WASHINGTON NAVY YARD
NPDES ID: DC0000141
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: 4 effluent violations.
Violations
May 31, 2026
Polynuclear Aromatic Hydrocarbons [PAHs]
29253% over limit
Discharged 0.001632 mg/L against a permitted limit of 0.00000556 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
36590% over limit
Discharged 0.0003192 mg/L against a permitted limit of 8.7e-7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
6425% over limit
Discharged 0.0005683 mg/L against a permitted limit of 0.00000871 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
59704% over limit
Discharged 0.0003349 mg/L against a permitted limit of 5.6e-7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
Polynuclear Aromatic Hydrocarbons [PAHs]
6589% over limit
Discharged 0.002348 mg/L against a permitted limit of 0.0000351 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
8926% over limit
Discharged 0.0001381 mg/L against a permitted limit of 0.00000153 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
6006% over limit
Discharged 0.0003395 mg/L against a permitted limit of 0.00000556 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
2% over limit
Discharged 0.37000002 mg/L against a permitted limit of 0.36200002 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
27043% over limit
Discharged 0.000152 mg/L against a permitted limit of 5.6e-7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
1100% over limit
Discharged 0.0001045 mg/L against a permitted limit of 0.00000871 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
9203% over limit
Discharged 0.000267 mg/L against a permitted limit of 0.00000287 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
6277% over limit
Discharged 0.0000727 mg/L against a permitted limit of 0.00000114 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
1949% over limit
Discharged 0.0003135 mg/L against a permitted limit of 0.0000153 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
47410% over limit
Discharged 0.0016676 mg/L against a permitted limit of 0.00000351 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
5808% over limit
Discharged 0.0000514 mg/L against a permitted limit of 8.7e-7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
1470% over limit
Discharged 0.0004507 mg/L against a permitted limit of 0.0000287 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
Zinc, total [as Zn]
16% over limit
Discharged 0.07998 kg/d against a permitted limit of 0.06882 kg/d (MAXIMUM)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
196% over limit
Discharged 2.37125202 kg/d against a permitted limit of 0.79980001 kg/d (MAXIMUM)
DMR, Limited - Numeric Violation
Polychlorinated biphenyls [PCBs]
0% over limit
Discharged 7.6e-7 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
95% over limit
Discharged 0.204724 kg/d against a permitted limit of 0.104904 kg/d (MAXIMUM)
DMR, Limited - Numeric Violation
Polychlorinated biphenyls [PCBs]
0% over limit
Discharged 0.00000108 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Polychlorinated biphenyls [PCBs]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Polychlorinated biphenyls [PCBs]
0% over limit
Discharged 0.00000159 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Polychlorinated biphenyls [PCBs]
0% over limit
Discharged 0.0000107 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Polychlorinated biphenyls [PCBs]
0% over limit
Discharged 0.00000241 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Polychlorinated biphenyls [PCBs]
0% over limit
Discharged 9.2e-7 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
47% over limit
Discharged 10.91299211 kg/d against a permitted limit of 7.44000007 kg/d (MAXIMUM)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
16% over limit
Discharged 0.0263624 kg/d against a permitted limit of 0.022816 kg/d (MAXIMUM)
DMR, Limited - Numeric Violation
Polychlorinated biphenyls [PCBs]
0% over limit
Discharged 1.1e-7 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Polychlorinated biphenyls [PCBs]
0% over limit
Discharged 4.1e-7 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Polychlorinated biphenyls [PCBs]
0% over limit
Discharged 3.5e-7 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Polychlorinated biphenyls [PCBs]
0% over limit
Discharged 4.3e-7 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
November 30, 2025
Polynuclear Aromatic Hydrocarbons [PAHs]
785% over limit
Discharged 0.0000492 mg/L against a permitted limit of 0.00000556 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
278% over limit
Discharged 0.0001086 mg/L against a permitted limit of 0.0000287 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
35934% over limit
Discharged 0.0003135 mg/L against a permitted limit of 8.7e-7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
1391% over limit
Discharged 0.0000428 mg/L against a permitted limit of 0.00000287 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
5530% over limit
Discharged 0.0004904 mg/L against a permitted limit of 0.00000871 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
7686% over limit
Discharged 0.0000436 mg/L against a permitted limit of 5.6e-7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Oil & Grease
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Polynuclear Aromatic Hydrocarbons [PAHs]
26% over limit
Discharged 0.0000442 mg/L against a permitted limit of 0.0000351 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Polynuclear Aromatic Hydrocarbons [PAHs]
827% over limit
Discharged 0.0001418 mg/L against a permitted limit of 0.0000153 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
830% over limit
Discharged 0.0000517 mg/L against a permitted limit of 0.00000556 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
21% over limit
Discharged 0.11000001 mg/L against a permitted limit of 0.091 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
1049% over limit
Discharged 0.0000639 mg/L against a permitted limit of 0.00000556 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Polynuclear Aromatic Hydrocarbons [PAHs]
12829% over limit
Discharged 0.0000724 mg/L against a permitted limit of 5.6e-7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
1396% over limit
Discharged 0.0000832 mg/L against a permitted limit of 0.00000556 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
60% over limit
Discharged 0.000056 mg/L against a permitted limit of 0.0000351 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
870% over limit
Discharged 0.0001213 mg/L against a permitted limit of 0.0000125 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
1531% over limit
Discharged 0.0001859 mg/L against a permitted limit of 0.0000114 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
728% over limit
Discharged 0.0000721 mg/L against a permitted limit of 0.00000871 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
12554% over limit
Discharged 0.0001936 mg/L against a permitted limit of 0.00000153 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
2086% over limit
Discharged 0.0003345 mg/L against a permitted limit of 0.0000153 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
49% over limit
