Guilford-Sangerville Sanitary District — NPDES permit ME0102032: limits, due date and EPA's record

Sewage treatment plant, major discharger, Guilford, Maine. NPDES permit ME0102032 expired Sep 30, 2020; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Limits in force (195)

Parameter	Statistic	Limit	Months	Outfall
BOD, 5-day, 20 deg. C	monthly average	≤ 66 mg/L	all year	001
BOD, 5-day, 20 deg. C	monthly average	≤ 33 mg/L	all year	001
BOD, 5-day, 20 deg. C	monthly average	≤ 39 mg/L	all year	001
BOD, 5-day, 20 deg. C	monthly average	≤ 79 mg/L	all year	001
BOD, 5-day, 20 deg. C	daily maximum	≤ 123 mg/L	all year	001
BOD, 5-day, 20 deg. C	daily maximum	≤ 62 mg/L	all year	001
BOD, 5-day, 20 deg. C	daily maximum	≤ 75 mg/L	all year	001
BOD, 5-day, 20 deg. C	daily maximum	≤ 150 mg/L	all year	001
BOD, 5-day, 20 deg. C	monthly average	≤ 258 lb/d	all year	001
BOD, 5-day, 20 deg. C	monthly average	≤ 258 lb/d	all year	001
BOD, 5-day, 20 deg. C	monthly average	≤ 305 lb/d	all year	001
BOD, 5-day, 20 deg. C	monthly average	≤ 305 lb/d	all year	001
BOD, 5-day, 20 deg. C	daily maximum	≤ 478 lb/d	all year	001
BOD, 5-day, 20 deg. C	daily maximum	≤ 478 lb/d	all year	001
BOD, 5-day, 20 deg. C	daily maximum	≤ 582 lb/d	all year	001
BOD, 5-day, 20 deg. C	daily maximum	≤ 582 lb/d	all year	001
pH	minimum	≥ 6 SU	all year	001
pH	minimum	≥ 6 SU	all year	001
pH	minimum	≥ 6 SU	all year	001
pH	minimum	≥ 6 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
Solids, total suspended	monthly average	≤ 57 mg/L	all year	001
Solids, total suspended	monthly average	≤ 114 mg/L	all year	001
Solids, total suspended	monthly average	≤ 159 mg/L	all year	001
Solids, total suspended	monthly average	≤ 80 mg/L	all year	001
Solids, total suspended	daily maximum	≤ 109 mg/L	all year	001
Solids, total suspended	daily maximum	≤ 218 mg/L	all year	001
Solids, total suspended	daily maximum	≤ 311 mg/L	all year	001
Solids, total suspended	daily maximum	≤ 155 mg/L	all year	001
Solids, total suspended	monthly average	≤ 441 lb/d	all year	001
Solids, total suspended	monthly average	≤ 441 lb/d	all year	001
Solids, total suspended	monthly average	≤ 617 lb/d	all year	001
Solids, total suspended	monthly average	≤ 617 lb/d	all year	001
Solids, total suspended	daily maximum	≤ 845 lb/d	all year	001
Solids, total suspended	daily maximum	≤ 845 lb/d	all year	001
Solids, total suspended	daily maximum	≤ 1206 lb/d	all year	001
Solids, total suspended	daily maximum	≤ 1206 lb/d	all year	001
Nitrogen, ammonia total [as N]	monthly average	report only (ug/L)	Jun–Sep	001
Nitrogen, ammonia total [as N]	monthly average	report only (ug/L)	Jun–Sep	001
Nitrogen, ammonia total [as N]	monthly average	report only (ug/L)	Jun–Sep	001
Nitrogen, ammonia total [as N]	monthly average	report only (ug/L)	Jun–Sep	001
Nitrogen, ammonia total [as N]	monthly average	≤ 13 lb/d	Jun–Sep	001
Nitrogen, ammonia total [as N]	monthly average	≤ 13 lb/d	Jun–Sep	001
Nitrogen, ammonia total [as N]	monthly average	≤ 13 lb/d	Jun–Sep	001
Nitrogen, ammonia total [as N]	monthly average	≤ 13 lb/d	Jun–Sep	001
Phosphorus, total [as P]	monthly average	report only (mg/L)	Jun–Sep	001
Phosphorus, total [as P]	monthly average	report only (mg/L)	Jun–Sep	001
