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Sewage treatment plant, major discharger, Chicopee, Massachusetts. NPDES permit MA0101508, in force until Jan 31, 2027. Last 12 months: over a limit 47 times (last September 2026), 15 required values missing, 2 of 254 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| October 2025 | 007 | E. coli, monthly average | 174 CFU/100mL | ≤ 126 CFU/100mL | 38% |
| October 2025 | 010 | Aluminum, total [as Al], monthly average | 173 ug/L | ≤ 87 ug/L | 99% |
| October 2025 | 010 | BOD, 5-day, 20 deg. C, monthly average | 4011 lb/d | ≤ 3878 lb/d | 3% |
| October 2025 | 010 | BOD, 5-day, 20 deg. C, monthly average | 86 mg/L | ≤ 30 mg/L | 187% |
| October 2025 | 010 | BOD, 5-day, 20 deg. C, weekly average | > 124 mg/L | ≤ 45 mg/L | — |
| October 2025 | 010 | BOD, 5-day, 20 deg. C, weekly average | > 5258 lb/d | ≤ 5817 lb/d | — |
| October 2025 | 010 | Solids, total suspended, monthly average | 36 mg/L | ≤ 30 mg/L | 20% |
| November 2025 | 010 | Aluminum, total [as Al], monthly average | 168 ug/L | ≤ 87 ug/L | 93% |
| November 2025 | 010 | BOD, 5-day, 20 deg. C, monthly average | 44 mg/L | ≤ 30 mg/L | 47% |
| November 2025 | 010 | BOD, 5-day, 20 deg. C, weekly average | 55 mg/L | ≤ 45 mg/L | 22% |
| November 2025 | 010 | LC50 Static 48Hr Acute Pimephales promelas, monthly average minimum | 43.5 % | ≥ 100 % | 57% |
| November 2025 | 010 | Solids, total suspended, monthly average | 37 mg/L | ≤ 30 mg/L | 23% |
| December 2025 | 010 | Aluminum, total [as Al], monthly average | 148.6 ug/L | ≤ 87 ug/L | 71% |
| December 2025 | 010 | BOD, 5-day, 20 deg. C, monthly average | 55 mg/L | ≤ 30 mg/L | 83% |
| December 2025 | 010 | BOD, 5-day, 20 deg. C, weekly average | 73.7 mg/L | ≤ 45 mg/L | 64% |
| December 2025 | 010 | Solids, total suspended, monthly average | 37 mg/L | ≤ 30 mg/L | 23% |
| December 2025 | 010 | Solids, total suspended, weekly average | 48.1 mg/L | ≤ 45 mg/L | 7% |
| January 2026 | 010 | BOD, 5-day, 20 deg. C, monthly average | 44 mg/L | ≤ 30 mg/L | 47% |
| January 2026 | 010 | BOD, 5-day, 20 deg. C, weekly average | 62.3 mg/L | ≤ 45 mg/L | 38% |
| February 2026 | 010 | Aluminum, total [as Al], monthly average | 90.22 ug/L | ≤ 87 ug/L | 4% |
| February 2026 | 010 | LC50 Static 48Hr Acute Pimephales promelas, monthly average minimum | 93.8 % | ≥ 100 % | 6% |
| April 2026 | 010 | Aluminum, total [as Al], monthly average | 102 ug/L | ≤ 87 ug/L | 17% |
| April 2026 | 010 | BOD, 5-day, 20 deg. C, monthly average | 44 mg/L | ≤ 30 mg/L | 47% |
| April 2026 | 010 | BOD, 5-day, 20 deg. C, weekly average | 56.8 mg/L | ≤ 45 mg/L | 26% |
| May 2026 | 010 | Aluminum, total [as Al], monthly average | 105.67 ug/L | ≤ 87 ug/L | 21% |
| May 2026 | 010 | BOD, 5-day, 20 deg. C, monthly average | 43 mg/L | ≤ 30 mg/L | 43% |
| May 2026 | 010 | BOD, 5-day, 20 deg. C, weekly average | 55.2 mg/L | ≤ 45 mg/L | 23% |
| June 2026 | 010 | Aluminum, total [as Al], monthly average | 110 ug/L | ≤ 87 ug/L | 26% |
| June 2026 | 010 | BOD, 5-day, 20 deg. C, monthly average | 49 mg/L | ≤ 30 mg/L | 63% |
| June 2026 | 010 | BOD, 5-day, 20 deg. C, weekly average | 58.4 mg/L | ≤ 45 mg/L | 30% |
| June 2026 | 010 | Chlorine, total residual, daily maximum | 1.44 mg/L | ≤ 1 mg/L | 44% |
| June 2026 | 010 | E. coli, daily maximum | 800 CFU/100mL | ≤ 409 CFU/100mL | 96% |
| June 2026 | 010 | Solids, total suspended, monthly average | 36 mg/L | ≤ 30 mg/L | 20% |
| June 2026 | 010 | Solids, total suspended, weekly average | 45.7 mg/L | ≤ 45 mg/L | 2% |
| July 2026 | 010 | Aluminum, total [as Al], monthly average | 100 ug/L | ≤ 87 ug/L | 15% |
| July 2026 | 010 | BOD, 5-day, 20 deg. C, monthly average | 38.66 mg/L | ≤ 30 mg/L | 29% |
| July 2026 | 010 | BOD, 5-day, 20 deg. C, weekly average | 45.17 mg/L | ≤ 45 mg/L | 0% |
| July 2026 | 010 | Chlorine, total residual, daily maximum | 1.19 mg/L | ≤ 1 mg/L | 19% |
| August 2026 | 007 | E. coli, daily maximum | > 457 CFU/100mL | ≤ 409 CFU/100mL | — |
| August 2026 | 007 | E. coli, monthly average | > 457 CFU/100mL | ≤ 126 CFU/100mL | — |
| August 2026 | 010 | Aluminum, total [as Al], monthly average | 99 ug/L | ≤ 87 ug/L | 14% |
| August 2026 | 010 | BOD, 5-day, 20 deg. C, monthly average | 39.81 mg/L | ≤ 30 mg/L | 33% |
| August 2026 | 010 | BOD, 5-day, 20 deg. C, weekly average | 56 mg/L | ≤ 45 mg/L | 24% |
| August 2026 | 010 | Chlorine, total residual, daily maximum | 1.36 mg/L | ≤ 1 mg/L | 36% |
| September 2026 | 010 | Aluminum, total [as Al], monthly average | 233.8 ug/L | ≤ 87 ug/L | 169% |
| September 2026 | 010 | BOD, 5-day, 20 deg. C, monthly average | 53.25 mg/L | ≤ 30 mg/L | 78% |
