ALAMO STP
NPDES ID: TN0024988
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
This quarter: 5 effluent violations.
Violations
April 30, 2026
Nitrogen, ammonia total [as N]
69% over limit
Discharged 1.99532998 kg/d against a permitted limit of 1.18039999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
115% over limit
Discharged 1.678 mg/L against a permitted limit of 0.78 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
109% over limit
Discharged 3.26 mg/L against a permitted limit of 1.56 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
167% over limit
Discharged 3.123 mg/L against a permitted limit of 1.17 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
33% over limit
Discharged 2.59824198 kg/d against a permitted limit of 1.95219998 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
February 28, 2026
BOD, carbonaceous [5 day, 20 C]
70% over limit
Discharged 34 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
223% over limit
Discharged 3.80996797 kg/d against a permitted limit of 1.18039999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
61% over limit
Discharged 1.888 mg/L against a permitted limit of 1.17 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
142% over limit
Discharged 1.888 mg/L against a permitted limit of 0.78 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
392% over limit
Discharged 7.67 mg/L against a permitted limit of 1.56 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 23.2447998 kg/d against a permitted limit of 23.15399981 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
39% over limit
Discharged 13.9 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
95% over limit
Discharged 3.80996797 kg/d against a permitted limit of 1.95219998 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
51% over limit
Discharged 23.2447998 kg/d against a permitted limit of 15.43599987 kg/d (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
BOD, carbonaceous [5 day, 20 C]
87% over limit
Discharged 18.7 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
669% over limit
Discharged 12 mg/L against a permitted limit of 1.56 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
296% over limit
Discharged 3.085 mg/L against a permitted limit of 0.78 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
63% over limit
Discharged 3.17936197 kg/d against a permitted limit of 1.95219998 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
164% over limit
Discharged 3.085 mg/L against a permitted limit of 1.17 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
169% over limit
Discharged 3.17936197 kg/d against a permitted limit of 1.18039999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
25% over limit
Discharged 18.7 mg/L against a permitted limit of 15 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
300% over limit
Discharged 80 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
47% over limit
Discharged 22.69999981 kg/d against a permitted limit of 15.43599987 kg/d (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
BOD, carbonaceous [5 day, 20 C]
10% over limit
Discharged 22 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, ammonia total [as N]
84% over limit
Discharged 1143 mg/L against a permitted limit of 620 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
47% over limit
Discharged 1.143 mg/L against a permitted limit of 0.78 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
47% over limit
Discharged 0.93251599 kg/d against a permitted limit of 0.63559999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
179% over limit
Discharged 1143 mg/L against a permitted limit of 410 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
139% over limit
Discharged 3.73 mg/L against a permitted limit of 1.56 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
10% over limit
Discharged 22 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
366% over limit
Discharged 3730 mg/L against a permitted limit of 800 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
BOD, carbonaceous [5 day, 20 C]
7% over limit
Discharged 10.7 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
148% over limit
Discharged 1537 mg/L against a permitted limit of 620 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
275% over limit
Discharged 1537 mg/L against a permitted limit of 410 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
433% over limit
Discharged 4260 mg/L against a permitted limit of 800 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
50% over limit
Discharged 30 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
131% over limit
Discharged 1.46778199 kg/d against a permitted limit of 0.63559999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
54% over limit
Discharged 1.46778199 kg/d against a permitted limit of 0.95339999 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, ammonia total [as N]
42% over limit
Discharged 1.35382799 kg/d against a permitted limit of 0.95339999 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
243% over limit
Discharged 1406 mg/L against a permitted limit of 410 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
127% over limit
Discharged 1406 mg/L against a permitted limit of 620 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
113% over limit
Discharged 1.35382799 kg/d against a permitted limit of 0.63559999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
853% over limit
Discharged 7620 mg/L against a permitted limit of 800 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2025
BOD, carbonaceous [5 day, 20 C]
135% over limit
Discharged 23.5 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1421% over limit
Discharged 9430 mg/L against a permitted limit of 620 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
125% over limit
Discharged 33.7 mg/L against a permitted limit of 15 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1104% over limit
Discharged 9630 mg/L against a permitted limit of 800 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
583% over limit
Discharged 4.33978596 kg/d against a permitted limit of 0.63559999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
15% over limit
Discharged 26.74059978 kg/d against a permitted limit of 23.15399981 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
1279% over limit
Discharged 212.83519821 kg/d against a permitted limit of 15.43599987 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
150% over limit
Discharged 50 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1055% over limit
Discharged 4735 mg/L against a permitted limit of 410 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
835% over limit
Discharged 8.91201993 kg/d against a permitted limit of 0.95339999 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, ammonia total [as N]
180% over limit
Discharged 4.70389396 kg/d against a permitted limit of 1.67979999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
310% over limit
Discharged 4.514 mg/L against a permitted limit of 1.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
112% over limit
Discharged 21.2 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
3% over limit
Discharged 84.5 % against a permitted limit of 85 % (AVG MN)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
41% over limit
Discharged 21.2 mg/L against a permitted limit of 15 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
50% over limit
Discharged 23.10859981 kg/d against a permitted limit of 15.43599987 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
55% over limit
Discharged 4.70389396 kg/d against a permitted limit of 3.04179997 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
126% over limit
Discharged 4.514 mg/L against a permitted limit of 2 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
348% over limit
Discharged 11.2 mg/L against a permitted limit of 2.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
110% over limit