Phosphorus, total [as P]	monthly average	report only (mg/L)	Jun–Sep	001
Phosphorus, total [as P]	monthly average	report only (mg/L)	Jun–Sep	001
Phosphorus, total [as P]	daily maximum	report only (mg/L)	Jun–Sep	001
Phosphorus, total [as P]	daily maximum	report only (mg/L)	Jun–Sep	001
Phosphorus, total [as P]	daily maximum	report only (mg/L)	Jun–Sep	001
Phosphorus, total [as P]	daily maximum	report only (mg/L)	Jun–Sep	001
Phosphorus, total [as P]	monthly average	report only (lb/d)	Jun–Sep	001
Phosphorus, total [as P]	monthly average	report only (lb/d)	Jun–Sep	001
Phosphorus, total [as P]	monthly average	report only (lb/d)	Jun–Sep	001
Phosphorus, total [as P]	monthly average	report only (lb/d)	Jun–Sep	001
Phosphorus, total [as P]	daily maximum	report only (lb/d)	Jun–Sep	001
Phosphorus, total [as P]	daily maximum	report only (lb/d)	Jun–Sep	001
Phosphorus, total [as P]	daily maximum	report only (lb/d)	Jun–Sep	001
Phosphorus, total [as P]	daily maximum	report only (lb/d)	Jun–Sep	001
Chromium, total [as Cr]	monthly average	report only (ug/L)	all year	001
Chromium, total [as Cr]	monthly average	report only (ug/L)	all year	001
Chromium, total [as Cr]	monthly average	report only (ug/L)	all year	001
Chromium, total [as Cr]	monthly average	report only (ug/L)	all year	001
Chromium, total [as Cr]	daily maximum	report only (ug/L)	all year	001
Chromium, total [as Cr]	daily maximum	report only (ug/L)	all year	001
Chromium, total [as Cr]	daily maximum	report only (ug/L)	all year	001
Chromium, total [as Cr]	daily maximum	report only (ug/L)	all year	001
Chromium, total [as Cr]	monthly average	≤ 3.4 lb/d	all year	001
Chromium, total [as Cr]	monthly average	≤ 2.1 lb/d	all year	001
Chromium, total [as Cr]	monthly average	≤ 2.1 lb/d	all year	001
Chromium, total [as Cr]	monthly average	≤ 3.4 lb/d	all year	001
Chromium, total [as Cr]	daily maximum	≤ 6.9 lb/d	all year	001
Chromium, total [as Cr]	daily maximum	≤ 4.1 lb/d	all year	001
Chromium, total [as Cr]	daily maximum	≤ 4.1 lb/d	all year	001
Chromium, total [as Cr]	daily maximum	≤ 6.9 lb/d	all year	001
Copper, total [as Cu]	monthly average	report only (ug/L)	all year	001
Copper, total [as Cu]	monthly average	report only (ug/L)	all year	001
Copper, total [as Cu]	monthly average	report only (ug/L)	all year	001
Copper, total [as Cu]	monthly average	report only (ug/L)	all year	001
Copper, total [as Cu]	daily maximum	report only (ug/L)	all year	001
Copper, total [as Cu]	daily maximum	report only (ug/L)	all year	001
Copper, total [as Cu]	daily maximum	report only (ug/L)	all year	001
Copper, total [as Cu]	daily maximum	report only (ug/L)	all year	001
Copper, total [as Cu]	daily maximum	≤ .09 lb/d	all year	001
Copper, total [as Cu]	daily maximum	≤ .09 lb/d	all year	001
Copper, total [as Cu]	daily maximum	≤ .09 lb/d	all year	001
Copper, total [as Cu]	daily maximum	≤ .09 lb/d	all year	001
Antimony, total [as Sb]	monthly average	report only (ug/L)	all year	001
Antimony, total [as Sb]	monthly average	report only (ug/L)	all year	001
Antimony, total [as Sb]	monthly average	report only (mg/L)	all year	001
Antimony, total [as Sb]	monthly average	report only (ug/L)	all year	001
Antimony, total [as Sb]	monthly average	≤ 3.4 lb/d	all year	001
Antimony, total [as Sb]	monthly average	≤ 3.4 lb/d	all year	001
