| Violation ID |
Occurrence Date |
Violation Type |
Violation Description(-) |
Violation Status |
Priority |
Source |
Facility Name |
Violated Reg. Meas. ID |
Violated Reg. Meas. Order No. |
Linked to Enf. |
| 1154131 |
04/01/2026 |
CAT1 |
Aluminum, Total Recoverable Weekly Average limit is 370 ug/L and reported value was 1070 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
N |
| 1154130 |
04/01/2026 |
CAT2 |
Copper, Total Recoverable Weekly Average limit is 15 ug/L and reported value was 17.7 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
N |
| 1154129 |
04/30/2026 |
CAT2 |
Copper, Total Recoverable Monthly Average limit is 6.7 ug/L and reported value was 17.7 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
N |
| 1154128 |
04/30/2026 |
Deficient Monitoring |
Total Chlorine Residual is required to be monitored continuously by meter. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
N |
| 1154127 |
04/30/2026 |
CAT1 |
Aluminum, Total Recoverable Monthly Average limit is 290 ug/L and reported value was 1070 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
N |
| 1153031 |
03/04/2026 |
CAT1 |
Aluminum, Total Recoverable Weekly Average limit is 370 ug/L and reported value was 800 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
N |
| 1153030 |
03/31/2026 |
CAT1 |
Aluminum, Total Recoverable Monthly Average limit is 290 ug/L and reported value was 800 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
N |
| 1153029 |
03/31/2026 |
Deficient Monitoring |
Total Chlorine Residual is required to be monitored continuously by meter. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
N |
| 1151955 |
02/28/2026 |
Deficient Monitoring |
Total Chlorine Residual is required to be monitored continuously by meter. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
N |
| 1151954 |
02/04/2026 |
CAT1 |
Aluminum, Total Recoverable Weekly Average limit is 370 ug/L and reported value was 1100 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
N |
| 1151953 |
02/28/2026 |
CAT1 |
Aluminum, Total Recoverable Monthly Average limit is 290 ug/L and reported value was 1100 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
N |
| 1151684 |
12/31/2025 |
Deficient Monitoring |
Total Chlorine Residual is required to be monitored continuously by meter. Grab samples for Total Clorine Residual 3 times daily, using a DPD Colorimeter, is not acceptable. |
Violation |
N |
Report |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1151352 |
01/26/2026 |
Deficient Monitoring |
Lab added MOPS buffer and adjusted the sample to pH of 7.0 prior to acute toxicity testing. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
N |
| 1151320 |
01/31/2026 |
CAT1 |
BOD5 @ 20 Deg. C, Percent Removal Percent Removal limit is 85 % and reported value was 83 % at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
N |
| 1151319 |
01/31/2026 |
CAT2 |
Copper, Total Recoverable Monthly Average limit is 6.7 ug/L and reported value was 7.93 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
N |
| 1151318 |
01/31/2026 |
CAT1 |
Aluminum, Total Recoverable Monthly Average limit is 290 ug/L and reported value was 333 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
N |
| 1150994 |
11/24/2025 |
Deficient Monitoring |
Lab added MOPS buffer and adjusted the sample to pH of 7.0 prior to acute toxicity testing. Permit states that no pH adjustment may be made unless approved by the Executive Officer. Staff could not find any documentation stating that Executive Officer approved pH adjustment. Additionally, EPA-821-R-02-012 does not allow the use of a buffer. |
Violation |
N |
Report |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1150993 |
11/30/2025 |
Deficient Monitoring |
Total Chlorine Residual is required to be monitored continuously by meter. Grab samples for Total Clorine Residual 3 times daily, using a DPD Colorimeter, is not acceptable. |
Violation |
N |
Report |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1150304 |
12/03/2025 |
CAT1 |
Aluminum, Total Recoverable Weekly Average limit is 370 ug/L and reported value was 974 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1150303 |
12/31/2025 |
CAT1 |
Aluminum, Total Recoverable Monthly Average limit is 290 ug/L and reported value was 974 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1150302 |
12/31/2025 |
CAT1 |
Total Suspended Solids (TSS), Percent Removal Percent Removal limit is 85 % and reported value was 66 % at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1150298 |
12/03/2025 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 45 mg/L and reported value was 76.7 mg/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1149882 |
11/30/2025 |
CAT1 |
Aluminum, Total Recoverable Monthly Average limit is 290 ug/L and reported value was 1030 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1149881 |
11/05/2025 |
CAT1 |
