ALTUS SE WWTP
NPDES ID: OK0028037
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 1 effluent violation, 1 compliance schedule violation.
Violations
April 30, 2026
E. coli
19% over limit
Discharged 2420 MPN/100mL against a permitted limit of 2030 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
E. coli
19% over limit
Discharged 2420 MPN/100mL against a permitted limit of 2030 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
E. coli
19% over limit
Discharged 2420 MPN/100mL against a permitted limit of 2030 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
E. coli
19% over limit
Discharged 2420 MPN/100mL against a permitted limit of 2030 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
E. coli
19% over limit
Discharged 2420 MPN/100mL against a permitted limit of 2030 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0.099 mg/L (INST MAX)
DMR, Limited - Overdue
Pass/Fail Survival 21 Day Chronic Daphnia Magna
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (MINIMUM)
DMR, Monitor Only - Overdue
Nitrogen, nitrate total [as N]
0% over limit
Discharged 13.8 mg/L against a permitted limit of 22.59 mg/L (DAILY MX)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 3.7 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Overdue
Sulfate, total [as SO4]
0% over limit
Discharged 339 mg/L against a permitted limit of 1520 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.34 mg/L against a permitted limit of 5.3 mg/L (WKLY AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 2.17919998 kg/d against a permitted limit of 46.39879961 kg/d (MO AVG)
DMR, Limited - Overdue
LOEC Lethal Survival Static Renewal 21 Day Chronic Daphnia magna
0% over limit
Discharged 100 % against a permitted limit of 0 % (MINIMUM)
DMR, Monitor Only - Overdue
Pass/Fail Reproduction 21 Day Chronic Daphnia Magna
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (MINIMUM)
DMR, Monitor Only - Overdue
Sulfate, total [as SO4]
0% over limit
Discharged 450 mg/L against a permitted limit of 1734 mg/L (DAILY MX)
DMR, Limited - Overdue
% Coefficient Of Variation 21 Day Chronic Daphnia Magna
0% over limit
Discharged 16.93 % against a permitted limit of 0 % (MINIMUM)
DMR, Monitor Only - Overdue
Selenium, total [as Se]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.00492 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 11.3 mg/L against a permitted limit of 22.5 mg/L (WKLY AVG)
DMR, Limited - Overdue
E. coli
19% over limit
Discharged 2420 MPN/100mL against a permitted limit of 2030 MPN/100mL (DAILY MX)
DMR, Limited - Overdue
E. coli
19% over limit
Discharged 2420 MPN/100mL against a permitted limit of 2030 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total dissolved- 180 deg. C
0% over limit
Discharged 2715 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, nitrate total [as N]
0% over limit
Discharged 113.59533905 kg/d against a permitted limit of 163.66699862 kg/d (MO AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.3 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.244 mg/L against a permitted limit of 3.5 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, total dissolved- 180 deg. C
0% over limit
Discharged 2360.1 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 2.074 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Solids, total dissolved- 180 deg. C
0% over limit
Discharged 2008 mg/L against a permitted limit of 0 mg/L (DAILY MN)
DMR, Monitor Only - Overdue
Sulfate, total [as SO4]
0% over limit
Discharged 3374.19153165 kg/d against a permitted limit of 20144.43383074 kg/d (MO AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 32.68799973 kg/d against a permitted limit of 132.52259889 kg/d (MO AVG)
DMR, Limited - Overdue
E. coli
0% over limit
Discharged 64.26 MPN/100mL against a permitted limit of 630 MPN/100mL (GEO MEAN)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 6.19 mg/L against a permitted limit of 2 mg/L (INST MIN)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 52.11919956 kg/d against a permitted limit of 198.80659833 kg/d (MO AVG)
DMR, Limited - Overdue
LOEC Sub-Lethal Reproduction Static Renewal 21 Day Chronic Daphnia magna
0% over limit
Discharged 100 % against a permitted limit of 0 % (MINIMUM)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 5.8 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 8.11 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
Nitrogen, nitrate total [as N]
0% over limit
Discharged 12 mg/L against a permitted limit of 12.35 mg/L (MO AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 5.24 mg/L against a permitted limit of 15 mg/L (WKLY AVG)
DMR, Limited - Overdue
Selenium, total [as Se]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.06356 kg/d (MO AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 3.198 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
% Mortality 21 Day Chronic Daphnia Magna
0% over limit
Discharged 0 % against a permitted limit of 0 % (MINIMUM)
DMR, Monitor Only - Overdue
Selenium, total [as Se]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.00696 mg/L (DAILY MX)
DMR, Limited - Overdue
Whole Effluent Toxicity [WET] - D. magna
0% over limit
Discharged 100 % against a permitted limit of 100 % (MINIMUM)
DMR, Limited - Overdue
September 30, 2025
E. coli
496% over limit