| September 2026 | 010 | BOD, 5-day, 20 deg. C, weekly average | 63.75 mg/L | ≤ 45 mg/L | 42% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Number of Events | monthly total | report only (#) | all year | 003 |
| Duration of discharge | monthly total | report only (hr/mo) | all year | 003 |
| Flow, total | monthly total | report only (gal/mo) | all year | 003 |
| Number of Events | monthly total | report only (#) | all year | 004 |
| Duration of discharge | monthly total | report only (hr/mo) | all year | 004 |
| Flow, total | monthly total | report only (gal/mo) | all year | 004 |
| Number of Events | monthly total | report only (#) | all year | 005 |
| Duration of discharge | monthly total | report only (hr/mo) | all year | 005 |
| Flow, total | monthly total | report only (gal/mo) | all year | 005 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | Apr, Sep | 007 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | Apr, Sep | 007 |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) | Apr, Sep | 007 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | Apr, Sep | 007 |
| pH | minimum | report only (SU) | all year | 007 |
| pH | maximum | report only (SU) | all year | 007 |
| Solids, total suspended | monthly average | report only (mg/L) | Apr, Sep | 007 |
| Solids, total suspended | daily maximum | report only (mg/L) | Apr, Sep | 007 |
| Solids, total suspended | monthly average | report only (lb/d) | Apr, Sep | 007 |
| Solids, total suspended | daily maximum | report only (lb/d) | Apr, Sep | 007 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | Apr–Sep | 007 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | Apr–Sep | 007 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Apr–Sep | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Apr–Sep | 007 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | Apr–Sep | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Apr–Sep | 007 |
| Nitrogen, nitrite total [as N] | monthly average | report only (mg/L) | Apr–Sep | 007 |
| Nitrogen, nitrite total [as N] | monthly average | report only (lb/d) | Apr–Sep | 007 |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | Apr–Sep | 007 |
| Nitrogen, nitrate total [as N] | monthly average | report only (lb/d) | Apr–Sep | 007 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Apr–Sep | 007 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (lb/d) | Apr–Sep | 007 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | Apr–Sep | 007 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | Apr–Sep | 007 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | Apr–Sep | 007 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | Apr–Sep | 007 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | Apr–Sep | 007 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | Apr–Sep | 007 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | Apr–Sep | 007 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | Apr–Sep | 007 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | Apr–Sep | 007 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | Apr–Sep | 007 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | Apr–Sep | 007 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | Apr–Sep | 007 |
| Aluminum, total [as Al] | daily maximum | report only (mg/L) | Apr–Sep | 007 |
| Aluminum, total [as Al] | daily maximum | report only (mg/L) | Apr–Sep | 007 |
| Chlorine, total residual | monthly average | ≤ .89 mg/L | all year | 007 |
| Chlorine, total residual | daily maximum | ≤ 1 mg/L | all year | 007 |
| E. coli | monthly average | ≤ 126 CFU/100mL | all year | 007 |
| E. coli | daily maximum | ≤ 409 CFU/100mL | all year | 007 |
| Number of Events | total | report only (#) | all year | 007 |
| Number of Events | total | report only (#) | all year | 007 |
| Duration of discharge | total | report only (hr) | all year | 007 |
| Duration of discharge | total | report only (hr) | all year | 007 |
| Flow, total | total | report only (MGD) | all year | 007 |
| Flow, total | total | report only (MGD) | all year | 007 |
| Flow, total | maximum | report only (MGD) | all year | 007 |
| Flow, total | maximum | report only (MGD) | all year | 007 |
| LC50 Static 48Hr Acute Pimephales promelas | minimum | ≥ 100 % | Apr–Sep | 007 |
| Number of Events | monthly total | report only (#) | all year | 008 |
| Duration of discharge | monthly total | report only (hr/mo) | all year | 008 |
| Flow, total | monthly total | report only (gal/mo) | all year | 008 |
| Number of Events | monthly total | report only (#) | all year | 009 |
| Duration of discharge | monthly total | report only (hr/mo) | all year | 009 |
| Flow, total | monthly total | report only (gal/mo) | all year | 009 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 010 |