Aluminum, Total Recoverable Weekly Average limit is 370 ug/L and reported value was 1030 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1149880 |
11/30/2025 |
CAT1 |
BOD5 @ 20 Deg. C, Percent Removal Monthly Average limit is 85 % and reported value was 75 % at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1149878 |
11/30/2025 |
CAT1 |
Total Suspended Solids (TSS), Percent Removal Monthly Average limit is 85 % and reported value was 69 % at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1149821 |
07/21/2025 |
ATOX |
Acute Toxicity-Fathead Minnow-survival 3-Sample Median limit is 90.0 % effect and reported value was 82.5 % effect at EFF-001. |
Violation |
N |
Report |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1149095 |
10/22/2025 |
CAT1 |
Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Weekly Average limit is 45 mg/L and reported value was 67 mg/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1149094 |
10/31/2025 |
CAT2 |
Copper, Total Recoverable Monthly Average limit is 6.7 ug/L and reported value was 6.96 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1149093 |
10/31/2025 |
CAT1 |
Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Monthly Average limit is 30 mg/L and reported value was 40 mg/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1149092 |
10/01/2025 |
CAT1 |
Aluminum, Total Recoverable Weekly Average limit is 370 ug/L and reported value was 869 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1149090 |
10/31/2025 |
CAT1 |
Aluminum, Total Recoverable Monthly Average limit is 290 ug/L and reported value was 869 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1148022 |
09/24/2025 |
OEV |
Total Coliform Weekly Average limit is 23 MPN/100 mL and reported value was 49 MPN/100 mL at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1148021 |
09/06/2025 |
CAT1 |
Aluminum, Total Recoverable Weekly Average limit is 370 ug/L and reported value was 723 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1148020 |
09/30/2025 |
CAT1 |
Aluminum, Total Recoverable Monthly Average limit is 290 ug/L and reported value was 723 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1147130 |
08/31/2025 |
CAT1 |
Aluminum, Total Recoverable Monthly Average limit is 290 ug/L and reported value was 954 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1147129 |
08/09/2025 |
CAT1 |
Aluminum, Total Recoverable Weekly Average limit is 370.0 ug/L and reported value was 954.0 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1145775 |
07/31/2025 |
CAT1 |
Aluminum, Total Recoverable Monthly Average limit is 290 ug/L and reported value was 1270 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1145774 |
07/09/2025 |
CAT1 |
Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Weekly Average limit is 45 mg/L and reported value was 53 mg/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1145772 |
07/02/2025 |
CAT1 |
Aluminum, Total Recoverable Weekly Average limit is 370 ug/L and reported value was 1270 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1145770 |
07/31/2025 |
CAT2 |
Copper, Total Recoverable Monthly Average limit is 6.7 ug/L and reported value was 7.35 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1145769 |
07/09/2025 |
OEV |
Total Coliform 7-Day Median limit is 23 MPN/100 mL and reported value was 33 MPN/100 mL at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1145768 |
07/02/2025 |
OEV |
Total Coliform 7-Day Median limit is 23.0 MPN/100 mL and reported value was 1600.0 MPN/100 mL at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1145765 |
07/31/2025 |
CAT1 |
Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Monthly Average limit is 30.0 mg/L and reported value was 34.0 mg/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1144507 |
06/30/2025 |
CAT1 |
Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Monthly Average limit is 30.0 mg/L and reported value was 43.8 mg/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1144506 |
06/28/2025 |
CAT1 |
Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Weekly Average limit is 45 mg/L and reported value was 83 mg/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1144505 |
06/07/2025 |
CAT1 |
Aluminum, Total Recoverable Weekly Average limit is 370.0 ug/L and reported value was 929.0 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1144504 |
06/30/2025 |
CAT1 |
Aluminum, Total Recoverable Monthly Average limit is 290 ug/L and reported value was 929 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1143917 |
05/31/2025 |
CAT1 |
Aluminum, Total Recoverable Monthly Average limit is 290 ug/L and reported value was 557 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
| 1143916 |
05/31/2025 |
CAT2 |
Copper, Total Recoverable Monthly Average limit is 6.7 ug/L and reported value was 6.95 ug/L at EFF-001. |
Violation |
N |
eSMR |
Alturas Municipal WWTP |
428906 |
R5-2020-0004 |
Y |
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