Discharged 2420 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Overdue
E. coli
496% over limit
Discharged 2420 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Sulfate, total [as SO4]
0% over limit
Discharged 5174.91895652 kg/d against a permitted limit of 20144.43383074 kg/d (MO AVG)
DMR, Limited - Overdue
Nitrogen, nitrate total [as N]
0% over limit
Discharged 10.3 mg/L against a permitted limit of 12.35 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, total dissolved- 180 deg. C
0% over limit
Discharged 1900 mg/L against a permitted limit of 0 mg/L (DAILY MN)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 7.8 mg/L against a permitted limit of 22.5 mg/L (WKLY AVG)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0.099 mg/L (INST MAX)
DMR, Limited - Overdue
Nitrogen, nitrate total [as N]
0% over limit
Discharged 10.7 mg/L against a permitted limit of 22.59 mg/L (DAILY MX)
DMR, Limited - Overdue
% Mortality 21 Day Chronic Daphnia Magna
0% over limit
Discharged 0 % against a permitted limit of 0 % (MINIMUM)
DMR, Monitor Only - Overdue
Solids, total dissolved- 180 deg. C
0% over limit
Discharged 2179 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 52.39159956 kg/d against a permitted limit of 198.80659833 kg/d (MO AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 48.30559959 kg/d against a permitted limit of 132.52259889 kg/d (MO AVG)
DMR, Limited - Overdue
E. coli
49% over limit
Discharged 187.9 MPN/100mL against a permitted limit of 126 MPN/100mL (GEO MEAN)
DMR, Limited - Overdue
E. coli
49% over limit
Discharged 187.9 MPN/100mL against a permitted limit of 126 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Nitrogen, nitrate total [as N]
0% over limit
Discharged 102.63577914 kg/d against a permitted limit of 163.66699862 kg/d (MO AVG)
DMR, Limited - Overdue
% Coefficient Of Variation 21 Day Chronic Daphnia Magna
0% over limit
Discharged 20.81 % against a permitted limit of 0 % (MINIMUM)
DMR, Monitor Only - Overdue
Selenium, total [as Se]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.06356 kg/d (MO AVG)
DMR, Limited - Overdue
Whole Effluent Toxicity [WET] - D. magna
0% over limit
Discharged 100 % against a permitted limit of 100 % (MINIMUM)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 5.5 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 4.975 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 5.56 mg/L against a permitted limit of 2 mg/L (INST MIN)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 3.386 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.219 mg/L against a permitted limit of 3.5 mg/L (MO AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 5.97 mg/L against a permitted limit of 15 mg/L (WKLY AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.265 mg/L against a permitted limit of 5.3 mg/L (WKLY AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 2.353 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
LOEC Sub-Lethal Reproduction Static Renewal 21 Day Chronic Daphnia magna
0% over limit
Discharged 100 % against a permitted limit of 0 % (MINIMUM)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 2.13379998 kg/d against a permitted limit of 46.39879961 kg/d (MO AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.91 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
Sulfate, total [as SO4]
0% over limit
Discharged 507.5 mg/L against a permitted limit of 1520 mg/L (MO AVG)
DMR, Limited - Overdue
LOEC Lethal Survival Static Renewal 21 Day Chronic Daphnia magna
0% over limit
Discharged 100 % against a permitted limit of 0 % (MINIMUM)
DMR, Monitor Only - Overdue
Pass/Fail Survival 21 Day Chronic Daphnia Magna
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (MINIMUM)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 7.4 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Overdue
Selenium, total [as Se]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.00696 mg/L (DAILY MX)
DMR, Limited - Overdue
Sulfate, total [as SO4]
0% over limit
Discharged 525 mg/L against a permitted limit of 1734 mg/L (DAILY MX)
DMR, Limited - Overdue
Selenium, total [as Se]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.00492 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, total dissolved- 180 deg. C
0% over limit
Discharged 2049 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Pass/Fail Reproduction 21 Day Chronic Daphnia Magna
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (MINIMUM)
DMR, Monitor Only - Overdue
August 31, 2025
Solids, total suspended
0% over limit
Discharged 4.9 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 4.169 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.287 mg/L against a permitted limit of 5.3 mg/L (WKLY AVG)
DMR, Limited - Overdue
Nitrogen, nitrate total [as N]
0% over limit
Discharged 10 mg/L against a permitted limit of 22.59 mg/L (DAILY MX)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.99 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 34.68559971 kg/d against a permitted limit of 132.52259889 kg/d (MO AVG)
DMR, Limited - Overdue
Solids, total dissolved- 180 deg. C
0% over limit
Discharged 1904 mg/L against a permitted limit of 0 mg/L (DAILY MN)
DMR, Monitor Only - Overdue
Sulfate, total [as SO4]
0% over limit
Discharged 5441.85279428 kg/d against a permitted limit of 20144.43383074 kg/d (MO AVG)