| Flow rate | total | report only (gal/min) | all year | 010 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 010 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 010 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 010 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 3878 lb/d | all year | 010 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 5817 lb/d | all year | 010 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 010 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 010 |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) | all year | 010 |
| BOD, 5-day, 20 deg. C | weekly average | report only (lb/d) | all year | 010 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 010 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 010 |
| pH | minimum | ≥ 6 SU | all year | 010 |
| pH | maximum | ≤ 8.3 SU | all year | 010 |
| pH | minimum | report only (SU) | all year | 010 |
| pH | EPA's "MAX BDL" | report only (SU) | all year | 010 |
| pH | maximum | report only (SU) | all year | 010 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 010 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 010 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 010 |
| Solids, total suspended | monthly average | ≤ 3878 lb/d | all year | 010 |
| Solids, total suspended | weekly average | ≤ 5817 lb/d | all year | 010 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 010 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 010 |
| Solids, total suspended | monthly average | report only (lb/d) | all year | 010 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 010 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 010 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 010 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 010 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 010 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 010 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 010 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 010 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 010 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 010 |
| Nitrogen, total [as N] | rolling average | ≤ 647 lb/d | all year | 010 |
| Nitrogen, total [as N] | rolling average | report only (lb/d) | all year | 010 |
| Ammonia nitrogen, total, [as N] 30 day | daily maximum | report only (mg/L) | all year | 010 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 010 |
| Nitrogen, ammonia total [as N] | weekly average | report only (mg/L) | all year | 010 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 010 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 010 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | all year | 010 |
| Nitrogen, ammonia total [as N] | weekly average | report only (lb/d) | all year | 010 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 010 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 010 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 010 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 010 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Apr–Oct | 010 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Apr–Oct | 010 |
| Carbon, tot organic [TOC] | daily maximum | report only (mg/L) | all year | 010 |
| Carbon, tot organic [TOC] | daily maximum | report only (mg/L) | all year | 010 |
| Carbon, dissolved organic [as C] | daily maximum | report only (mg/L) | all year | 010 |
| Carbon, dissolved organic [as C] | daily maximum | report only (mg/L) | all year | 010 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 010 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 010 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 010 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 010 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 010 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 010 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 010 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 010 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 010 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 010 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 010 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 010 |
| Aluminum, total [as Al] | monthly average | ≤ 87 ug/L | all year | 010 |
| Aluminum, total [as Al] | daily maximum | report only (ug/L) | all year | 010 |
| Aluminum, total [as Al] | daily maximum | report only (mg/L) | all year | 010 |
| Aluminum, total [as Al] | daily maximum | report only (mg/L) | all year | 010 |
| Rainfall | total | report only (in) | all year | 010 |
| Duration | total | report only (hr) | all year | 010 |
| Duration | total | report only (hr) | all year | 010 |
