CITY OF BISHOP WWTP
NPDES ID: TX0023019
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: 11 effluent violations.
Violations
May 31, 2026
E. coli
58% over limit
Discharged 630 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
E. coli
63% over limit
Discharged 205 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
57% over limit
Discharged 56.84079952 kg/d against a permitted limit of 36.32 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
120% over limit
Discharged 66 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
40% over limit
Discharged 140 mg/L against a permitted limit of 100 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
April 30, 2026
E. coli
114% over limit
Discharged 269.5 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
506% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
Solids, total suspended
23% over limit
Discharged 111 mg/L against a permitted limit of 90 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, total suspended
12% over limit
Discharged 101 mg/L against a permitted limit of 90 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
27% over limit
Discharged 38 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
February 28, 2026
BOD, carbonaceous [5 day, 20 C]
40% over limit
Discharged 42 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
1% over limit
Discharged 127.6 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
2% over limit
Discharged 6.1 mg/L against a permitted limit of 6 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
January 31, 2026
E. coli
506% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
E. coli
1358% over limit
Discharged 1837.3 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
185% over limit
Discharged 17.1 mg/L against a permitted limit of 6 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
30% over limit
Discharged 9.44319992 kg/d against a permitted limit of 7.264 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
37% over limit
Discharged 20.6 mg/L against a permitted limit of 15 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
December 31, 2025
E. coli
1513% over limit
Discharged 2032.7 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
215% over limit
Discharged 18.9 mg/L against a permitted limit of 6 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
39% over limit
Discharged 20.8 mg/L against a permitted limit of 15 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
E. coli
506% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
37% over limit
Discharged 9.94259992 kg/d against a permitted limit of 7.264 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
November 30, 2025
E. coli
334% over limit
Discharged 1732.9 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
E. coli
493% over limit
Discharged 747.7 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
52% over limit
Discharged 9.1 mg/L against a permitted limit of 6 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
October 31, 2025
Oxygen, dissolved [DO]
15% over limit
Discharged 5.13 mg/L against a permitted limit of 6 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
13% over limit
Discharged 6.8 mg/L against a permitted limit of 6 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
13% over limit
Discharged 34 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
2% over limit
Discharged 92 mg/L against a permitted limit of 90 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
4% over limit
Discharged 416 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
E. coli
80% over limit
Discharged 227.4 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
September 30, 2025
Oxygen, dissolved [DO]
39% over limit
Discharged 3.65 mg/L against a permitted limit of 6 mg/L (MO MIN)
DMR, Limited - Numeric Violation
E. coli
135% over limit
Discharged 295.8 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
506% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
47% over limit
Discharged 44 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
41% over limit
Discharged 127 mg/L against a permitted limit of 90 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
August 31, 2025
BOD, carbonaceous [5 day, 20 C]
117% over limit
Discharged 65 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
270% over limit
Discharged 466.1 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
36% over limit
Discharged 3.85 mg/L against a permitted limit of 6 mg/L (MO MIN)
DMR, Limited - Numeric Violation
E. coli
506% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
Solids, total suspended
31% over limit
Discharged 118 mg/L against a permitted limit of 90 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
33% over limit
Discharged 145.27999878 kg/d against a permitted limit of 108.95999908 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
149% over limit
Discharged 90.25519924 kg/d against a permitted limit of 36.32 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
July 31, 2025
Oxygen, dissolved [DO]
10% over limit
Discharged 5.43 mg/L against a permitted limit of 6 mg/L (MO MIN)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
70% over limit
Discharged 51 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
54% over limit
Discharged 613.1 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
Solids, total suspended
6% over limit
Discharged 95 mg/L against a permitted limit of 90 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
June 30, 2025
E. coli
16% over limit
Discharged 146.2 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
17% over limit
Discharged 35 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
18% over limit
Discharged 106 mg/L against a permitted limit of 90 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
105% over limit
Discharged 816.4 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
May 31, 2025
E. coli
705% over limit
Discharged 1014.2 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
63% over limit
Discharged 49 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
506% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
April 30, 2025
BOD, carbonaceous [5 day, 20 C]
30% over limit
Discharged 39 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
506% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
Solids, total suspended
38% over limit
Discharged 124 mg/L against a permitted limit of 90 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
15% over limit
Discharged 6.9 mg/L against a permitted limit of 6 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
37% over limit
Discharged 41 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
February 28, 2025
E. coli
506% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
87% over limit
Discharged 56 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
3% over limit
Discharged 15.5 mg/L against a permitted limit of 15 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
147% over limit
Discharged 14.8 mg/L against a permitted limit of 6 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
1070% over limit
Discharged 1474.4 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
January 31, 2025
E. coli
506% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