DMR, Limited - Overdue
Sulfate, total [as SO4]
0% over limit
Discharged 499 mg/L against a permitted limit of 1520 mg/L (MO AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 4.12 mg/L against a permitted limit of 15 mg/L (WKLY AVG)
DMR, Limited - Overdue
Pass/Fail Survival 21 Day Chronic Daphnia Magna
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (MINIMUM)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.213 mg/L against a permitted limit of 3.5 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 2.29269998 kg/d against a permitted limit of 46.39879961 kg/d (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 6.9 mg/L against a permitted limit of 22.5 mg/L (WKLY AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 52.66399956 kg/d against a permitted limit of 198.80659833 kg/d (MO AVG)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0.099 mg/L (INST MAX)
DMR, Limited - Overdue
Selenium, total [as Se]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.06356 kg/d (MO AVG)
DMR, Limited - Overdue
Solids, total dissolved- 180 deg. C
0% over limit
Discharged 2066.3 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Pass/Fail Reproduction 21 Day Chronic Daphnia Magna
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (MINIMUM)
DMR, Monitor Only - Overdue
Selenium, total [as Se]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.00492 mg/L (MO AVG)
DMR, Limited - Overdue
Whole Effluent Toxicity [WET] - D. magna
0% over limit
Discharged 100 % against a permitted limit of 100 % (MINIMUM)
DMR, Limited - Overdue
Selenium, total [as Se]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.00696 mg/L (DAILY MX)
DMR, Limited - Overdue
Sulfate, total [as SO4]
0% over limit
Discharged 512 mg/L against a permitted limit of 1734 mg/L (DAILY MX)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 6.11 mg/L against a permitted limit of 2 mg/L (INST MIN)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 3.2 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrogen, nitrate total [as N]
0% over limit
Discharged 9.65 mg/L against a permitted limit of 12.35 mg/L (MO AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 2.652 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Solids, total dissolved- 180 deg. C
0% over limit
Discharged 2749 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
LOEC Lethal Survival Static Renewal 21 Day Chronic Daphnia magna
0% over limit
Discharged 100 % against a permitted limit of 0 % (MINIMUM)
DMR, Monitor Only - Overdue
% Mortality 21 Day Chronic Daphnia Magna
0% over limit
Discharged 0 % against a permitted limit of 0 % (MINIMUM)
DMR, Monitor Only - Overdue
% Coefficient Of Variation 21 Day Chronic Daphnia Magna
0% over limit
Discharged 13.64 % against a permitted limit of 0 % (MINIMUM)
DMR, Monitor Only - Overdue
LOEC Sub-Lethal Reproduction Static Renewal 21 Day Chronic Daphnia magna
0% over limit
Discharged 100 % against a permitted limit of 0 % (MINIMUM)
DMR, Monitor Only - Overdue
Nitrogen, nitrate total [as N]
0% over limit
Discharged 104.91485912 kg/d against a permitted limit of 163.66699862 kg/d (MO AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.51 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Overdue
E. coli
0% over limit
Discharged 26.68 MPN/100mL against a permitted limit of 126 MPN/100mL (GEO MEAN)
DMR, Limited - Overdue
E. coli
90% over limit
Discharged 770 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Overdue
E. coli
90% over limit
Discharged 770 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, nitrate total [as N]
8% over limit
Discharged 24.4 mg/L against a permitted limit of 22.59 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
E. coli
496% over limit
Discharged 2420 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
E. coli
608% over limit
Discharged 892.18 MPN/100mL against a permitted limit of 126 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Nitrogen, nitrate total [as N]
3% over limit
Discharged 12.71 mg/L against a permitted limit of 12.35 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
E. coli
48% over limit
Discharged 187.1 MPN/100mL against a permitted limit of 126 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
E. coli
496% over limit
Discharged 2420 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
E. coli
14% over limit
Discharged 143.84 MPN/100mL against a permitted limit of 126 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
E. coli
14% over limit
Discharged 461 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
E. coli
19% over limit
Discharged 2420 MPN/100mL against a permitted limit of 2030 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2024
E. coli
19% over limit
Discharged 2420 MPN/100mL against a permitted limit of 2030 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
E. coli
496% over limit
Discharged 2420 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
E. coli
90% over limit
Discharged 239.27 MPN/100mL against a permitted limit of 126 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
July 31, 2024
E. coli
56% over limit
Discharged 197.17 MPN/100mL against a permitted limit of 126 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
E. coli
496% over limit
Discharged 2420 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)