Passage Data · Check a report · Use it from your AI
Sewage treatment plant, major discharger, Boston, Massachusetts. NPDES permit MA0103284 expired Jul 31, 2005; its limits still apply. Last 12 months: over a limit once (last December 2025). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia), daily minimum | 2 % | ≥ 50 % | 96% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | monthly average minimum | report only (mg/L) | all year | C01 |
| BOD, 5-day, 20 deg. C | maximum | report only (mg/L) | all year | C01 |
| pH | minimum | ≥ 6.5 SU | all year | C01 |
| pH | maximum | ≤ 8.3 SU | all year | C01 |
| Solids, total suspended | monthly average minimum | report only (mg/L) | all year | C01 |
| Solids, total suspended | maximum | report only (mg/L) | all year | C01 |
| Rainfall | monthly total | report only (in) | all year | C01 |
| Rainfall | maximum | report only (in) | all year | C01 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | C01 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | C01 |
| Chlorine, total residual | monthly average minimum | ≥ .1 mg/L | all year | C01 |
| Chlorine, total residual | statistic code MR | ≤ .25 mg/L | all year | C01 |
| Coliform, fecal general | monthly average minimum | report only (#/100mL) | all year | C01 |
| Coliform, fecal general | maximum | report only (#/100mL) | all year | C01 |
| Bypass valve | event total | report only (occur/mo) | all year | C01 |
| Duration of discharge | maximum | report only (hr) | all year | C01 |
| Duration of discharge | maximum | report only (hr/d) | all year | C01 |
| LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | daily minimum | report only (%) | all year | C01 |
| LC50 Static 48Hr Acute Menidia | daily minimum | report only (%) | all year | C01 |
| LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | minimum | report only (pass=0;fail=1) | all year | C01 |
| LC50 Pass/Fail Static 24Hr Acute Menidia menidia | minimum | report only (pass=0;fail=1) | all year | C01 |
| BOD, 5-day, 20 deg. C | monthly average minimum | report only (mg/L) | all year | C03 |
| BOD, 5-day, 20 deg. C | maximum | report only (mg/L) | all year | C03 |
| pH | minimum | ≥ 6.5 SU | all year | C03 |
| pH | maximum | ≤ 8.5 SU | all year | C03 |
| Solids, total suspended | monthly average minimum | report only (mg/L) | all year | C03 |
| Solids, total suspended | maximum | report only (mg/L) | all year | C03 |
| Rainfall | monthly total | report only (in) | all year | C03 |
| Rainfall | maximum | report only (in) | all year | C03 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | C03 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | C03 |
| Chlorine, total residual | average | ≤ .1 mg/L | all year | C03 |
| Chlorine, total residual | statistic code MR | ≤ .25 mg/L | all year | C03 |
| Coliform, fecal general | monthly average minimum | report only (#/100mL) | all year | C03 |
| Coliform, fecal general | maximum | report only (#/100mL) | all year | C03 |
| Bypass valve | event total | report only (occur/mo) | all year | C03 |
| Duration of discharge | maximum | report only (hr) | all year | C03 |
| Duration of discharge | maximum | report only (hr/d) | all year | C03 |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | daily minimum | report only (%) | all year | C03 |
| LC50 Static 48Hr Acute D. Pulex | daily minimum | report only (%) | all year | C03 |
| LC50 Pass/Fail Static 24Hr Acute Ceriodaphnia | minimum | report only (pass=0;fail=1) | all year | C03 |
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | daily minimum | report only (pass=0;fail=1) | all year | C03 |
| BOD, 5-day, 20 deg. C | monthly average minimum | report only (mg/L) | all year | C05 |
| BOD, 5-day, 20 deg. C | maximum | report only (mg/L) | all year | C05 |
| pH | minimum | ≥ 6.5 SU | all year | C05 |
| pH | maximum | ≤ 8.5 SU | all year | C05 |
| Solids, total suspended | monthly average minimum | report only (mg/L) | all year | C05 |
| Solids, total suspended | maximum | report only (mg/L) | all year | C05 |
| Rainfall | monthly total | report only (in) | all year | C05 |
| Rainfall | maximum | report only (in) | all year | C05 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | C05 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | C05 |
| Chlorine, total residual | average | ≤ .1 mg/L | all year | C05 |
