MACBRIDE SANITARY SEWER DISTRICT
NPDES ID: IA0073580
X — SNC: Effluent violation (non-monthly average limit)
The facility discharged more of a pollutant than its permit allows, measured over a period other than a monthly average.
Violations
March 31, 2026
Nitrogen, ammonia total [as N]
68% over limit
Discharged 17 mg/L against a permitted limit of 10.1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
31% over limit
Discharged 13.25 mg/L against a permitted limit of 10.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
9% over limit
Discharged 11 mg/L against a permitted limit of 10.1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
1% over limit
Discharged 392.5 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
3% over limit
Discharged 10.375 mg/L against a permitted limit of 10.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, ammonia total [as N]
103% over limit
Discharged 14 mg/L against a permitted limit of 6.9 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
92% over limit
Discharged 13.25 mg/L against a permitted limit of 6.9 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, ammonia total [as N]
117% over limit
Discharged 15 mg/L against a permitted limit of 6.9 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
97% over limit
Discharged 13.6 mg/L against a permitted limit of 6.9 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, ammonia total [as N]
62% over limit
Discharged 11.175 mg/L against a permitted limit of 6.9 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
88% over limit
Discharged 13 mg/L against a permitted limit of 6.9 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2025
Nitrogen, ammonia total [as N]
59% over limit
Discharged 11 mg/L against a permitted limit of 6.9 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
35% over limit
Discharged 9.3 mg/L against a permitted limit of 6.9 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, ammonia total [as N]
69% over limit
Discharged 14 mg/L against a permitted limit of 8.3 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
10% over limit
Discharged 9.15 mg/L against a permitted limit of 8.3 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrogen, ammonia total [as N]
18% over limit
Discharged 9.82 mg/L against a permitted limit of 8.3 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
13% over limit
Discharged 710 mg/L against a permitted limit of 629 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
57% over limit
Discharged 13 mg/L against a permitted limit of 8.3 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
7% over limit
Discharged 416 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Nitrogen, ammonia total [as N]
2% over limit
Discharged 12.5 mg/L against a permitted limit of 12.2 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
31% over limit
Discharged 16 mg/L against a permitted limit of 12.2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
118% over limit
Discharged 22 mg/L against a permitted limit of 10.1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
78% over limit
Discharged 18 mg/L against a permitted limit of 10.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, ammonia total [as N]
19% over limit
Discharged 26 mg/L against a permitted limit of 21.8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
8% over limit
Discharged 23.5 mg/L against a permitted limit of 21.8 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Nitrogen, ammonia total [as N]
46% over limit
Discharged 14.75 mg/L against a permitted limit of 10.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
68% over limit
Discharged 17 mg/L against a permitted limit of 10.1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2024
Nitrogen, ammonia total [as N]
59% over limit
Discharged 11 mg/L against a permitted limit of 6.9 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
74% over limit
Discharged 12 mg/L against a permitted limit of 6.9 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2024
Nitrogen, ammonia total [as N]
103% over limit
Discharged 14 mg/L against a permitted limit of 6.9 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
31% over limit
Discharged 9.04 mg/L against a permitted limit of 6.9 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)