Discharged 0.000013 mg/L against a permitted limit of 0.00000871 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
7005% over limit
Discharged 0.000081 mg/L against a permitted limit of 0.00000114 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
495% over limit
Discharged 0.0000209 mg/L against a permitted limit of 0.00000351 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
10118% over limit
Discharged 0.0000889 mg/L against a permitted limit of 8.7e-7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
3096% over limit
Discharged 0.0001777 mg/L against a permitted limit of 0.00000556 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
72% over limit
Discharged 0.0000187 mg/L against a permitted limit of 0.0000109 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
1732% over limit
Discharged 0.0000229 mg/L against a permitted limit of 0.00000125 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
237% over limit
Discharged 0.0000547 mg/L against a permitted limit of 0.00001625 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Polynuclear Aromatic Hydrocarbons [PAHs]
44% over limit
Discharged 0.0000164 mg/L against a permitted limit of 0.0000114 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
210% over limit
Discharged 0.0000474 mg/L against a permitted limit of 0.0000153 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
2932% over limit
Discharged 0.0002641 mg/L against a permitted limit of 0.00000871 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
269% over limit
Discharged 0.52000002 mg/L against a permitted limit of 0.14100001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
19659% over limit
Discharged 0.0001719 mg/L against a permitted limit of 8.7e-7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
46% over limit
Discharged 0.153264 kg/d against a permitted limit of 0.104904 kg/d (MAXIMUM)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
428% over limit
Discharged 0.0000576 mg/L against a permitted limit of 0.0000109 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
147% over limit
Discharged 0.0000867 mg/L against a permitted limit of 0.0000351 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
2395% over limit
Discharged 0.0000272 mg/L against a permitted limit of 0.00000109 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
2619% over limit
Discharged 0.0001512 mg/L against a permitted limit of 0.00000556 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
3945% over limit
Discharged 0.0002249 mg/L against a permitted limit of 0.00000556 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
26% over limit
Discharged 9.40552409 kg/d against a permitted limit of 7.44000007 kg/d (MAXIMUM)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
106% over limit
Discharged 1.64523202 kg/d against a permitted limit of 0.79980001 kg/d (MAXIMUM)
DMR, Limited - Numeric Violation
November 30, 2024
Polynuclear Aromatic Hydrocarbons [PAHs]
1253471% over limit
Discharged 0.00702 mg/L against a permitted limit of 5.6e-7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
57050% over limit
Discharged 0.008744 mg/L against a permitted limit of 0.0000153 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
58% over limit
Discharged 0.18000001 mg/L against a permitted limit of 0.11400001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
103317% over limit
Discharged 0.00575 mg/L against a permitted limit of 0.00000556 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
303% over limit
Discharged 0.0001416 mg/L against a permitted limit of 0.0000351 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
85680% over limit
Discharged 0.000935 mg/L against a permitted limit of 0.00000109 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
43% over limit
Discharged 0.17000001 mg/L against a permitted limit of 0.11900001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
13786% over limit
Discharged 0.0001583 mg/L against a permitted limit of 0.00000114 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
1162% over limit
Discharged 0.0000443 mg/L against a permitted limit of 0.00000351 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
43% over limit
Discharged 0.13000001 mg/L against a permitted limit of 0.091 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
30531% over limit
Discharged 0.002668 mg/L against a permitted limit of 0.00000871 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
11643% over limit
Discharged 0.00128 mg/L against a permitted limit of 0.0000109 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
751% over limit
Discharged 1.20000006 mg/L against a permitted limit of 0.14100001 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
900% over limit
Discharged 0.000125 mg/L against a permitted limit of 0.0000125 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
7644% over limit
Discharged 0.0000968 mg/L against a permitted limit of 0.00000125 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
211946% over limit
Discharged 0.0018448 mg/L against a permitted limit of 8.7e-7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
1451% over limit
Discharged 0.0002521 mg/L against a permitted limit of 0.00001625 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Lead, total [as Pb]
1823% over limit
Discharged 0.50000002 mg/L against a permitted limit of 0.026 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
1955% over limit
Discharged 0.0002343 mg/L against a permitted limit of 0.0000114 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
8360% over limit
Discharged 0.0001379 mg/L against a permitted limit of 0.00000163 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
1983% over limit
Discharged 0.0001158 mg/L against a permitted limit of 0.00000556 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
1433% over limit
Discharged 0.0001335 mg/L against a permitted limit of 0.00000871 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
4808% over limit
Discharged 0.0000427 mg/L against a permitted limit of 8.7e-7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2024
Polynuclear Aromatic Hydrocarbons [PAHs]
542% over limit
Discharged 0.0000732 mg/L against a permitted limit of 0.0000114 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
565% over limit
Discharged 0.0000579 mg/L against a permitted limit of 0.00000871 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
5312% over limit
Discharged 0.0000617 mg/L against a permitted limit of 0.00000114 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
242% over limit
Discharged 0.0000524 mg/L against a permitted limit of 0.0000153 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
922% over limit
Discharged 0.0000568 mg/L against a permitted limit of 0.00000556 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
120% over limit
Discharged 0.000063 mg/L against a permitted limit of 0.0000287 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
580% over limit
Discharged 0.0000378 mg/L against a permitted limit of 0.00000556 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Polynuclear Aromatic Hydrocarbons [PAHs]
24% over limit
Discharged 0.0000155 mg/L against a permitted limit of 0.0000125 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)