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Commercial Physical Research, New Kensington, Pennsylvania. NPDES permit PA0000469, in force until Aug 31, 2029. Last 12 months: no values over a limit, 50 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | all year | 004 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 004 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 004 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 004 |
| Solids, total suspended | instantaneous maximum | ≤ 60 mg/L | all year | 004 |
| Solids, total suspended | monthly average | ≤ 18.8 lb/d | all year | 004 |
| Solids, total suspended | daily maximum | report only (lb/d) | all year | 004 |
| Nitrogen, total [as N] | instantaneous maximum | report only (mg/L) | all year | 004 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.57 mg/L | May–Oct | 004 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.75 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 004 |
| Nitrogen, ammonia total [as N] | instantaneous maximum | ≤ 3.14 mg/L | May–Oct | 004 |
| Nitrogen, ammonia total [as N] | instantaneous maximum | ≤ 5.5 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 004 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .98 lb/d | May–Oct | 004 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.72 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | May–Oct | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec | 004 |
| Phosphorus, total [as P] | instantaneous maximum | report only (mg/L) | all year | 004 |
| Iron, total [as Fe] | semi-annual average | ≤ 1.5 mg/L | all year | 004 |
| Iron, total [as Fe] | daily maximum | ≤ 3 mg/L | all year | 004 |
| Iron, total [as Fe] | semi-annual average | ≤ .94 lb/d | all year | 004 |
| Iron, total [as Fe] | daily maximum | report only (lb/d) | all year | 004 |
| Manganese, total [as Mn] | semi-annual average | ≤ 1 mg/L | all year | 004 |
| Manganese, total [as Mn] | daily maximum | ≤ 2 mg/L | all year | 004 |
| Manganese, total [as Mn] | semi-annual average | ≤ .63 lb/d | all year | 004 |
| Manganese, total [as Mn] | daily maximum | report only (lb/d) | all year | 004 |
| Aluminum, total [as Al] | semi-annual average | ≤ .75 mg/L | all year | 004 |
| Aluminum, total [as Al] | daily maximum | ≤ .75 mg/L | all year | 004 |
| Aluminum, total [as Al] | semi-annual average | ≤ .47 lb/d | all year | 004 |
| Aluminum, total [as Al] | daily maximum | report only (lb/d) | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | ≤ .075 MGD | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Chlorine, total residual | monthly average | ≤ .018 mg/L | all year | 004 |
| Chlorine, total residual | instantaneous maximum | ≤ .06 mg/L | all year | 004 |
| Chlorine, total residual | monthly average | ≤ .011 lb/d | all year | 004 |
| Chlorine, total residual | daily maximum | report only (lb/d) | all year | 004 |
| E. coli | instantaneous maximum | report only (#/100mL) | all year | 004 |
| Ultraviolet light transmittance | instantaneous minimum | report only (%) | all year | 004 |
| Ultraviolet light transmittance | monthly average | report only (%) | all year | 004 |
| Coliform, fecal general | geometric mean | ≤ 2000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 004 |
| Coliform, fecal general | geometric mean | ≤ 200 #/100mL | May–Sep | 004 |
| Coliform, fecal general | instantaneous maximum | ≤ 10000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 004 |
| Coliform, fecal general | instantaneous maximum | ≤ 1000 #/100mL | May–Sep | 004 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | instantaneous maximum | ≤ 50 mg/L | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 15.6 lb/d | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (lb/d) | all year | 004 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 005 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 005 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 005 |
| Solids, total suspended | monthly average | ≤ 19.5 mg/L | all year | 005 |
| Solids, total suspended | daily maximum | ≤ 41 mg/L | all year | 005 |
| Oil & Grease | monthly average | ≤ 12 mg/L | all year | 005 |
| Oil & Grease | daily maximum | ≤ 20 mg/L | all year | 005 |
| Chromium, hexavalent [as Cr] | monthly average | ≤ .01 mg/L | all year | 005 |
| Chromium, hexavalent [as Cr] | daily maximum | ≤ .02 mg/L | all year | 005 |
| Copper, total [as Cu] | monthly average | ≤ .039 mg/L | all year | 005 |
| Copper, total [as Cu] | daily maximum | ≤ .06 mg/L | all year | 005 |
| Iron, total [as Fe] | semi-annual average | ≤ 1.5 mg/L | all year | 005 |
| Iron, total [as Fe] | daily maximum | ≤ 3 mg/L | all year | 005 |
| Lead, total [as Pb] | monthly average | ≤ .022 mg/L | all year | 005 |
| Lead, total [as Pb] | daily maximum | ≤ .044 mg/L | all year | 005 |
| Manganese, total [as Mn] | semi-annual average | ≤ 1 mg/L | all year | 005 |
| Manganese, total [as Mn] | daily maximum | ≤ 2 mg/L | all year | 005 |
| Nickel, total [as Ni] | monthly average | ≤ .6 mg/L | all year | 005 |
| Nickel, total [as Ni] | daily maximum | ≤ 1.2 mg/L | all year | 005 |
| Zinc, total [as Zn] | monthly average | ≤ .17 mg/L | all year | 005 |
| Zinc, total [as Zn] | daily maximum | ≤ .34 mg/L | all year | 005 |
| Aluminum, total [as Al] | monthly average | ≤ .5 mg/L | all year | 005 |
| Aluminum, total [as Al] | daily maximum | ≤ 1 mg/L | all year | 005 |
| Selenium, total [as Se] | monthly average | ≤ .005 mg/L | all year | 005 |
| Selenium, total [as Se] | daily maximum | ≤ .008 mg/L | all year | 005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| Perfluorooctanoic acid (PFOA) | daily maximum | report only (ng/L) | all year | 005 |
| Perfluorooctanesulfonate | daily maximum | report only (ng/L) | all year | 005 |
| Perfluorobutanesulfonic acid (PFBS) | daily maximum | report only (ng/L) | all year | 005 |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) | daily maximum | report only (ng/L) | all year | 005 |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit, daily maximum | 66.7 deg F (Oct) | new | — | — |
| Temperature, water deg. fahrenheit, daily maximum | 50.6 deg F (Nov) | new | — | — |
| Temperature, water deg. fahrenheit, daily maximum | 42.6 deg F (Dec) | new | — | — |
| Temperature, water deg. fahrenheit, daily maximum | 40.8 deg F (Jan) | new | — | — |
| Temperature, water deg. fahrenheit, daily maximum | 40.8 deg F (Feb) | new | — | — |
| Temperature, water deg. fahrenheit, daily maximum | 48 deg F (Mar) | new | — | — |
| Temperature, water deg. fahrenheit, daily maximum | 87.9 deg F (Aug) | new | — | — |
Cited limits by parameter: Pennsylvania's rules and the federal ones.
Same industry: the 7 Engineering, Accounting, Research and Management Services permits in Pennsylvania.
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On EPA ECHO: Facility report · DMR history
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