| Flow, in conduit or thru treatment plant | total | report only (gal/d) | all year | 010 |
| Flow, in conduit or thru treatment plant | rolling average | ≤ 15.5 MGD | all year | 010 |
| Flow, in conduit or thru treatment plant | total | report only (gal/d) | all year | 010 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 010 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 010 |
| Chlorine, total residual | monthly average | ≤ .89 mg/L | all year | 010 |
| Chlorine, total residual | daily maximum | ≤ 1 mg/L | all year | 010 |
| Chlorine, total residual | monthly average | report only (mg/L) | all year | 010 |
| Chlorine, total residual | daily maximum | report only (mg/L) | all year | 010 |
| E. coli | monthly geometric mean | ≤ 126 CFU/100mL | Apr–Oct | 010 |
| E. coli | monthly geometric mean | report only (CFU/100mL) | Apr–Oct | 010 |
| E. coli | daily maximum | ≤ 409 CFU/100mL | Apr–Oct | 010 |
| E. coli | daily maximum | report only (CFU/100mL) | Apr–Oct | 010 |
| Number of Events | total | report only (#) | all year | 010 |
| LC50 Static 48Hr Acute Pimephales promelas | monthly average minimum | ≥ 100 % | all year | 010 |
| Number of Events | monthly total | report only (#) | all year | 024 |
| Duration of discharge | monthly total | report only (hr/mo) | all year | 024 |
| Flow, total | monthly total | report only (gal/mo) | all year | 024 |
| Number of Events | monthly total | report only (#) | all year | 026 |
| Duration of discharge | monthly total | report only (hr/mo) | all year | 026 |
| Flow, total | monthly total | report only (gal/mo) | all year | 026 |
| Number of Events | monthly total | report only (#) | all year | 027 |
| Duration of discharge | monthly total | report only (hr/mo) | all year | 027 |
| Flow, total | monthly total | report only (gal/mo) | all year | 027 |
| Number of Events | monthly total | report only (#) | all year | 034 |
| Duration of discharge | monthly total | report only (hr/mo) | all year | 034 |
| Flow, total | monthly total | report only (gal/mo) | all year | 034 |
| Number of Events | monthly total | report only (#) | all year | 037 |
| Duration of discharge | monthly total | report only (hr/mo) | all year | 037 |
| Flow, total | monthly total | report only (gal/mo) | all year | 037 |
| Number of Events | monthly total | report only (#) | all year | 040 |
| Duration of discharge | monthly total | report only (hr/mo) | all year | 040 |
| Flow, total | monthly total | report only (gal/mo) | all year | 040 |
| Number of Events | monthly total | report only (#) | all year | 042 |
| Duration of discharge | monthly total | report only (hr/mo) | all year | 042 |
| Flow, total | monthly total | report only (gal/mo) | all year | 042 |
| Number of Events | monthly total | report only (#) | all year | 32A |
| Duration of discharge | monthly total | report only (hr/mo) | all year | 32A |
| Flow, total | monthly total | report only (gal/mo) | all year | 32A |
| Number of Events | monthly total | report only (#) | all year | 32B |
| Duration of discharge | monthly total | report only (hr/mo) | all year | 32B |
| Flow, total | monthly total | report only (gal/mo) | all year | 32B |
| Perfluorooctanoic acid (PFOA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorooctanoic acid (PFOA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorooctanoic acid (PFOA) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluorooctanesulfonate | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorooctanesulfonate | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluoroheptanoic acid (PFHpA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluoroheptanoic acid (PFHpA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluoroheptanoic acid (PFHpA) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluorononanoic acid (PFNA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorodecanoic acid (PFDA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorodecanoic acid (PFDA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorodecanoic acid (PFDA) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluorohexanesulfonic acid (PFHxS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorohexanesulfonic acid (PFHxS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorohexanesulfonic acid (PFHxS) | daily maximum | report only (ng/g) | all year | PFAS |
| Perfluorooctanesulfonic acid (PFOS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorooctanesulfonic acid (PFOS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorooctanesulfonic acid (PFOS) | daily maximum | report only (ng/g) | all year | PFAS |
Cited limits by parameter: Massachusetts's rules and the federal ones.
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