Port of Seattle

NPDES permit WA0024651 · Minor NON-POTW · administratively continued, expires 2026-08-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

EPA's record, 2025-09-01 to 2026-08-31

2values over a limit
100required values missing, on 14 form(s)
0of 268 forms filed late

Last period with anything received: 2026-07-31. Most often over: Flow (1), Zinc, total [as Zn] (1).

Reporting

Reports are due about 15 days after each monitoring period ends (the most common figure among WA permits in EPA's filings — check your permit).

Limits in force (213)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. CDAILY MX <= 2665 lb/d Jan, Feb, Mar, Nov, Dec
001BOD, 5-day, 20 deg. CDAILY MX <= 1480 lb/d Apr, May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedAVERAGE <= 21 mg/L all year
001Oil and grease, hexane extr methodAVERAGE <= 8 mg/L all year
001Propylene glycol, totalDAILY MX report only (alert) Jan, Feb, Mar, Nov, Dec
001pH, maximumDAILY MX <= 9 SU all year
001pH, minimumDAILY MN >= 6 SU all year
001FlowAVERAGE report only (alert) all year
001FlowDAILY MX report only (alert) all year
0D00TurbidityDAILY MX report only (alert) all year
0D00pHDAILY MN >= 6.5 SU all year
0D00pHDAILY MX <= 8.5 SU all year
0D00Oil and grease, hexane extr methodDAILY MX <= 5 mg/L all year
0D00Turbidity, increase over backgroundDAILY MX <= 5 NTU all year
0D00FlowDAILY MX report only (alert) all year
0D00Turbidity, % increas over intakeDAILY MX <= 10 % all year
0D00Oil and grease visualDAILY MX <= 0 N=0;Y=1 all year
0D5TurbidityDAILY MX report only (alert) all year
0D5pHDAILY MN >= 6.5 SU all year
0D5pHDAILY MX <= 8.5 SU all year
0D5Oil and grease, hexane extr methodDAILY MX <= 5 mg/L all year
0D5Turbidity, increase over backgroundDAILY MX <= 5 NTU all year
0D5FlowDAILY MX report only (alert) all year
0D5Turbidity, % increas over intakeDAILY MX <= 10 % all year
0D5Oil and grease visualDAILY MX <= 0 N=0;Y=1 all year
BG00TurbidityDAILY MX report only (alert) all year
BG01TurbidityDAILY MX report only (alert) all year
BG02TurbidityDAILY MX report only (alert) all year
BG03TurbidityDAILY MX report only (alert) all year
BG10TurbidityDAILY MX report only (alert) all year
BG13TurbidityDAILY MX report only (alert) all year
BG29TurbidityDAILY MX report only (alert) all year
BGD5TurbidityDAILY MX report only (alert) all year
BWBDOil & GreaseDAILY MX <= 100 mg/L all year
D10TurbidityDAILY MX report only (alert) all year
D10pHDAILY MN >= 6.5 SU all year
D10pHDAILY MX <= 8.5 SU all year
D10Oil and grease, hexane extr methodDAILY MX <= 5 mg/L all year
D10Turbidity, increase over backgroundDAILY MX <= 5 NTU all year
D10FlowDAILY MX report only (alert) all year
D10Turbidity, % increas over intakeDAILY MX <= 10 % all year
D10Oil and grease visualDAILY MX <= 0 N=0;Y=1 all year
D10CTurbidityDAILY MX <= 5 NTU all year
D10CpHDAILY MN >= 6.5 SU all year
D10CpHDAILY MX <= 8.5 SU all year
D10COil and grease, hexane extr methodDAILY MX <= 5 mg/L all year
D10CFlowDAILY MX report only (alert) all year
