CITY OF SANTA ROSA WWTP
NPDES ID: TX0075451
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: 7 effluent violations.
Violations
May 31, 2026
BOD, 5-day, 20 deg. C
90% over limit
Discharged 38 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
65% over limit
Discharged 33 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
April 30, 2026
Solids, total suspended
100% over limit
Discharged 40 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, total suspended
145% over limit
Discharged 49 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
January 31, 2026
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.089 MGD against a permitted limit of 0.39 MGD (DAILY AV)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 5.4 mg/L against a permitted limit of 2 mg/L (MO MIN)
DMR, Limited - Overdue
E. coli
0% over limit
Discharged 1 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 47 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 13 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.173 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
E. coli
0% over limit
Discharged 1 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 2.7 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 1 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 2.72399998 kg/d against a permitted limit of 29.51 kg/d (DAILY AV)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 6 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 10.89599991 kg/d against a permitted limit of 29.51 kg/d (DAILY AV)
DMR, Limited - Overdue
pH
0% over limit
Discharged 8.3 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.5 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Overdue
Solids, total suspended
30% over limit
Discharged 26 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Overdue
Solids, total suspended
30% over limit
Discharged 26 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
December 31, 2025
E. coli
415% over limit
Discharged 648.8 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
63% over limit
Discharged 648.8 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
Solids, total suspended
100% over limit
Discharged 40 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
November 30, 2025
E. coli
Limit violation
Discharged 2419.6 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
Limit violation
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
Solids, total suspended
15% over limit
Discharged 23 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
October 31, 2025
Solids, total suspended
85% over limit
Discharged 37 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
6% over limit
Discharged 31.32599974 kg/d against a permitted limit of 29.51 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
65% over limit
Discharged 0.71 mg/L against a permitted limit of 2 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Solids, total suspended
5% over limit
Discharged 68 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
95% over limit
Discharged 39 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
55% over limit
Discharged 101 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
September 30, 2025
pH
0% over limit
Discharged 8.5 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 1.6 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 8.17199993 kg/d against a permitted limit of 29.51 kg/d (DAILY AV)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.298 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 11 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 22.69999981 kg/d against a permitted limit of 29.51 kg/d (DAILY AV)
DMR, Limited - Overdue
E. coli
0% over limit
Discharged 1 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 47 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Overdue
E. coli
0% over limit
Discharged 1 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 3 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 9 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.215 MGD against a permitted limit of 0.39 MGD (DAILY AV)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 3.6 mg/L against a permitted limit of 2 mg/L (MO MIN)
DMR, Limited - Overdue
Solids, total suspended
35% over limit
Discharged 27 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Overdue
Solids, total suspended
35% over limit
Discharged 27 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 8 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Overdue
August 31, 2025
BOD, 5-day, 20 deg. C
80% over limit
Discharged 53.11799955 kg/d against a permitted limit of 29.51 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
2% over limit
Discharged 29.96399975 kg/d against a permitted limit of 29.51 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
96% over limit
Discharged 0.08 mg/L against a permitted limit of 2 mg/L (MO MIN)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
65% over limit
Discharged 33 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
Limit violation
Discharged 2419.6 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
65% over limit
Discharged 33 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
Limit violation
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
July 31, 2025
E. coli
Limit violation
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
77% over limit
Discharged 0.46 mg/L against a permitted limit of 2 mg/L (MO MIN)
DMR, Limited - Numeric Violation
E. coli
Limit violation
Discharged 2419.6 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
June 30, 2025
E. coli
Limit violation
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
E. coli
Limit violation
Discharged 2419.6 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
May 31, 2025
Solids, total suspended
65% over limit
Discharged 33 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
9% over limit
Discharged 32.23399973 kg/d against a permitted limit of 29.51 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
9% over limit
Discharged 71 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
April 30, 2025
pH
0% over limit
Discharged 9.1 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
Solids, total suspended
100% over limit
Discharged 40 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
78% over limit
Discharged 52.66399956 kg/d against a permitted limit of 29.51 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
March 31, 2025
Flow, in conduit or thru treatment plant
94% over limit
