Table 5. Concentrations of nutrients in samples collected at the agriculture indicator site, Medina River at LaCoste
[ft3/s, cubic feet per second; mg/L, milligrams per liter; <, less than; MDL, method detection limit]
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Date | Dis- charge (ft3/s) | Nitrogen, ammonia, dissolved (mg/L) | Nitrogen, nitrite, dissolved (mg/L) | Nitrogen, ammonia plus organic, dissolved (mg/L) | Nitrogen, ammonia plus organic, total (mg/L) | Nitrogen, nitrite plus nitrate, dissolved (mg/L) | Phos- phorus, total (mg/L) |
Phos- phorus, dissolved (mg/L) |
Phosphorus, orthophosphate, dissolved (mg/L) |
|
|||||||||
04-16-96 |
23 |
0.02 |
0.01 |
<0.20 |
0.3 |
2.2 |
0.03 |
0.01 |
0.01 |
05-23-96 |
22 |
.04 |
.01 |
<.20 |
.3 |
1.6 |
.02 |
<.010 |
<.010 |
06-24-96 |
35 |
.05 |
.01 |
<.20 |
.3 |
1.5 |
<.010 |
<.010 |
<.010 |
08-06-96 |
29 |
.02 |
.01 |
<.20 |
.3 |
2 |
.03 |
.03 |
.01 |
09-04-96 |
18 |
<.015 |
.01 |
<.20 |
.3 |
2.1 |
.03 |
<.010 |
<.010 |
10-07-96 |
29 |
<.015 |
<.010 |
<.20 |
<.20 |
3.4 |
<.010 |
<.010 |
<.010 |
11-08-96 |
32 |
.03 |
.02 |
<.20 |
.2 |
2.6 |
<.010 |
<.010 |
<.010 |
12-06-96 |
24 |
<.015 |
.02 |
<.20 |
<.20 |
2.6 |
.06 |
.02 |
<.010 |
01-24-97 |
21 |
<.015 |
.01 |
<.20 |
<.20 |
3.6 |
.03 |
<.010 |
<.010 |
03-05-97 |
26 |
.02 |
<.010 |
<.20 |
.2 |
2.4 |
<.010 |
<.010 |
<.010 |
03-21-97 |
25 |
<.015 |
<.010 |
<.20 |
<.20 |
2.4 |
.04 |
<.010 |
<.010 |
04-08-97 |
33 |
.02 |
.01 |
<.20 |
<.20 |
1.8 |
.01 |
<.010 |
<.010 |
04-16-97 |
32 |
<.015 |
<.010 |
<.20 |
.24 |
1.97 |
.03 |
<.010 |
<.010 |
04-22-97 |
37 |
.094 |
<.010 |
<.20 |
.26 |
1.97 |
.013 |
<.010 |
<.010 |
05-02-97 |
33 |
<.015 |
<.010 |
.2 |
<.20 |
1.74 |
.013 |
0.01 |
<.010 |
05-08-97 |
33 |
<.015 |
<.010 |
<.20 |
.21 |
1.71 |
.024 |
<.010 |
<.010 |
05-14-97 |
36 |
.021 |
.013 |
<.20 |
.23 |
1.24 |
.026 |
<.010 |
<.010 |
05-21-97 |
32 |
.019 |
<.010 |
<.20 |
.23 |
1.49 |
.032 |
<.010 |
<.010 |
05-27-97 |
33 |
.019 |
<.010 |
<.20 |
.25 |
1.56 |
.027 |
<.010 |
<.010 |
06-03-97 |
32 |
<.015 |
<.010 |
<.20 |
<.20 |
1.55 |
.061 |
.036 |
.01 |
06-17-97 |
46 |
<.015 |
<.010 |
<.20 |
.28 |
1.2 |
.026 |
.019 |
.029 |
06-22-97 |
2,760 |
.063 |
<.010 |
.23 |
5.8 |
.577 |
1.34 |
.016 |
.016 |
07-03-97 |
1,050 |
.015 |
<.010 |
.31 |
.3 |
.417 |
<.010 |
<.010 |
<.010 |
07-15-97 |
296 |
.03 |
<.010 |
<.20 |
.23 |
.882 |
<.010 |
<.010 |
.013 |
07-22-97 |
198 |
<.015 |
<.010 |
.26 |
.26 |
1.21 |
.028 |
<.010 |
.013 |
07-30-97 |
102 |
<.015 |
<.010 |
<.20 |
<.20 |
1.69 |
<.010 |
<.010 |
<.010 |
08-05-97 |
78 |
.02 |
.011 |
.24 |
<.20 |
2.48 |
<.010 |
<.010 |
.012 |
08-12-97 |
59 |
<.015 |
.01 |
<.20 |
<.20 |
2.99 |
<.010 |
<.010 |
.015 |
08-19-97 |
54 |
<.015 |
.01 |
<.20 |
<.20 |
3.04 |
<.010 |
<.010 |
<.010 |
08-27-97 |
56 |
<.015 |
.013 |
<.20 |
<.20 |
2.64 |
<.010 |
<.010 |
<.010 |
09-03-97 |
54 |
<.015 |
<.010 |
<.20 |
<.20 |
2.42 |
<.010 |
.016 |
<.010 |
09-10-97 |
52 |
<.015 |
<.010 |
<.20 |
<.20 |
2.51 |
<.010 |
<.010 |
<.010 |
09-16-97 |
49 |
<.015 |
<.010 |
<.20 |
<.20 |
2.48 |
<.010 |
<.010 |
<.010 |
09-24-97 |
54 |
<.015 |
<.010 |
<.20 |
<.20 |
2.52 |
.011 |
<.010 |
<.010 |
10-23-97 |
51 |
<.015 |
<.010 |
<.20 |
<.20 |
2.7 |
<.010 |
<.010 |
<.010 |
Change in MDL for nitrogen, ammonia, dissolved; nitrogen, ammonia plus organic, dissolved; and nitrogen, ammonia plus organic, total for the following analyses; see table 4 |
|||||||||
11-25-97 |
71 |
<.020 |
<.010 |
<.10 |
.11 |
1.93 |
<.010 |
<.010 |
.019 |
12-22-97 |
94 |
<.020 |
<.010 |
.11 |
.15 |
2.59 |
<.010 |
.013 |
.011 |
01-20-98 |
57 |
<.020 |
<.010 |
<.10 |
.12 |
2.27 |
<.010 |
<.010 |
.01 |
02-26-98 |
118 |
<.020 |
<.010 |
.12 |
.23 |
1.25 |
<.010 |
<.010 |
.019 |
03-16-98 |
959 |
.037 |
.037 |
.4 |
1.9 |
1.38 |
.466 |
.012 |
.011 |
03-24-98 |
670 |
.032 |
<.010 |
.11 |
.19 |
.295 |
<.010 |
<.010 |
<.010 |
04-24-98 |
63 |
.033 |
.011 |
.12 |
.12 |
2.44 |
.013 |
.016 |
<.010 |
|
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Forward to: Table 6