D10COil and grease visualDAILY MX <= 0 N=0;Y=1 all year
D13TurbidityDAILY MX report only (alert) all year
D13pHDAILY MN >= 6.5 SU all year
D13pHDAILY MX <= 8.5 SU all year
D13Oil and grease, hexane extr methodDAILY MX <= 5 mg/L all year
D13Turbidity, increase over backgroundDAILY MX <= 5 NTU all year
D13FlowDAILY MX report only (alert) all year
D13Turbidity, % increas over intakeDAILY MX <= 10 % all year
D13Oil and grease visualDAILY MX <= 0 N=0;Y=1 all year
L29TurbidityDAILY MX report only (alert) all year
L29pHDAILY MN >= 6.5 SU all year
L29pHDAILY MX <= 8.5 SU all year
L29Oil and grease, hexane extr methodDAILY MX <= 5 mg/L all year
L29Turbidity, increase over backgroundDAILY MX <= 5 NTU all year
L29FlowDAILY MX report only (alert) all year
L29Turbidity, % increas over intakeDAILY MX <= 10 % all year
L29Oil and grease visualDAILY MX <= 0 N=0;Y=1 all year
L29CTurbidityDAILY MX <= 5 NTU all year
L29CpHDAILY MN >= 6.5 SU all year
L29CpHDAILY MX <= 8.5 SU all year
L29COil and grease, hexane extr methodDAILY MX <= 5 mg/L all year
L29CpH, maximumDAILY MX <= 9 SU (alert) all year
L29CSolids, total dissolvedDAILY MX <= 500 mg/L (alert) all year
L29CFlowDAILY MX report only (alert) all year
L29COil and grease visualDAILY MX <= 0 N=0;Y=1 all year
M100TurbidityDAILY MX report only (alert) all year
M100pHDAILY MN >= 6.5 SU all year
M100pHDAILY MX <= 8.5 SU all year
M100Oil and grease, hexane extr methodDAILY MX <= 5 mg/L all year
M100Turbidity, increase over backgroundDAILY MX <= 5 NTU all year
M100FlowDAILY MX report only (alert) all year
M100Oil and grease visualDAILY MX <= 0 N=0;Y=1 all year
M200TurbidityDAILY MX report only (alert) all year
M200pHDAILY MN >= 6.5 SU all year
M200pHDAILY MX <= 8.5 SU all year
M200Oil and grease, hexane extr methodDAILY MX <= 5 mg/L all year
M200Turbidity, increase over backgroundDAILY MX <= 5 NTU all year
M200FlowDAILY MX report only (alert) all year
M200Oil and grease visualDAILY MX <= 0 N=0;Y=1 all year
S234TurbidityDAILY MX <= 25 NTU all year
S234pHDAILY MN >= 6.5 SU all year
S234pHDAILY MX <= 8.5 SU all year
S234Oil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
S234Nitrogen, ammonia total [as N]DAILY MX <= 14.7 mg/L all year
S234Nitrite + Nitrate total [as N]DAILY MX <= .68 mg/L all year
S234Copper, total [as Cu]DAILY MX <= 28.5 ug/L all year
S234Zinc, total [as Zn]DAILY MX <= 117 ug/L all year
S234FlowDAILY MX report only (alert) all year
S234Oil and grease visualDAILY MX <= 0 N=0;Y=1 all year
SD35TurbidityDAILY MX <= 25 NTU all year
SD35pHDAILY MN >= 6.5 SU all year
SD35pHDAILY MX <= 8.5 SU all year
SD35Oil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
SD35Nitrogen, ammonia total [as N]DAILY MX <= 14.7 mg/L all year
SD35Nitrite + Nitrate total [as N]DAILY MX <= .68 mg/L all year
SD35Copper, total [as Cu]DAILY MX <= 32.2 ug/L all year
SD35Zinc, total [as Zn]DAILY MX <= 117 ug/L all year
SD35FlowDAILY MX report only (alert) all year
SD35Oil and grease visualDAILY MX <= 0 N=0;Y=1 all year