Discharged 0.757 MGD against a permitted limit of 0.39 MGD (DAILY AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
14% over limit
Discharged 33.59599972 kg/d against a permitted limit of 29.51 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
29% over limit
Discharged 84 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
Solids, total suspended
245% over limit
Discharged 69 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
189% over limit
Discharged 85.35199928 kg/d against a permitted limit of 29.51 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
February 28, 2025
Solids, total suspended
195% over limit
Discharged 59 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
January 31, 2025
Flow, in conduit or thru treatment plant
77% over limit
Discharged 0.689 MGD against a permitted limit of 0.39 MGD (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
3% over limit
Discharged 67 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
Solids, total suspended
155% over limit
Discharged 51 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
December 31, 2024
Solids, total suspended
75% over limit
Discharged 35 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
Limit violation
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
E. coli
Limit violation
Discharged 2419.6 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
November 30, 2024
BOD, 5-day, 20 deg. C
0% over limit
Discharged 2 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 17 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.291 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.164 MGD against a permitted limit of 0.39 MGD (DAILY AV)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 13 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 2 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Overdue
E. coli
0% over limit
Discharged 1 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 2.4 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 8.17199993 kg/d against a permitted limit of 29.51 kg/d (DAILY AV)
DMR, Limited - Overdue
pH
0% over limit
Discharged 8.7 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 1 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.5 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Overdue
E. coli
0% over limit
Discharged 1 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0.90799999 kg/d against a permitted limit of 29.51 kg/d (DAILY AV)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 2.7 mg/L against a permitted limit of 2 mg/L (MO MIN)
DMR, Limited - Overdue
October 31, 2024
BOD, 5-day, 20 deg. C
0% over limit
Discharged 38 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.228 MGD against a permitted limit of 0.39 MGD (DAILY AV)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 17 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.498 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 11.8039999 kg/d against a permitted limit of 29.51 kg/d (DAILY AV)
DMR, Limited - Overdue
pH
0% over limit
Discharged 8.8 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 1 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 8.62599993 kg/d against a permitted limit of 29.51 kg/d (DAILY AV)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 39 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 2.9 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Overdue
E. coli
0% over limit
Discharged 1 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Overdue
pH
0% over limit
Discharged 9.9 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Overdue
Solids, total suspended
10% over limit
Discharged 22 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Overdue
Solids, total suspended
10% over limit
Discharged 22 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
0% over limit
Discharged 1 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 2 mg/L against a permitted limit of 2 mg/L (MO MIN)
DMR, Limited - Overdue
September 30, 2024
BOD, 5-day, 20 deg. C
0% over limit
Discharged 7 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 18 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 10.44199991 kg/d against a permitted limit of 29.51 kg/d (DAILY AV)
DMR, Limited - Overdue
E. coli
0% over limit
Discharged 1 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 14 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Overdue
E. coli
0% over limit
Discharged 1 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Overdue
pH
0% over limit
Discharged 8.1 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 1 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.0306 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 19 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.213 MGD against a permitted limit of 0.39 MGD (DAILY AV)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 3.1 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Overdue
pH
0% over limit
Discharged 8.7 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 5.44799995 kg/d against a permitted limit of 29.51 kg/d (DAILY AV)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 4.2 mg/L against a permitted limit of 2 mg/L (MO MIN)
DMR, Limited - Overdue
August 31, 2024
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.239 MGD against a permitted limit of 0.39 MGD (DAILY AV)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 3.1 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 2.72399998 kg/d against a permitted limit of 29.51 kg/d (DAILY AV)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 1 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Overdue
pH
0% over limit
Discharged 6.1 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 5 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Overdue
E. coli
0% over limit
Discharged 6.3 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 4.4 mg/L against a permitted limit of 2 mg/L (MO MIN)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 27 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Overdue
E. coli
0% over limit
Discharged 6.3 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 17 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Overdue
pH
0% over limit
Discharged 8.3 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.363 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 14.52799988 kg/d against a permitted limit of 29.51 kg/d (DAILY AV)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 3 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)