| Chlorine, total residual | statistic code MR | ≤ .25 mg/L | all year | C05 |
| Coliform, fecal general | monthly average minimum | report only (#/100mL) | all year | C05 |
| Coliform, fecal general | maximum | report only (#/100mL) | all year | C05 |
| Bypass valve | event total | report only (occur/mo) | all year | C05 |
| Duration of discharge | maximum | report only (hr) | all year | C05 |
| Duration of discharge | maximum | report only (hr/d) | all year | C05 |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | daily minimum | report only (%) | all year | C05 |
| LC50 Static 48Hr Acute D. Pulex | daily minimum | report only (%) | all year | C05 |
| LC50 Pass/Fail Static 24Hr Acute Ceriodaphnia | minimum | report only (pass=0;fail=1) | all year | C05 |
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | daily minimum | report only (pass=0;fail=1) | all year | C05 |
| BOD, 5-day, 20 deg. C | monthly average minimum | report only (mg/L) | all year | C25 |
| BOD, 5-day, 20 deg. C | maximum | report only (mg/L) | all year | C25 |
| pH | minimum | ≥ 6.5 SU | all year | C25 |
| pH | maximum | ≤ 8.3 SU | all year | C25 |
| Solids, total suspended | monthly average minimum | report only (mg/L) | all year | C25 |
| Solids, total suspended | maximum | report only (mg/L) | all year | C25 |
| Rainfall | monthly total | report only (in) | all year | C25 |
| Rainfall | maximum | report only (in) | all year | C25 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | C25 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | C25 |
| Chlorine, total residual | monthly average minimum | ≥ .1 mg/L | all year | C25 |
| Chlorine, total residual | statistic code MR | ≤ .25 mg/L | all year | C25 |
| Coliform, fecal general | monthly average minimum | report only (#/100mL) | all year | C25 |
| Coliform, fecal general | maximum | report only (#/100mL) | all year | C25 |
| Bypass valve | event total | report only (occur/mo) | all year | C25 |
| Duration of discharge | maximum | report only (hr) | all year | C25 |
| Duration of discharge | maximum | report only (hr/d) | all year | C25 |
| LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | daily minimum | report only (%) | all year | C25 |
| LC50 Static 48Hr Acute Menidia | daily minimum | report only (%) | all year | C25 |
| LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | minimum | report only (pass=0;fail=1) | all year | C25 |
| LC50 Pass/Fail Static 24Hr Acute Menidia menidia | minimum | report only (pass=0;fail=1) | all year | C25 |
| pH | minimum | ≥ 6 SU | all year | T01 |
| pH | maximum | ≤ 9 SU | all year | T01 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | T01 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | T01 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | T01 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | T01 |
| Solids, total suspended | weekly average | report only (mg/L) | all year | T01 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | T01 |
| Solids, settleable | weekly average | report only (mL/L) | all year | T01 |
| Solids, settleable | daily maximum | report only (mL/L) | all year | T01 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | T01 |
| Nitrogen, nitrite total [as N] | monthly average | report only (mg/L) | all year | T01 |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | all year | T01 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | T01 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | T01 |
| Arsenic, total [as As] | monthly average | report only (ug/L) | all year | T01 |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year | T01 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | T01 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | T01 |
| Coliform, fecal - % samples exceeding limit | maximum | ≤ 10 % | all year | T01 |
| PCB-1016 | monthly average | ≤ .000045 ug/L | all year | T01 |
| PCB-1016 | daily maximum | report only (ug/L) | all year | T01 |
| 4,4'-DDT | monthly average | report only (ug/L) | all year | T01 |
| 4,4'-DDT | daily maximum | report only (ug/L) | all year | T01 |
| Aldrin | monthly average | report only (ug/L) | all year | T01 |
| Aldrin | daily maximum | report only (ug/L) | all year | T01 |
| Chlordane, .alpha.-, whole water | monthly average | report only (ug/L) | all year | T01 |
