Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
1129538 |
06/30/2024 |
CAT1 |
Settleable Solids Monthly Average (Mean) limit is 0.1 mg/L and reported value was 0.15 mg/L at M-003. |
as stated for the 06/24/24 violation staff adjusted operations to bring plant into compliance |
Violation |
U |
eSMR |
1129539 |
06/24/2024 |
CAT1 |
Settleable Solids Maximum Daily (MDEL) limit is 0.2 mg/L and reported value was 0.3 mg/L at M-003. |
staff adjusted mixed liquor to improve settling and cleaned contact basins and clairifier |
Violation |
U |
eSMR |
1125041 |
03/02/2024 |
LREP |
Annual SMR ( MONNPDES ) report for 2023 (2673454) was due on 01-MAR-24 |
|
Violation |
B |
Report |
1123391 |
11/14/2023 |
OEV |
Total Coliform Maximum Daily (MDEL) limit is 230 MPN/100 mL and reported value was 350 MPN/100 mL at M-003. |
staff adjusted disinfection |
Violation |
U |
eSMR |
1123390 |
10/10/2023 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 032 mg/L and reported value was 033 mg/L at M-003. |
the city continues working with consultant engineers on a treatment plant upgrade, which will include denitrification. |
Violation |
U |
eSMR |
1120974 |
09/12/2023 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 32 mg/L and reported value was 38 mg/L at M-003. |
The City of Fortuna is working on upgrading its WWTP to better remove nitrate in the effluent. |
Violation |
U |
eSMR |
1120975 |
08/31/2023 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 32 mg/L and reported value was 44 mg/L at M-003. |
The City of Fortuna is working on upgrading its WWTP to better remove nitrate in the effluent. |
Violation |
U |
eSMR |
1120977 |
07/31/2023 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 32 mg/L and reported value was 43 mg/L at M-003. |
The City of Fortuna is working on upgrading its WWTP to better remove nitrate in the effluent. |
Violation |
U |
eSMR |
1120973 |
07/31/2023 |
CAT1 |
Settleable Solids Monthly Average limit is 0.1 ml/L and reported value was 0.2 ml/L at M-003. |
Adjusted aeration rates in the MLSS to fine-tune biological nitrification-denitrification. |
Violation |
U |
eSMR |
1120976 |
07/10/2023 |
CAT1 |
Settleable Solids Daily Maximum limit is 0.2 ml/L and reported value was 0.4 ml/L at M-003. |
Adjusted aeration rates in the MLSS to fine-tune biological nitrification-denitrification. |
Violation |
U |
eSMR |
1118688 |
06/30/2023 |
CAT1 |
Settleable Solids Monthly Average limit is 0.1 ml/L and reported value was 0.225 ml/L at M-003. |
Staff altered solids-wasting schedules and fine-tuned the plant solids-balance to enhance proper settling in the secondary clarifiers. Staff also manipulated the number of secondary clarifiers in operation. |
Violation |
U |
eSMR |
1118687 |
06/06/2023 |
CAT1 |
Settleable Solids Maximum Daily (MDEL) limit is 0.2 ml/L and reported value was 0.5 ml/L at M-003. |
Staff continued operations to correct the plant solids balance and enhance treatment conditions to enable better settling in the secondary clarifiers. |
Violation |
U |
eSMR |
1118686 |
05/30/2023 |
CAT1 |
Settleable Solids Daily Maximum limit is 0.2 ml/L and reported value was 0.5 ml/L at M-003. |
Plant staff added a second secondary clarifier online and decreased sludge-wasting. This allowed for increased settling prior to the chlorine contact chambers. The reduction of sludge-wasting allowed for solids build-up and recuperation in the MLSS. |
Violation |
U |
eSMR |
1112480 |
11/29/2022 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 32 mg/L and reported value was 37 mg/L at M-003. |
Excessive nitrate levels will remain a constant threat in the effluent until the City upgrades the treatment plant to add denitrification infrastructure. |
Violation |
B |
eSMR |
1109356 |
07/11/2022 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 32 mg/L and reported value was 33 mg/L at M-003. |
Excessive nitrate levels will remain a constant threat until the City upgrades the treatment plant to add denitrification. |
Violation |
B |
eSMR |
1106085 |
06/16/2022 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 32 mg/L and reported value was 35 mg/L at M-003. |
The plant is in the design phase of upgrading its treatment process for denitrification. This will result in the future removal of nitrate in the effluent. |
Violation |
B |
eSMR |
1106086 |
05/31/2022 |
OEV |
Total Coliform 30-Day Median limit is 23 MPN/100 mL and reported value was 49 MPN/100 mL at M-003. |
Staff increased the chlorine dosage feed-rate to improve disinfection. |
Violation |
B |
eSMR |
1106084 |
05/19/2022 |
CAT2 |
Dichlorobromomethane Monthly Average limit is 0.56 ug/L and reported value was 0.92 ug/L at M-003. |
Staff will continue to closely monitor chemical feed-rates and treatment efficiency to inhibit the formation of disinfection byproducts in the effluent. |
Violation |
B |
eSMR |
1102927 |
03/03/2022 |
DMON |
Due to an over-depletion of DO in the lab dilution water, City lab staff invalidated the effluent BOD result for the first week of March. |
City lab staff corrected the issue with the lab dilution water. |
Violation |
B |
eSMR |
1102926 |
03/03/2022 |
DMON |
