.9
  9.1
Dec. 1998
10.6
21.0
15.8
432
485
457
8.2
8.5
8.3
8.1
13.1
10.3

Contents | Back to Text | Table 5