SD3ATurbidityDAILY MX <= 25 NTU all year
SD3ApHDAILY MN >= 6.3 SU all year
SD3ApHDAILY MX <= 9 SU all year
SD3AOil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
SD3ANitrogen, ammonia total [as N]DAILY MX <= 14.7 mg/L all year
SD3ANitrite + Nitrate total [as N]DAILY MX <= .68 mg/L all year
SD3ACopper, total [as Cu]DAILY MX <= 59.2 ug/L all year
SD3AZinc, total [as Zn]DAILY MX <= 117 ug/L all year
SD3AFlowDAILY MX report only (alert) all year
SD3AOil and grease visualDAILY MX <= 0 N=0;Y=1 all year
SD67TurbidityDAILY MX <= 25 NTU all year
SD67pHDAILY MN >= 6.5 SU all year
SD67pHDAILY MX <= 8.5 SU all year
SD67Oil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
SD67Nitrogen, ammonia total [as N]DAILY MX <= 14.7 mg/L all year
SD67Nitrite + Nitrate total [as N]DAILY MX <= .68 mg/L all year
SD67Copper, total [as Cu]DAILY MX <= 32.2 ug/L all year
SD67Zinc, total [as Zn]DAILY MX <= 117 ug/L all year
SD67FlowDAILY MX report only (alert) all year
SD67Oil and grease visualDAILY MX <= 0 N=0;Y=1 all year
SDD6TurbidityDAILY MX <= 25 NTU all year
SDD6pHDAILY MN >= 6.5 SU all year
SDD6pHDAILY MX <= 8.5 SU all year
SDD6Oil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
SDD6Nitrogen, ammonia total [as N]DAILY MX <= 14.7 mg/L all year
SDD6Nitrite + Nitrate total [as N]DAILY MX <= .68 mg/L all year
SDD6Copper, total [as Cu]DAILY MX <= 25.6 ug/L all year
SDD6Zinc, total [as Zn]DAILY MX <= 117 ug/L all year
SDD6FlowDAILY MX report only (alert) all year
SDD6Oil and grease visualDAILY MX <= 0 N=0;Y=1 all year
SDE4TurbidityAVERAGE report only (alert) Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
SDE4TurbidityDAILY MX <= 25 NTU Jul, Aug, Sep
SDE4pHDAILY MN >= 6.5 SU Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
SDE4pHDAILY MN >= 6.5 SU Jul, Aug, Sep
SDE4pHDAILY MX <= 8.5 SU Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
SDE4pHDAILY MX <= 8.5 SU Jul, Aug, Sep
SDE4Oil and grease, hexane extr methodDAILY MX <= 15 mg/L Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
SDE4Oil and grease, hexane extr methodDAILY MX <= 15 mg/L Jul, Aug, Sep
SDE4Nitrogen, ammonia total [as N]DAILY MX <= 14.7 mg/L Jul, Aug, Sep
SDE4Nitrogen, ammonia total [as N]DAILY MX <= 14.7 mg/L Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
SDE4Nitrite + Nitrate total [as N]DAILY MX <= .68 mg/L Jul, Aug, Sep
SDE4Nitrite + Nitrate total [as N]DAILY MX <= .68 mg/L Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
SDE4Copper, total [as Cu]DAILY MX <= 25.6 ug/L Jul, Aug, Sep
SDE4Copper, total [as Cu]DAILY MX <= 25.6 ug/L Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
SDE4Zinc, total [as Zn]DAILY MX <= 117 ug/L Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
SDE4Zinc, total [as Zn]DAILY MX <= 117 ug/L Jul, Aug, Sep
SDE4FlowDAILY MX report only (alert) Jul, Aug, Sep
SDE4FlowDAILY MX report only (alert) Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
SDE4Oil and grease visualDAILY MX <= 0 N=0;Y=1 Jul, Aug, Sep