Due to an over-depletion of DO in the lab dilution water, City lab staff invalidated the influent BOD result for the first week of March. |
City lab staff corrected the issue with the lab dilution water. |
Violation |
B |
eSMR |
1095607 |
07/13/2021 |
CAT1 |
Ammonia, Total (as N) Monthly Average limit is 9.4 mg/L and reported value was 9.7 mg/L at M-003. |
The City of Fortuna is upgrading its WWTP to better control treatment for nutrient removal, such as ammonia. This will occur in the next few years. |
Violation |
B |
eSMR |
1092053 |
04/30/2021 |
OEV |
Total Coliform Monthly Median limit is 23 MPN/100 mL and reported value was 214.5 MPN/100 mL at M-001. |
Staff will adjust chemical feed to meet any possible effects of future plant process changes. |
Violation |
B |
eSMR |
1092052 |
04/26/2021 |
OEV |
Total Coliform Single Sample Maximum limit is 240 MPN/100 mL and reported value was 350 MPN/100 mL at M-001. |
Staff will adjust chemical feed to meet any possible effects of future plant process changes. |
Violation |
B |
eSMR |
1092051 |
04/20/2021 |
OEV |
Total Coliform Single Sample Maximum limit is 240 MPN/100 mL and reported value was 350 MPN/100 mL at M-001. |
Staff will adjust chemical feed to meet any possible effects of future plant process changes. |
Violation |
B |
eSMR |
1092054 |
04/13/2021 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 32 mg/L and reported value was 37 mg/L at M-001. |
The plant is under a Time Schedule Order to upgrade its ability to remove ammonia and nitrate. This will occur before the end of 2024. |
Violation |
B |
eSMR |
1088517 |
02/19/2021 |
CAT2 |
Chlorine, Total Residual Maximum Daily (MDEL) limit is 0.02 mg/L and reported value was 0.03 mg/L at M-001. |
Staff changed out the SO2 ton tank as soon as their shift began. In the future, a preemptive SO2 ton tank changeout will occur before it can empty after hours and switch over to the 150# cylinders under such high flow conditions. |
Violation |
B |
eSMR |
1083797 |
12/08/2020 |
OEV |
Total Coliform Maximum Daily (MDEL) limit is 240 MPN/100 mL and reported value was 350 MPN/100 mL at M-003. |
Staff increased chlorine feed until they resolved the turbid effluent situation that caused the high coliform count. |
Violation |
B |
eSMR |
1083796 |
10/13/2020 |
CAT1 |
Ammonia, Total (as N) Monthly Average limit is 9.4 mg/L and reported value was 19 mg/L at M-003. |
Staff took better control of the biological nitrification process to prevent any further ammonia violations this quarter. |
Violation |
B |
eSMR |
1080183 |
09/09/2020 |
CAT1 |
Ammonia, Total (as N) Monthly Average limit is 9.4 mg/L and reported value was 15 mg/L at M-003. |
Probable causes include lack of adequate nitrification in the treatment process or excessive chloramination. More attention to the nitrification process and ammonia feed will occur in the future. |
Violation |
U |
eSMR |
1080184 |
08/20/2020 |
DMON |
The required weekly influent BOD test was disqualified due to a potential lab error. There was no depletion of oxygen in the BOD bottles. |
Staff will pay closer attention to lab activities to ensure no possible errors in the future. |
Violation |
U |
eSMR |
1076855 |
06/09/2020 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 32 mg/L and reported value was 36 mg/L at M-003. |
The plant will be upgraded in the near future to include de-nitrification infrastructure to remove nitrate. |
Violation |
U |
eSMR |
1076854 |
05/15/2020 |
CAT2 |
Chlorine, Total Residual Maximum Daily (MDEL) limit is 0.02 mg/L and reported value was 0.04 mg/L at M-003. |
Staff responded and resolved the excessive chlorination and improper de-chlorination. |
Violation |
U |
eSMR |
1076856 |
05/14/2020 |
CAT2 |
Chlorine, Total Residual Maximum Daily (MDEL) limit is 0.02 mg/L and reported value was 0.04 mg/L at M-003. |
Staff responded and resolved the excessive chlorination and improper de-chlorination. |
Violation |
U |
eSMR |
1072378 |
01/31/2020 |
OEV |
Total Coliform 30-Day Median limit is 23 MPN/100 mL and reported value was 90.5 MPN/100 mL at M-001. |
Staff will increase the chlorine dose during wet weather events in the future. |
Violation |
U |
eSMR |
1072379 |
01/21/2020 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 1600 MPN/100 mL at M-001. |
Staff will raise the chlorine dose in the future when flows increase. |
Violation |
U |
eSMR |
1069243 |
11/20/2019 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 32 mg/L and reported value was 40 mg/L at M-001. |
The plant will denitrify in the future. |
Violation |
U |
eSMR |
1069242 |
10/14/2019 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 32 mg/L and reported value was 35 mg/L at M-001. |
The plant will denitrify in the future. |
Violation |
U |
eSMR |
1065343 |
07/31/2019 |
DMON |
The required monthly hardness sample was not taken on the Eel River receiving water location during the month of July. |
Greater attention to the sampling schedule will be heeded in the future to ensure no further omissions. |
Violation |
U |
eSMR |
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
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