Discharged 42 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Nitrogen, ammonia total [as N]
177% over limit
Discharged 4.65259196 kg/d against a permitted limit of 1.67979999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
187% over limit
Discharged 8.74086193 kg/d against a permitted limit of 3.04179997 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
33% over limit
Discharged 20 % against a permitted limit of 40 % (DAILY MN)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
10% over limit
Discharged 5.4 mg/L against a permitted limit of 6 mg/L (INST MIN)
DMR, Limited - Numeric Violation
BOD, carbonaceous, percent removal
24% over limit
Discharged 81.4 % against a permitted limit of 85 % (AVG MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
203% over limit
Discharged 3.331 mg/L against a permitted limit of 1.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
138% over limit
Discharged 23.8 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
210% over limit
Discharged 62 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
227% over limit
Discharged 49 mg/L against a permitted limit of 15 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
200% over limit
Discharged 0.06 mg/L against a permitted limit of 0.02 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
17% over limit
Discharged 82.5 % against a permitted limit of 85 % (AVG MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
271% over limit
Discharged 7.417 mg/L against a permitted limit of 2 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
920% over limit
Discharged 25.5 mg/L against a permitted limit of 2.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
146% over limit
Discharged 56.97699952 kg/d against a permitted limit of 23.15399981 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
128% over limit
Discharged 35.1849997 kg/d against a permitted limit of 15.43599987 kg/d (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrogen, ammonia total [as N]
141% over limit
Discharged 6.02 mg/L against a permitted limit of 2.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
185% over limit
Discharged 8.67139993 kg/d against a permitted limit of 3.04179997 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
72% over limit
Discharged 1.892 mg/L against a permitted limit of 1.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
350% over limit
Discharged 0.09 mg/L against a permitted limit of 0.02 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
25% over limit
Discharged 25 % against a permitted limit of 40 % (DAILY MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
72% over limit
Discharged 2.88698598 kg/d against a permitted limit of 1.67979999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
167% over limit
Discharged 5.34 mg/L against a permitted limit of 2 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Nitrogen, ammonia total [as N]
240% over limit
Discharged 10.19 mg/L against a permitted limit of 3 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
70% over limit
Discharged 3.395 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
140% over limit
Discharged 9.6 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
50% over limit
Discharged 4.54771796 kg/d against a permitted limit of 3.04179997 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
51% over limit
Discharged 34.91259971 kg/d against a permitted limit of 23.15399981 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
40% over limit
Discharged 21 mg/L against a permitted limit of 15 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
250% over limit
Discharged 16.03527987 kg/d against a permitted limit of 4.58539996 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
850% over limit
Discharged 0.19 mg/L against a permitted limit of 0.02 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
25% over limit
Discharged 25 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
82% over limit
Discharged 0.02 mg/L against a permitted limit of 0.011 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
BOD, carbonaceous [5 day, 20 C]
28% over limit
Discharged 19.79439983 kg/d against a permitted limit of 15.43599987 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
48% over limit
Discharged 14.8 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
250% over limit
Discharged 70 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
262% over limit
Discharged 7.237 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
246% over limit
Discharged 10.53506991 kg/d against a permitted limit of 3.04179997 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
285% over limit
Discharged 15.4 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
115% over limit
Discharged 49.66759958 kg/d against a permitted limit of 23.15399981 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
519% over limit
Discharged 28.40632576 kg/d against a permitted limit of 4.58539996 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
388% over limit
Discharged 14.633 mg/L against a permitted limit of 3 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
102% over limit
Discharged 30.3 mg/L against a permitted limit of 15 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
E. coli
157% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 941 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Chlorine, total residual
82% over limit
Discharged 0.02 mg/L against a permitted limit of 0.011 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
117% over limit
Discharged 8.67 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
400% over limit
Discharged 0.1 mg/L against a permitted limit of 0.02 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Chlorine, total residual
250% over limit
Discharged 0.07 mg/L against a permitted limit of 0.02 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Chlorine, total residual
82% over limit
Discharged 0.02 mg/L against a permitted limit of 0.011 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
350% over limit
Discharged 0.09 mg/L against a permitted limit of 0.02 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2024
BOD, carbonaceous [5 day, 20 C]
15% over limit
Discharged 23 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
250% over limit
Discharged 0.07 mg/L against a permitted limit of 0.02 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
82% over limit
Discharged 0.02 mg/L against a permitted limit of 0.011 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Chlorine, total residual
82% over limit
Discharged 0.02 mg/L against a permitted limit of 0.011 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
400% over limit
Discharged 0.1 mg/L against a permitted limit of 0.02 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
Chlorine, total residual
850% over limit
Discharged 0.19 mg/L against a permitted limit of 0.02 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
82% over limit
Discharged 0.02 mg/L against a permitted limit of 0.011 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2024
Chlorine, total residual
450% over limit
Discharged 0.11 mg/L against a permitted limit of 0.02 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
187% over limit
Discharged 7.18 mg/L against a permitted limit of 2.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
82% over limit
Discharged 0.02 mg/L against a permitted limit of 0.011 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
173% over limit
Discharged 5.453 mg/L against a permitted limit of 2 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
145% over limit
Discharged 2.698 mg/L against a permitted limit of 1.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
78% over limit
Discharged 5.40078395 kg/d against a permitted limit of 3.04179997 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
50% over limit
Discharged 2.51833798 kg/d against a permitted limit of 1.67979999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)