Antimony, total [as Sb]	monthly average	≤ 3.4 lb/d	all year	001
Antimony, total [as Sb]	monthly average	≤ 3.4 lb/d	all year	001
E. coli, thermotol, MF, MTEC	monthly geometric mean	≤ 64 #/100mL	May–Sep	001
E. coli, thermotol, MF, MTEC	monthly geometric mean	≤ 64 #/100mL	May–Sep	001
E. coli, thermotol, MF, MTEC	monthly geometric mean	≤ 64 #/100mL	May–Sep	001
E. coli, thermotol, MF, MTEC	monthly geometric mean	≤ 64 #/100mL	May–Sep	001
E. coli, thermotol, MF, MTEC	daily maximum	≤ 427 #/100mL	May–Sep	001
E. coli, thermotol, MF, MTEC	daily maximum	≤ 427 #/100mL	May–Sep	001
E. coli, thermotol, MF, MTEC	daily maximum	≤ 427 #/100mL	May–Sep	001
E. coli, thermotol, MF, MTEC	daily maximum	≤ 427 #/100mL	May–Sep	001
Phenols	monthly average	report only (ug/L)	all year	001
Phenols	monthly average	report only (ug/L)	all year	001
Phenols	monthly average	report only (ug/L)	all year	001
Phenols	monthly average	report only (ug/L)	all year	001
Phenols	daily maximum	report only (ug/L)	all year	001
Phenols	daily maximum	report only (ug/L)	all year	001
Phenols	daily maximum	report only (ug/L)	all year	001
Phenols	daily maximum	report only (ug/L)	all year	001
Phenols	monthly average	≤ 2.1 lb/d	all year	001
Phenols	monthly average	≤ 3.4 lb/d	all year	001
Phenols	monthly average	≤ 2.1 lb/d	all year	001
Phenols	monthly average	≤ 3.4 lb/d	all year	001
Phenols	daily maximum	≤ 4.1 lb/d	all year	001
Phenols	daily maximum	≤ 6.9 lb/d	all year	001
Phenols	daily maximum	≤ 4.1 lb/d	all year	001
Phenols	daily maximum	≤ 6.9 lb/d	all year	001
Flow, in conduit or thru treatment plant	monthly average	≤ .465 MGD	all year	001
Flow, in conduit or thru treatment plant	monthly average	≤ .465 MGD	all year	001
Flow, in conduit or thru treatment plant	monthly average	≤ .93 MGD	all year	001
Flow, in conduit or thru treatment plant	monthly average	≤ .93 MGD	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
Chlorine, total residual	monthly average	≤ .1 mg/L	all year	001
Chlorine, total residual	monthly average	≤ .1 mg/L	all year	001
Chlorine, total residual	monthly average	≤ .1 mg/L	all year	001
Chlorine, total residual	monthly average	≤ .1 mg/L	all year	001
Chlorine, total residual	daily maximum	≤ .17 mg/L	all year	001
Chlorine, total residual	daily maximum	≤ .3 mg/L	all year	001
Chlorine, total residual	daily maximum	≤ .3 mg/L	all year	001
Chlorine, total residual	daily maximum	≤ .17 mg/L	all year	001
Mercury, total [as Hg]	monthly average	≤ 25.8 ng/L	all year	001
Mercury, total [as Hg]	monthly average	≤ 25.8 ng/L	all year	001
Mercury, total [as Hg]	monthly average	≤ 25.8 ng/L	all year	001
Mercury, total [as Hg]	monthly average	≤ 25.8 ng/L	all year	001
Mercury, total [as Hg]	daily maximum	≤ 38.7 ng/L	all year	001
Mercury, total [as Hg]	daily maximum	≤ 38.7 ng/L	all year	001
Mercury, total [as Hg]	daily maximum	≤ 38.7 ng/L	all year	001
Mercury, total [as Hg]	daily maximum	≤ 38.7 ng/L	all year	001
Chemical oxygen demand [COD]	monthly average	≤ 234 mg/L	all year	001
Chemical oxygen demand [COD]	monthly average	≤ 468 mg/L	all year	001
Chemical oxygen demand [COD]	monthly average	≤ 710 mg/L	all year	001
Chemical oxygen demand [COD]	monthly average	≤ 355 mg/L	all year	001