| Chlordane, .alpha.-, whole water | daily maximum | report only (ug/L) | all year | T01 |
| Chlordane [tech mix. and metabolites] | monthly average | report only (ug/L) | all year | T01 |
| Chlordane [tech mix. and metabolites] | daily maximum | report only (ug/L) | all year | T01 |
| Dieldrin | monthly average | report only (ug/L) | all year | T01 |
| Dieldrin | daily maximum | report only (ug/L) | all year | T01 |
| Heptachlor | monthly average | report only (ug/L) | all year | T01 |
| Heptachlor | daily maximum | report only (ug/L) | all year | T01 |
| Heptachlor epoxide | monthly average | report only (ug/L) | all year | T01 |
| Heptachlor epoxide | daily maximum | report only (ug/L) | all year | T01 |
| PCB-1221 | monthly average | ≤ .000045 ug/L | all year | T01 |
| PCB-1221 | daily maximum | report only (ug/L) | all year | T01 |
| PCB-1232 | monthly average | ≤ .000045 ug/L | all year | T01 |
| PCB-1232 | daily maximum | report only (ug/L) | all year | T01 |
| PCB-1242 | monthly average | ≤ .000045 ug/L | all year | T01 |
| PCB-1242 | daily maximum | report only (ug/L) | all year | T01 |
| PCB-1248 | monthly average | ≤ .000045 ug/L | all year | T01 |
| PCB-1248 | daily maximum | report only (ug/L) | all year | T01 |
| PCB-1254 | monthly average | ≤ .000045 ug/L | all year | T01 |
| PCB-1254 | daily maximum | report only (ug/L) | all year | T01 |
| PCB-1260 | monthly average | ≤ .000045 ug/L | all year | T01 |
| PCB-1260 | daily maximum | report only (ug/L) | all year | T01 |
| Polychlorinated biphenyls [PCBs] | monthly average | report only (ug/L) | all year | T01 |
| Polychlorinated biphenyls [PCBs] | daily maximum | report only (ug/L) | all year | T01 |
| Hexachlorobenzene | monthly average | report only (ug/L) | all year | T01 |
| Hexachlorobenzene | daily maximum | report only (ug/L) | all year | T01 |
| .gamma.-Chlordane, whole water | monthly average | report only (ug/L) | all year | T01 |
| .gamma.-Chlordane, whole water | daily maximum | report only (ug/L) | all year | T01 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | T01 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | T01 |
| Chlorine, total residual | monthly average | ≤ 456 ug/L | all year | T01 |
| Chlorine, total residual | daily maximum | ≤ 631 ug/L | all year | T01 |
| Mercury, total [as Hg] | monthly average | report only (ug/L) | all year | T01 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | T01 |
| Coliform, fecal general | weekly geometric mean | ≤ 14000 #/100mL | all year | T01 |
| Coliform, fecal general | daily maximum | ≤ 14000 #/100mL | all year | T01 |
| Coliform, fecal general | monthly geometric mean | ≤ 200 #/100mL | all year | T01 |
| Coliform, fecal general | median | ≤ 200 #/100mL | all year | T01 |
| Coliform, fecal general | daily maximum | ≤ 400 #/100mL | all year | T01 |
| Cyanide, total recoverable | monthly average | report only (ug/L) | all year | T01 |
| Cyanide, total recoverable | daily maximum | report only (ug/L) | all year | T01 |
| Volatile fraction organics [EPA 624] | monthly average | report only (ug/L) | all year | T01 |
| Volatile fraction organics [EPA 624] | daily maximum | report only (ug/L) | all year | T01 |
| CBOD5+NH3-N | monthly average | ≤ 25 mg/L | all year | T01 |
| CBOD5+NH3-N | weekly average | ≤ 40 mg/L | all year | T01 |
| CBOD5+NH3-N | daily maximum | report only (mg/L) | all year | T01 |
| CBOD5+NH3-N | monthly average | report only (mg/L) | all year | T01 |
| CBOD5+NH3-N | weekly average | report only (mg/L) | all year | T01 |
| CBOD5+NH3-N | daily maximum | report only (mg/L) | all year | T01 |
| Flow, total | annual average | ≤ 436 MGD | all year | T01 |
| Flow, total | monthly average | report only (MGD) | all year | T01 |
| LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | daily minimum | ≥ 50 % | all year | T01 |
| LC50 Static 48Hr Acute Menidia | daily minimum | ≥ 50 % | all year | T01 |
| NOEL Static 1Hr 20min Fert. Chronic Arbacia punctulata | daily minimum | ≥ 1.5 % | all year | T01 |
| Noael Statre 7Day Chronic Menidia | daily minimum | ≥ 1.5 % | all year | T01 |
Cited limits by parameter: Massachusetts's rules and the federal ones.
· Save this facility as a site · Superfund sites nearby · Your permits on one board
On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/MA0103284 · MCP: https://passage-data.com/mcp