75% over limit
Discharged 26.3 mg/L against a permitted limit of 15 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
70% over limit
Discharged 12.3487999 kg/d against a permitted limit of 7.264 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
395% over limit
Discharged 624.2 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
270% over limit
Discharged 22.2 mg/L against a permitted limit of 6 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
December 31, 2024
E. coli
302% over limit
Discharged 505.9 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
153% over limit
Discharged 15.2 mg/L against a permitted limit of 6 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
506% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
45% over limit
Discharged 21.8 mg/L against a permitted limit of 15 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.79 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
25% over limit
Discharged 9.07999992 kg/d against a permitted limit of 7.264 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
November 30, 2024
Nitrogen, ammonia total [as N]
0% over limit
Discharged 4.7 mg/L against a permitted limit of 6 mg/L (DAILY AV)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 3.81359997 kg/d against a permitted limit of 7.264 kg/d (DAILY AV)
DMR, Limited - Overdue
E. coli
355% over limit
Discharged 1817.4 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Overdue
E. coli
355% over limit
Discharged 1817.4 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.16 MGD against a permitted limit of 0.32 MGD (DAILY AV)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 87.98519926 kg/d against a permitted limit of 108.95999908 kg/d (DAILY AV)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
29% over limit
Discharged 46.76199961 kg/d against a permitted limit of 36.32 kg/d (DAILY AV)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
29% over limit
Discharged 46.76199961 kg/d against a permitted limit of 36.32 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
26% over limit
Discharged 113.3 mg/L against a permitted limit of 90 mg/L (DAILY AV)
DMR, Limited - Overdue
Solids, total suspended
26% over limit
Discharged 113.3 mg/L against a permitted limit of 90 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 8.5 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Overdue
E. coli
135% over limit
Discharged 295.5 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Overdue
E. coli
135% over limit
Discharged 295.5 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
28% over limit
Discharged 4.3 mg/L against a permitted limit of 6 mg/L (MO MIN)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
28% over limit
Discharged 4.3 mg/L against a permitted limit of 6 mg/L (MO MIN)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 8.5 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 7.8 mg/L against a permitted limit of 15 mg/L (SINGGRAB)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 74.3 mg/L against a permitted limit of 100 mg/L (SINGGRAB)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.4 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
BOD, carbonaceous [5 day, 20 C]
78% over limit
Discharged 53.3 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
78% over limit
Discharged 53.3 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
October 31, 2024
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.12 MGD against a permitted limit of 0.32 MGD (DAILY AV)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 3.8 mg/L against a permitted limit of 6 mg/L (DAILY AV)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 2.54239998 kg/d against a permitted limit of 7.264 kg/d (DAILY AV)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 27.01299977 kg/d against a permitted limit of 36.32 kg/d (DAILY AV)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 6.9 mg/L against a permitted limit of 15 mg/L (SINGGRAB)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
50% over limit
Discharged 45 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
50% over limit
Discharged 45 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.4 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 8.1 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 90 mg/L against a permitted limit of 90 mg/L (DAILY AV)
DMR, Limited - Overdue
E. coli
222% over limit
Discharged 1283 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Overdue
E. coli
222% over limit
Discharged 1283 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 8.1 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 57.29479952 kg/d against a permitted limit of 108.95999908 kg/d (DAILY AV)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 7.2 mg/L against a permitted limit of 6 mg/L (MO MIN)
DMR, Limited - Overdue
E. coli
240% over limit
Discharged 428.3 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Overdue
E. coli
240% over limit
Discharged 428.3 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 64.2 mg/L against a permitted limit of 100 mg/L (SINGGRAB)
DMR, Limited - Overdue
September 30, 2024
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 45 mg/L against a permitted limit of 100 mg/L (SINGGRAB)
DMR, Limited - Overdue
E. coli
0% over limit
Discharged 365.1 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.43 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
E. coli
0% over limit
Discharged 107.2 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 4.61 mg/L against a permitted limit of 15 mg/L (SINGGRAB)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 64.74039946 kg/d against a permitted limit of 108.95999908 kg/d (DAILY AV)
DMR, Limited - Overdue
pH
0% over limit
Discharged 8.34 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Overdue
pH
0% over limit
Discharged 8.67 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
20% over limit
Discharged 4.82 mg/L against a permitted limit of 6 mg/L (MO MIN)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
20% over limit
Discharged 4.82 mg/L against a permitted limit of 6 mg/L (MO MIN)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
22% over limit
Discharged 36.7 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
22% over limit
Discharged 36.7 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
27% over limit
Discharged 114.3 mg/L against a permitted limit of 90 mg/L (DAILY AV)
DMR, Limited - Overdue
Solids, total suspended
27% over limit
Discharged 114.3 mg/L against a permitted limit of 90 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.17 MGD against a permitted limit of 0.32 MGD (DAILY AV)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 2.32901998 kg/d against a permitted limit of 7.264 kg/d (DAILY AV)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 18.65939984 kg/d against a permitted limit of 36.32 kg/d (DAILY AV)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 3.23 mg/L against a permitted limit of 6 mg/L (DAILY AV)
DMR, Limited - Overdue
August 31, 2024
Oxygen, dissolved [DO]
12% over limit
Discharged 5.28 mg/L against a permitted limit of 6 mg/L (MO MIN)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)