GYPSUM TOWN OF WWTF
NPDES ID: CO0048830
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
Nitrogen, ammonia total [as N]
50% over limit
Discharged 4.5 mg/L against a permitted limit of 3 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Nitrogen, nitrite total [as N]
260% over limit
Discharged 0.18 mg/L against a permitted limit of 0.05 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Acrylamide
7842% over limit
Discharged 0.00413 mg/L against a permitted limit of 0.000052 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, nitrite total [as N]
660% over limit
Discharged 0.38 mg/L against a permitted limit of 0.05 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Acrylamide
7842% over limit
Discharged 0.00413 mg/L against a permitted limit of 0.000052 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
107% over limit
Discharged 6.2 mg/L against a permitted limit of 3 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, nitrite total [as N]
1840% over limit
Discharged 0.97 mg/L against a permitted limit of 0.05 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Acrylamide
7842% over limit
Discharged 0.00413 mg/L against a permitted limit of 0.000052 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
55% over limit
Discharged 3.1 mg/L against a permitted limit of 2 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Nitrogen, nitrite total [as N]
400% over limit
Discharged 0.25 mg/L against a permitted limit of 0.05 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Acrylamide
7842% over limit
Discharged 0.00413 mg/L against a permitted limit of 0.000052 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
172% over limit
Discharged 5.16 mg/L against a permitted limit of 1.9 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Nitrogen, nitrite total [as N]
200% over limit
Discharged 0.15 mg/L against a permitted limit of 0.05 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Acrylamide
7842% over limit
Discharged 0.00413 mg/L against a permitted limit of 0.000052 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, nitrite total [as N]
322% over limit
Discharged 0.211 mg/L against a permitted limit of 0.05 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Acrylamide
7842% over limit
Discharged 0.00413 mg/L against a permitted limit of 0.000052 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, ammonia total [as N]
167% over limit
Discharged 5.88 mg/L against a permitted limit of 2.2 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Nitrogen, nitrite total [as N]
284% over limit
Discharged 0.192 mg/L against a permitted limit of 0.05 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Acrylamide
7842% over limit
Discharged 0.00413 mg/L against a permitted limit of 0.000052 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, nitrite total [as N]
314% over limit
Discharged 0.207 mg/L against a permitted limit of 0.05 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
78% over limit
Discharged 5.35 mg/L against a permitted limit of 3 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Acrylamide
7842% over limit
Discharged 0.00413 mg/L against a permitted limit of 0.000052 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Acrylamide
7848% over limit
Discharged 0.004133 mg/L against a permitted limit of 0.000052 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
103% over limit
Discharged 5.277 mg/L against a permitted limit of 2.6 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Nitrogen, nitrite total [as N]
296% over limit
Discharged 0.198 mg/L against a permitted limit of 0.05 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Nitrogen, ammonia total [as N]
94% over limit
Discharged 5.25 mg/L against a permitted limit of 2.7 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Acrylamide
7842% over limit
Discharged 0.00413 mg/L against a permitted limit of 0.000052 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Nitrogen, nitrite total [as N]
128% over limit
Discharged 0.114 mg/L against a permitted limit of 0.05 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, nitrite total [as N]
380% over limit
Discharged 0.24 mg/L against a permitted limit of 0.05 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Acrylamide
7842% over limit
Discharged 0.00413 mg/L against a permitted limit of 0.000052 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
73% over limit
Discharged 5.02 mg/L against a permitted limit of 2.9 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Acrylamide
7842% over limit
Discharged 0.00413 mg/L against a permitted limit of 0.000052 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Acrylamide
7842% over limit
Discharged 0.00413 mg/L against a permitted limit of 0.000052 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Nitrogen, nitrite total [as N]
68% over limit
Discharged 0.47 mg/L against a permitted limit of 0.28 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
Acrylamide
7785% over limit
Discharged 0.0041 mg/L against a permitted limit of 0.000052 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Nitrogen, nitrite total [as N]
7% over limit
Discharged 0.3 mg/L against a permitted limit of 0.28 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Acrylamide
21465% over limit
Discharged 0.0992 mg/L against a permitted limit of 0.00046 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Acrylamide
7842% over limit
Discharged 0.00413 mg/L against a permitted limit of 0.000052 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Nitrogen, nitrite total [as N]
114% over limit
Discharged 0.6 mg/L against a permitted limit of 0.28 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, nitrite total [as N]
214% over limit
Discharged 0.88 mg/L against a permitted limit of 0.28 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
BOD, 5-day, 20 deg. C
112% over limit
Discharged 95.5 mg/L against a permitted limit of 45 mg/L (MX 7D AV)
DMR, Limited - Numeric Violation
Solids, total suspended
84% over limit
Discharged 83 mg/L against a permitted limit of 45 mg/L (MX 7D AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
18% over limit
Discharged 35.4 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, nitrite total [as N]
88% over limit
Discharged 0.525 mg/L against a permitted limit of 0.28 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Solids, total suspended
46% over limit
Discharged 43.67 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
40% over limit
Discharged 42.05 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
74% over limit
Discharged 78.3 mg/L against a permitted limit of 45 mg/L (MX 7D AV)
DMR, Limited - Numeric Violation
Solids, total suspended
112% over limit
Discharged 95.33 mg/L against a permitted limit of 45 mg/L (MX 7D AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
46% over limit
Discharged 38 mg/L against a permitted limit of 26 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, nitrite total [as N]
34% over limit
Discharged 0.374 mg/L against a permitted limit of 0.28 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2024
Nitrogen, nitrite total [as N]
11% over limit
Discharged 0.31 mg/L against a permitted limit of 0.28 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)