MACHADO CONSTRUCTION COMPANY,INC.
NPDES ID: MDG491376
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.
This quarter: 3 effluent violations.
Violations
March 31, 2026
pH
0% over limit
Discharged 9.56 SU against a permitted limit of 8.5 SU (MO AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 500 SU against a permitted limit of 9 SU (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
pH
0% over limit
Discharged 8.8 SU against a permitted limit of 8.5 SU (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
1447% over limit
Discharged 464 mg/L against a permitted limit of 30 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.8 SU against a permitted limit of 9 SU (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
673% over limit
Discharged 464 mg/L against a permitted limit of 60 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Oil and grease
3400% over limit
Discharged 525 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Oil and grease
3400% over limit
Discharged 525 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
1447% over limit
Discharged 464 mg/L against a permitted limit of 30 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
Oil and grease
156% over limit
Discharged 38.4 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
673% over limit
Discharged 464 mg/L against a permitted limit of 60 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.8 SU against a permitted limit of 8.5 SU (MO AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 8.98 SU against a permitted limit of 8.5 SU (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
pH
0% over limit
Discharged 9.29 SU against a permitted limit of 9 SU (DAILY MX)
DMR, Limited - Numeric Violation
Oil and grease
53% over limit
Discharged 22.9 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.29 SU against a permitted limit of 8.5 SU (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
pH
0% over limit
Discharged 8.7 SU against a permitted limit of 8.5 SU (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Solids, total suspended
30% over limit
Discharged 39 mg/L against a permitted limit of 30 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 8.8 SU against a permitted limit of 8.5 SU (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
pH
0% over limit
Discharged 9.6 SU against a permitted limit of 9 SU (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.6 SU against a permitted limit of 9 SU (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.6 SU against a permitted limit of 8.5 SU (MO AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.6 SU against a permitted limit of 8.5 SU (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2025
pH
0% over limit
Discharged 9.6 SU against a permitted limit of 9 SU (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.6 SU against a permitted limit of 8.5 SU (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
pH
0% over limit
Discharged 8.8 SU against a permitted limit of 8.5 SU (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Solids, total suspended
2707% over limit
Discharged 842 mg/L against a permitted limit of 30 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.25 SU against a permitted limit of 8.5 SU (MO AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.25 SU against a permitted limit of 9 SU (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
1303% over limit
Discharged 842 mg/L against a permitted limit of 60 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Oil and grease
29% over limit
Discharged 19.3 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2024
Solids, total suspended
23% over limit
Discharged 37 mg/L against a permitted limit of 30 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)