Chemical oxygen demand [COD]	daily maximum	≤ 567 mg/L	all year	001
Chemical oxygen demand [COD]	daily maximum	≤ 1133 mg/L	all year	001
Chemical oxygen demand [COD]	daily maximum	≤ 1404 mg/L	all year	001
Chemical oxygen demand [COD]	daily maximum	≤ 702 mg/L	all year	001
Chemical oxygen demand [COD]	monthly average	≤ 1817 lb/d	all year	001
Chemical oxygen demand [COD]	monthly average	≤ 1817 lb/d	all year	001
Chemical oxygen demand [COD]	monthly average	≤ 2752 lb/d	all year	001
Chemical oxygen demand [COD]	monthly average	≤ 2752 lb/d	all year	001
Chemical oxygen demand [COD]	daily maximum	≤ 4394 lb/d	all year	001
Chemical oxygen demand [COD]	daily maximum	≤ 4394 lb/d	all year	001
Chemical oxygen demand [COD]	daily maximum	≤ 5443 lb/d	all year	001
Chemical oxygen demand [COD]	daily maximum	≤ 5443 lb/d	all year	001
Analytical Chemistry	value	report only (N=0;Y=1)	all year	002
Analytical Chemistry	value	report only (N=0;Y=1)	all year	002
Analytical Chemistry	value	report only (N=0;Y=1)	all year	002
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia	daily minimum	≥ 4 %	all year	002
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia	daily minimum	≥ 4 %	all year	002
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia	daily minimum	≥ 7.7 %	all year	002
NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia	daily minimum	≥ 7.7 %	all year	002
Noel Statre 10Day Chronic Salvel. Salmonid	daily minimum	≥ 7.7 %	all year	002
Noel Statre 10Day Chronic Salvel. Salmonid	daily minimum	≥ 4 %	all year	002
Noel Statre 10Day Chronic Salvel. Salmonid	daily minimum	≥ 4 %	all year	002
Noel Statre 10Day Chronic Salvel. Salmonid	daily minimum	≥ 7.7 %	all year	002
NOAEL Static 48Hr Acute Ceriodaphnia dubia	daily minimum	report only (%)	all year	002
NOAEL Static 48Hr Acute Ceriodaphnia dubia	daily minimum	≥ 11 %	all year	002
NOAEL Static 48Hr Acute Ceriodaphnia dubia	daily minimum	≥ 11 %	all year	002
NOAEL Static 48Hr Acute Ceriodaphnia dubia	daily minimum	report only (%)	all year	002
NOAEL Static 48Hr Acute Salvel. Salmonid	daily minimum	report only (%)	all year	002
NOAEL Static 48Hr Acute Salvel. Salmonid	daily minimum	report only (%)	all year	002
NOAEL Static 48Hr Acute Salvel. Salmonid	daily minimum	report only (%)	all year	002
NOAEL Static 48Hr Acute Salvel. Salmonid	daily minimum	report only (%)	all year	002
Temperature, water deg. centigrade	daily maximum	report only (deg C)	May	MW1
Specific conductance	daily maximum	report only (umho/cm)	May	MW1
pH	daily maximum	report only (SU)	May	MW1
Solids, total suspended	daily maximum	report only (mg/L)	May	MW1
Nitrogen, nitrate total [as N]	daily maximum	≤ 10 mg/L	May	MW1
Depth to water level ft below landsurface	daily maximum	report only (ft)	May	MW1
Temperature, water deg. centigrade	daily maximum	report only (deg C)	May	MW4
Specific conductance	daily maximum	report only (umho/cm)	May	MW4
pH	daily maximum	report only (SU)	May	MW4
Solids, total suspended	daily maximum	report only (mg/L)	May	MW4
Nitrogen, nitrate total [as N]	daily maximum	≤ 10 mg/L	May	MW4
Depth to water level ft below landsurface	daily maximum	report only (ft)	May	MW4

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/ME0102032 · MCP: https://passage-data.com/mcp