BERTHOUD ESTATES WWTF
NPDES ID: COG591097
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: 6 effluent violations.
Violations
May 31, 2026
Manganese, dissolved [as Mn]
41% over limit
Discharged 0.12730001 mg/L against a permitted limit of 0.09 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Sulfate
14% over limit
Discharged 1320 mg/L against a permitted limit of 1155 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
224% over limit
Discharged 0.0149 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, ammonia total [as N]
128% over limit
Discharged 10.5 mg/L against a permitted limit of 4.6 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Sulfate
28% over limit
Discharged 1480 mg/L against a permitted limit of 1155 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Manganese, dissolved [as Mn]
96% over limit
Discharged 0.17660001 mg/L against a permitted limit of 0.09 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Selenium, potentially dissolvd
261% over limit
Discharged 0.0166 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Manganese, dissolved [as Mn]
31% over limit
Discharged 0.11770001 mg/L against a permitted limit of 0.09 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Sulfate
20% over limit
Discharged 1390 mg/L against a permitted limit of 1155 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Selenium, potentially dissolvd
307% over limit
Discharged 0.0187 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Sulfate
16% over limit
Discharged 1340 mg/L against a permitted limit of 1155 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
2% over limit
Discharged 0.0187 mg/L against a permitted limit of 0.0184 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
Selenium, potentially dissolvd
4% over limit
Discharged 0.0192 mg/L against a permitted limit of 0.0184 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Manganese, dissolved [as Mn]
3% over limit
Discharged 0.093 mg/L against a permitted limit of 0.09 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
317% over limit
Discharged 0.0192 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Sulfate
2% over limit
Discharged 1180 mg/L against a permitted limit of 1155 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
42% over limit
Discharged 78.64 % against a permitted limit of 85 % (MINIMUM)
DMR, Limited - Numeric Violation
December 31, 2025
Selenium, potentially dissolvd
196% over limit
Discharged 0.0136 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Sulfate
25% over limit
Discharged 1440 mg/L against a permitted limit of 1155 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Sulfate
25% over limit
Discharged 1440 mg/L against a permitted limit of 1155 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
196% over limit
Discharged 0.0136 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Selenium, potentially dissolvd
113% over limit
Discharged 0.0098 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Sulfate
43% over limit
Discharged 1650 mg/L against a permitted limit of 1155 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Manganese, dissolved [as Mn]
27% over limit
Discharged 0.11470001 mg/L against a permitted limit of 0.09 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, nitrite total [as N]
489% over limit
Discharged 11.2 mg/L against a permitted limit of 1.9 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, nitrite total [as N]
500% over limit
Discharged 11.4 mg/L against a permitted limit of 1.9 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Sulfate
3% over limit
Discharged 1190 mg/L against a permitted limit of 1155 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Manganese, dissolved [as Mn]
77% over limit
Discharged 0.15940001 mg/L against a permitted limit of 0.09 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
235% over limit
Discharged 0.0154 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Manganese, dissolved [as Mn]
48% over limit
Discharged 0.13350001 mg/L against a permitted limit of 0.09 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Sulfate
36% over limit
Discharged 1570 mg/L against a permitted limit of 1155 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
289% over limit
Discharged 0.0179 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Manganese, dissolved [as Mn]
22% over limit
Discharged 0.11000001 mg/L against a permitted limit of 0.09 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
775% over limit
Discharged 0.16100001 mg/L against a permitted limit of 0.0184 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
3400% over limit
Discharged 0.16100001 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Sulfate
10% over limit
Discharged 1270 mg/L against a permitted limit of 1155 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, nitrite total [as N]
420% over limit
Discharged 9.88 mg/L against a permitted limit of 1.9 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Selenium, potentially dissolvd
276% over limit
Discharged 0.0173 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Manganese, dissolved [as Mn]
34% over limit
Discharged 0.12050001 mg/L against a permitted limit of 0.09 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, nitrite total [as N]
589% over limit
Discharged 13.1 mg/L against a permitted limit of 1.9 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Zinc, potentially dissolved
31463% over limit
Discharged 9.17079992 kg/d against a permitted limit of 0.029056 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
Sulfate
24% over limit
Discharged 1430 mg/L against a permitted limit of 1155 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Selenium, potentially dissolvd
276% over limit
Discharged 0.0173 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Manganese, dissolved [as Mn]
34% over limit
Discharged 0.12050001 mg/L against a permitted limit of 0.09 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Sulfate
24% over limit
Discharged 1430 mg/L against a permitted limit of 1155 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Manganese, dissolved [as Mn]
1% over limit
Discharged 0.091 mg/L against a permitted limit of 0.09 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Sulfate
39% over limit
Discharged 1610 mg/L against a permitted limit of 1155 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
38% over limit
Discharged 0.0253 mg/L against a permitted limit of 0.0184 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
450% over limit
Discharged 0.0253 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Zinc, potentially dissolved
22978% over limit
Discharged 6.70557994 kg/d against a permitted limit of 0.029056 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
361% over limit
Discharged 0.0212 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
15% over limit
Discharged 0.0212 mg/L against a permitted limit of 0.0184 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Selenium, potentially dissolvd
361% over limit
Discharged 0.0212 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
15% over limit
Discharged 0.0212 mg/L against a permitted limit of 0.0184 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Sulfate
50% over limit
Discharged 1730 mg/L against a permitted limit of 1155 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)