LIMON WWTF
NPDES ID: COG591023
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: 8 effluent violations.
Violations
May 31, 2026
Manganese, dissolved [as Mn]
1125% over limit
Discharged 0.86950004 mg/L against a permitted limit of 0.071 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
84% over limit
Discharged 29.5 mg/L against a permitted limit of 16 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
17% over limit
Discharged 0.0054 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
98% over limit
Discharged 31.6 mg/L against a permitted limit of 16 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2026
Manganese, dissolved [as Mn]
2449% over limit
Discharged 1.81000009 mg/L against a permitted limit of 0.071 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
22% over limit
Discharged 0.0056 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
56% over limit
Discharged 24.9 mg/L against a permitted limit of 16 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
71% over limit
Discharged 27.4 mg/L against a permitted limit of 16 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
Manganese, dissolved [as Mn]
2435% over limit
Discharged 1.80000009 mg/L against a permitted limit of 0.071 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
59% over limit
Discharged 0.0073 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Manganese, dissolved [as Mn]
3041% over limit
Discharged 2.23000011 mg/L against a permitted limit of 0.071 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
9% over limit
Discharged 273 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
91% over limit
Discharged 0.0088 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Chloride [as Cl]
20% over limit
Discharged 301 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Manganese, dissolved [as Mn]
1646% over limit
Discharged 1.24000006 mg/L against a permitted limit of 0.071 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
117% over limit
Discharged 0.01 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
51% over limit
Discharged 28.6 mg/L against a permitted limit of 19 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
7% over limit
Discharged 267 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
52% over limit
Discharged 28.8 mg/L against a permitted limit of 19 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
107% over limit
Discharged 0.0095 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Manganese, dissolved [as Mn]
490% over limit
Discharged 0.41910002 mg/L against a permitted limit of 0.071 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Selenium, potentially dissolvd
89% over limit
Discharged 0.0087 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
10% over limit
Discharged 20.9 mg/L against a permitted limit of 19 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
8% over limit
Discharged 270 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Manganese, dissolved [as Mn]
265% over limit
Discharged 0.25920001 mg/L against a permitted limit of 0.071 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Selenium, potentially dissolvd
39% over limit
Discharged 0.0064 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Manganese, dissolved [as Mn]
196% over limit
Discharged 0.21040001 mg/L against a permitted limit of 0.071 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
11% over limit
Discharged 277 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, ammonia total [as N]
46% over limit
Discharged 14.6 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
80% over limit
Discharged 0.0083 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
25% over limit
Discharged 12.1 mg/L against a permitted limit of 9.7 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Manganese, dissolved [as Mn]
65% over limit
Discharged 0.11730001 mg/L against a permitted limit of 0.071 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
1% over limit
Discharged 252 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Selenium, potentially dissolvd
111% over limit
Discharged 0.0097 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Manganese, dissolved [as Mn]
105% over limit
Discharged 0.14540001 mg/L against a permitted limit of 0.071 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
12% over limit
Discharged 279 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Selenium, potentially dissolvd
48% over limit
Discharged 0.0068 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
163% over limit
Discharged 25.5 mg/L against a permitted limit of 9.7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
5% over limit
Discharged 262 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
92% over limit
Discharged 18.6 mg/L against a permitted limit of 9.7 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Nitrogen, ammonia total [as N]
108% over limit
Discharged 33.3 mg/L against a permitted limit of 16 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
30% over limit
Discharged 324 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
87% over limit
Discharged 29.9 mg/L against a permitted limit of 16 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Manganese, dissolved [as Mn]
134% over limit
Discharged 0.16590001 mg/L against a permitted limit of 0.071 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
57% over limit
Discharged 0.0072 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrogen, ammonia total [as N]
84% over limit
Discharged 29.4 mg/L against a permitted limit of 16 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
57% over limit
Discharged 25.1 mg/L against a permitted limit of 16 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Manganese, dissolved [as Mn]
336% over limit
Discharged 0.30940001 mg/L against a permitted limit of 0.071 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
11% over limit
Discharged 0.0051 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Nitrogen, ammonia total [as N]
33% over limit
Discharged 21.2 mg/L against a permitted limit of 16 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Manganese, dissolved [as Mn]
80% over limit
Discharged 0.12780001 mg/L against a permitted limit of 0.071 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
133% over limit
Discharged 0.0107 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
51% over limit
Discharged 24.1 mg/L against a permitted limit of 16 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Manganese, dissolved [as Mn]
376% over limit
Discharged 0.33810002 mg/L against a permitted limit of 0.071 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
10% over limit
Discharged 275 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
172% over limit
Discharged 0.0125 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Chloride [as Cl]
32% over limit
Discharged 329 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Manganese, dissolved [as Mn]
114% over limit
Discharged 0.15220001 mg/L against a permitted limit of 0.071 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
170% over limit
Discharged 0.0124 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Manganese, dissolved [as Mn]
254% over limit
Discharged 0.25140001 mg/L against a permitted limit of 0.071 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
21% over limit
Discharged 302 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
170% over limit
Discharged 0.0124 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Selenium, potentially dissolvd
124% over limit
Discharged 0.0103 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
49% over limit
Discharged 28.3 mg/L against a permitted limit of 19 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
93% over limit
Discharged 36.6 mg/L against a permitted limit of 19 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
12% over limit
Discharged 281 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Manganese, dissolved [as Mn]
531% over limit
Discharged 0.44790002 mg/L against a permitted limit of 0.071 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Selenium, potentially dissolvd
0% over limit
Discharged 0 mg/L against a permitted limit of 0.018 mg/L (DAILY MX)
DMR, Limited - Overdue
Manganese, dissolved [as Mn]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.071 mg/L (30DA AVG)
DMR, Limited - Overdue
Nitrogen, nitrite total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Nitrogen, inorganic total
0% over limit
Discharged 0 mg/L against a permitted limit of 42 mg/L (DAILY MX)
DMR, Limited - Overdue
Uranium, total
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Sulfide-hydrogen sulfide [undissociated]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.002 mg/L (30DA AVG)
DMR, Limited - Overdue
Selenium, potentially dissolvd
0% over limit
Discharged 0 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Overdue
Chloride [as Cl]
0% over limit
Discharged 0 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 19 mg/L (DAILY MX)
DMR, Limited - Overdue
Uranium, total
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 19 mg/L (30DA AVG)
DMR, Limited - Overdue
Sulfate
0% over limit
Discharged 0 mg/L against a permitted limit of 1279 mg/L (30DA AVG)
DMR, Limited - Overdue
October 31, 2024
Sulfate
0% over limit
Discharged 0 mg/L against a permitted limit of 1279 mg/L (30DA AVG)
DMR, Limited - Overdue
Chloride [as Cl]
0% over limit
Discharged 0 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Overdue
Uranium, total
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Selenium, potentially dissolvd
0% over limit
Discharged 0 mg/L against a permitted limit of 0.018 mg/L (DAILY MX)
DMR, Limited - Overdue
Uranium, total
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Selenium, potentially dissolvd
0% over limit
Discharged 0 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Overdue
Manganese, dissolved [as Mn]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.071 mg/L (30DA AVG)
DMR, Limited - Overdue
Sulfide-hydrogen sulfide [undissociated]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.002 mg/L (30DA AVG)
DMR, Limited - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)