ROCKY FORD WWTF
NPDES ID: CO0023850
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: 4 effluent violations.
Violations
May 31, 2026
Selenium, potentially dissolvd
85% over limit
Discharged 0.0085 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
2% over limit
Discharged 0.51 MGD against a permitted limit of 0.5 MGD (30DA AVG)
DMR, Limited - Numeric Violation
BOD, carb-5 day, 20 deg C, percent removal
4% over limit
Discharged 84.44 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
April 30, 2026
Selenium, potentially dissolvd
87% over limit
Discharged 0.0086 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
March 31, 2026
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
BOD, carb-5 day, 20 deg C, percent removal
7% over limit
Discharged 84 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
February 28, 2026
Selenium, potentially dissolvd
30% over limit
Discharged 0.006 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Chlorine, total residual
5% over limit
Discharged 0.08 mg/L against a permitted limit of 0.076 mg/L (INST MAX)
DMR, Limited - Numeric Violation
July 31, 2025
Selenium, potentially dissolvd
4% over limit
Discharged 0.0048 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Sulfide-hydrogen sulfide [undissociated]
2253% over limit
Discharged 1.2 mg/L against a permitted limit of 0.051 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
June 30, 2025
E. coli
Limit violation
Discharged 2419.6 MPN/100mL against a permitted limit of 252 MPN/100mL (MX 7D GM)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
40% over limit
Discharged 0.7 MGD against a permitted limit of 0.5 MGD (30DA AVG)
DMR, Limited - Numeric Violation
E. coli
Limit violation
Discharged 2419.6 MPN/100mL against a permitted limit of 126 MPN/100mL (30DA GM)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
70% over limit
Discharged 0.0078 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
May 31, 2025
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
Flow, in conduit or thru treatment plant
2% over limit
Discharged 0.51 MGD against a permitted limit of 0.5 MGD (30DA AVG)
DMR, Limited - Numeric Violation
BOD, carb-5 day, 20 deg C, percent removal
25% over limit
Discharged 81.25 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
April 30, 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
March 31, 2025
Selenium, potentially dissolvd
109% over limit
Discharged 0.0096 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
BOD, carb-5 day, 20 deg C, percent removal
3% over limit
Discharged 84.55 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
February 28, 2025
Selenium, potentially dissolvd
70% over limit
Discharged 0.0078 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
BOD, carb-5 day, 20 deg C, percent removal
13% over limit
Discharged 83 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
January 31, 2025
E. coli
1821% over limit
Discharged 2420 MPN/100mL against a permitted limit of 126 MPN/100mL (30DA GM)
DMR, Limited - Numeric Violation
E. coli
860% over limit
Discharged 2420 MPN/100mL against a permitted limit of 252 MPN/100mL (MX 7D GM)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
43% over limit
Discharged 0.0066 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Flow, in conduit or thru treatment plant
12% over limit
Discharged 0.56 MGD against a permitted limit of 0.5 MGD (30DA AVG)
DMR, Limited - Numeric Violation
E. coli
131% over limit
Discharged 291 MPN/100mL against a permitted limit of 126 MPN/100mL (30DA GM)
DMR, Limited - Numeric Violation
E. coli
15% over limit
Discharged 291 MPN/100mL against a permitted limit of 252 MPN/100mL (MX 7D GM)
DMR, Limited - Numeric Violation
November 30, 2024
Flow, in conduit or thru treatment plant
18% over limit
Discharged 0.59 MGD against a permitted limit of 0.5 MGD (30DA AVG)
DMR, Limited - Numeric Violation
Selenium, potentially dissolvd
52% over limit
Discharged 0.007 mg/L against a permitted limit of 0.0046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
September 30, 2024
E. coli
83% over limit
Discharged 231 MPN/100mL against a permitted limit of 126 MPN/100mL (30DA GM)
DMR, Limited - Numeric Violation
August 31, 2024
E. coli
45% over limit
Discharged 365 MPN/100mL against a permitted limit of 252 MPN/100mL (MX 7D GM)
DMR, Limited - Numeric Violation
Sulfide-hydrogen sulfide [undissociated]
3233% over limit
Discharged 1.7 mg/L against a permitted limit of 0.051 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
E. coli
190% over limit
Discharged 365 MPN/100mL against a permitted limit of 126 MPN/100mL (30DA GM)
DMR, Limited - Numeric Violation
July 31, 2024
E. coli
67% over limit
Discharged 210 MPN/100mL against a permitted limit of 126 MPN/100mL (30DA GM)
DMR, Limited - Numeric Violation
Sulfide-hydrogen sulfide [undissociated]
2841% over limit
Discharged 1.5 mg/L against a permitted limit of 0.051 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)