LYTTON CITY OF STP
NPDES ID: IA0020940
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: 5 effluent violations.
Violations
May 31, 2026
Chloride [as Cl]
131% over limit
Discharged 900 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
43% over limit
Discharged 900 mg/L against a permitted limit of 629 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
60% over limit
Discharged 64 mg/L against a permitted limit of 40 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
156% over limit
Discharged 64 mg/L against a permitted limit of 25 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
11% over limit
Discharged 2865.89585992 kg/d against a permitted limit of 2572.36397839 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 80 mg/L (30DA AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 0 mg/L against a permitted limit of 40 mg/L (7 DA AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 0 mg/L against a permitted limit of 25 mg/L (30DA AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 120 mg/L (7 DA AVG)
DMR, Limited - Overdue
December 31, 2025
Chloride [as Cl]
23% over limit
Discharged 3164.79084341 kg/d against a permitted limit of 2572.36397839 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
2% over limit
Discharged 25.5 mg/L against a permitted limit of 25 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
229% over limit
Discharged 1280 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
103% over limit
Discharged 1280 mg/L against a permitted limit of 629 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
Chloride [as Cl]
236% over limit
Discharged 1308 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
108% over limit
Discharged 1308 mg/L against a permitted limit of 629 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
4% over limit
Discharged 26 mg/L against a permitted limit of 25 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
5% over limit
Discharged 84 mg/L against a permitted limit of 80 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Chloride [as Cl]
192% over limit
Discharged 1137.5 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
51% over limit
Discharged 60.4 mg/L against a permitted limit of 40 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
93% over limit
Discharged 48.3 mg/L against a permitted limit of 25 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
10% over limit
Discharged 4573.87290157 kg/d against a permitted limit of 4162.27196503 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
81% over limit
Discharged 1138 mg/L against a permitted limit of 629 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
9% over limit
Discharged 2793.21545453 kg/d against a permitted limit of 2572.36397839 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Chloride [as Cl]
8% over limit
Discharged 2780.98923463 kg/d against a permitted limit of 2572.36397839 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
276% over limit
Discharged 1463.5 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
70% over limit
Discharged 42.55 mg/L against a permitted limit of 25 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
134% over limit
Discharged 1473 mg/L against a permitted limit of 629 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
9% over limit
Discharged 43.6 mg/L against a permitted limit of 40 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)