SDE4Oil and grease visualDAILY MX <= 0 N=0;Y=1 Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
SDN1TurbidityDAILY MX <= 25 NTU all year
SDN1pHDAILY MN >= 6.5 SU all year
SDN1pHDAILY MX <= 8.5 SU all year
SDN1Oil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
SDN1Nitrogen, ammonia total [as N]DAILY MX <= 14.7 mg/L all year
SDN1Nitrite + Nitrate total [as N]DAILY MX <= .68 mg/L all year
SDN1Copper, total [as Cu]DAILY MX <= 28.5 ug/L all year
SDN1Zinc, total [as Zn]DAILY MX <= 117 ug/L all year
SDN1FlowDAILY MX report only (alert) all year
SDN1Oil and grease visualDAILY MX <= 0 N=0;Y=1 all year
SDS4TurbidityDAILY MX <= 25 NTU all year
SDS4pHDAILY MN >= 6.5 SU all year
SDS4pHDAILY MX <= 8.5 SU all year
SDS4Oil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
SDS4Nitrogen, ammonia total [as N]DAILY MX <= 14.7 mg/L all year
SDS4Nitrite + Nitrate total [as N]DAILY MX <= .68 mg/L all year
SDS4Copper, total [as Cu]DAILY MX <= 32.2 ug/L all year
SDS4Zinc, total [as Zn]DAILY MX <= 71.4 ug/L all year
SDS4FlowDAILY MX report only (alert) all year
SDS4Oil and grease visualDAILY MX <= 0 N=0;Y=1 all year
SDW2TurbidityDAILY MX <= 25 NTU all year
SDW2pHDAILY MN >= 6.3 SU all year
SDW2pHDAILY MX <= 9 SU all year
SDW2Oil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
SDW2Nitrogen, ammonia total [as N]DAILY MX <= 14.7 mg/L all year
SDW2Nitrite + Nitrate total [as N]DAILY MX <= .68 mg/L all year
SDW2Copper, total [as Cu]DAILY MX <= 47.9 ug/L all year
SDW2Zinc, total [as Zn]DAILY MX <= 117 ug/L all year
SDW2FlowDAILY MX report only (alert) all year
SDW2Oil and grease visualDAILY MX <= 0 N=0;Y=1 all year
SW1ATurbidityDAILY MX <= 25 NTU all year
SW1ApHDAILY MN >= 6.3 SU all year
SW1ApHDAILY MX <= 9 SU all year
SW1AOil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
SW1ANitrogen, ammonia total [as N]DAILY MX <= 14.7 mg/L all year
SW1ANitrite + Nitrate total [as N]DAILY MX <= .68 mg/L all year
SW1ACopper, total [as Cu]DAILY MX <= 59.2 ug/L all year
SW1AZinc, total [as Zn]DAILY MX <= 117 ug/L all year
SW1AFlowDAILY MX report only (alert) all year
SW1AOil and grease visualDAILY MX <= 0 N=0;Y=1 all year
SW1BTurbidityDAILY MX <= 25 NTU all year
SW1BpHDAILY MN >= 6.3 SU all year
SW1BpHDAILY MX <= 9 SU all year
SW1BOil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
SW1BNitrogen, ammonia total [as N]DAILY MX <= 14.7 mg/L all year
SW1BNitrite + Nitrate total [as N]DAILY MX <= .68 mg/L all year
SW1BCopper, total [as Cu]DAILY MX <= 59.2 ug/L all year
SW1BZinc, total [as Zn]DAILY MX <= 117 ug/L all year
SW1BFlowDAILY MX report only (alert) all year
SW1BOil and grease visualDAILY MX <= 0 N=0;Y=1 all year
W200TurbidityDAILY MX report only (alert) all year
W200pHDAILY MN >= 6.5 SU all year
W200pHDAILY MX <= 8.5 SU all year
W200Oil and grease, hexane extr methodDAILY MX <= 5 mg/L all year
W200Turbidity, increase over backgroundDAILY MX <= 5 NTU all year
W200FlowDAILY MX report only (alert) all year
W200Oil and grease visualDAILY MX <= 0 N=0;Y=1 all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states