OSCEOLA CITY OF STP
NPDES ID: IA0041815
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 4 effluent violations.
Violations
May 31, 2026
Copper, total [as Cu]
398% over limit
Discharged 0.134 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
224% over limit
Discharged 0.0546 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Copper, total [as Cu]
105% over limit
Discharged 0.034614 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
56% over limit
Discharged 0.042 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
Copper, total [as Cu]
191% over limit
Discharged 0.0491 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
139% over limit
Discharged 0.0644 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
22% over limit
Discharged 474.25 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Copper, total [as Cu]
287% over limit
Discharged 0.104 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
18% over limit
Discharged 460 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
310% over limit
Discharged 0.069175 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Copper, total [as Cu]
291% over limit
Discharged 0.065969 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
5% over limit
Discharged 662 mg/L against a permitted limit of 629 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
394% over limit
Discharged 0.133 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
27% over limit
Discharged 495.6 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Copper, total [as Cu]
181% over limit
Discharged 0.0756 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
49% over limit
Discharged 580.5 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
1% over limit
Discharged 636 mg/L against a permitted limit of 629 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
224% over limit
Discharged 0.0546 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Solids, total suspended
1% over limit
Discharged 45.33333 mg/L against a permitted limit of 45 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
121% over limit
Discharged 0.0595 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
165% over limit
Discharged 0.044666 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
14% over limit
Discharged 442 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Cyanide, total [as CN]
1% over limit
Discharged 0.00525 mg/L against a permitted limit of 0.0052 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
170% over limit
Discharged 0.0727 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
153% over limit
Discharged 0.042733 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Copper, total [as Cu]
206% over limit
Discharged 0.0822 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
181% over limit
Discharged 0.04745 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Copper, total [as Cu]
106% over limit
Discharged 0.0553 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
101% over limit
Discharged 0.033941 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Copper, total [as Cu]
253% over limit
Discharged 0.05958 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
1339% over limit
Discharged 0.387 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
269% over limit
Discharged 1.4360147 kg/d against a permitted limit of 0.3895774 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Copper, total [as Cu]
978% over limit
Discharged 0.29 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
29% over limit
Discharged 0.5018062 kg/d against a permitted limit of 0.3895774 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
266% over limit
Discharged 0.061769 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Copper, total [as Cu]
124% over limit
Discharged 0.03775 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
97% over limit
Discharged 0.053 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
Copper, total [as Cu]
52% over limit
Discharged 0.041 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
77% over limit
Discharged 0.029785 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Chloride [as Cl]
20% over limit
Discharged 466.25 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
1090% over limit
Discharged 0.32 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
5% over limit
Discharged 660 mg/L against a permitted limit of 629 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
285% over limit
Discharged 0.065015 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
8% over limit
Discharged 0.42164886 kg/d against a permitted limit of 0.3895774 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Chloride [as Cl]
31% over limit
Discharged 508.25 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
35% over limit
Discharged 0.022691 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
61% over limit
Discharged 0.0432 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Copper, total [as Cu]
79% over limit
Discharged 0.030276 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
8% over limit
Discharged 419.4 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
454% over limit
Discharged 0.149 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Copper, total [as Cu]
7% over limit
Discharged 0.018092 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
21% over limit
Discharged 472 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
7% over limit
Discharged 0.0288 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2024
Copper, total [as Cu]
24% over limit
Discharged 0.0334 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2024
Copper, total [as Cu]
27% over limit
Discharged 0.021478 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
52% over limit
Discharged 0.41106204 kg/d against a permitted limit of 0.269676 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
17% over limit
Discharged 0.0316 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
18% over limit
Discharged 460 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Chloride [as Cl]
6% over limit
Discharged 411 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
16% over limit
Discharged 0.019553 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
9% over limit
Discharged 0.0292 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
Copper, total [as Cu]
215% over limit
Discharged 0.0848 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
1% over limit
Discharged 393.75 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
29% over limit
Discharged 0.0217 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
24% over limit
Discharged 49.5 mg/L against a permitted limit of 40 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
July 31, 2024
Chloride [as Cl]
3% over limit
Discharged 402.6 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
391% over limit
Discharged 0.132 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
597% over limit
Discharged 6.966 mg/L against a permitted limit of 1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
18% over limit
Discharged 0.31818136 kg/d against a permitted limit of 0.269676 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
203% over limit
Discharged 11.5 mg/L against a permitted limit of 3.8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
48% over limit
Discharged 14.90093817 kg/d against a permitted limit of 10.07879992 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
E. coli
17250% over limit
Discharged 109306.8 MPN/100mL against a permitted limit of 630 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
338% over limit
Discharged 0.073964 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)