COLUMBIA WTP
NPDES ID: NC0007510
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
Zinc, total [as Zn]
18% over limit
Discharged 0.11200001 mg/L against a permitted limit of 0.0951 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
31% over limit
Discharged 0.11200001 mg/L against a permitted limit of 0.0856 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Zinc, total [as Zn]
16% over limit
Discharged 0.11000001 mg/L against a permitted limit of 0.0951 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
29% over limit
Discharged 0.11000001 mg/L against a permitted limit of 0.0856 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Zinc, total [as Zn]
242% over limit
Discharged 0.29300001 mg/L against a permitted limit of 0.0856 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
208% over limit
Discharged 0.29300001 mg/L against a permitted limit of 0.0951 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
Zinc, total [as Zn]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.0856 mg/L (30DA AVG)
DMR, Limited - Overdue
Zinc, total [as Zn]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.0951 mg/L (DAILY MX)
DMR, Limited - Overdue
Zinc, total [as Zn]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.0951 mg/L (DAILY MX)
DMR, Limited - Overdue
Zinc, total [as Zn]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.0856 mg/L (30DA AVG)
DMR, Limited - Overdue
January 31, 2025
Zinc, total [as Zn]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.0856 mg/L (30DA AVG)
DMR, Limited - Overdue
Zinc, total [as Zn]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.0951 mg/L (DAILY MX)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Zinc, total [as Zn]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.0856 mg/L (30DA AVG)
DMR, Limited - Overdue
Zinc, total [as Zn]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.0951 mg/L (DAILY MX)
DMR, Limited - Overdue
July 31, 2024
Solids, total suspended
83% over limit
Discharged 55 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
144% over limit
Discharged 110 mg/L against a permitted limit of 45 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)