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Walden (V)

Sewage treatment plant, major discharger, Walden, New York. NPDES permit NY0030490, in force until Jul 31, 2031. Last 12 months: over a limit 29 times (last August 2026), 3 of 29 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form M monthly (50 values), form E quarterly, form Q quarterly
Last report on file
August 2026
Oct 2024 – Sep 2025
46 values over a limit, 10 required values missing, 7 of 33 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

All 29 values over a limit
Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], daily maximum121 lb/d≤ 24 lb/d404%
October 2025Nitrogen, ammonia total [as N], daily maximum17.6 mg/L≤ 2.4 mg/L633%
October 2025Oxygen demand, ultimate, monthly average85.3 mg/L≤ 80 mg/L7%
January 2026BOD, carbonaceous [5 day, 20 C], 7-day average44.5 mg/L≤ 40 mg/L11%
January 2026BOD, carbonaceous [5 day, 20 C], monthly average29.7 mg/L≤ 25 mg/L19%
January 2026Carbonaceous oxygen demand, % removal, monthly average minimum81.2 %≥ 85 %25%
February 2026BOD, carbonaceous [5 day, 20 C], 7-day average453.3 lb/d≤ 400 lb/d13%
February 2026BOD, carbonaceous [5 day, 20 C], 7-day average53.4 mg/L≤ 40 mg/L34%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average381.7 lb/d≤ 250 lb/d53%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average41.5 mg/L≤ 25 mg/L66%
March 2026BOD, carbonaceous [5 day, 20 C], 7-day average678.9 lb/d≤ 400 lb/d70%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average511.7 lb/d≤ 250 lb/d105%
March 2026Flow, in conduit or thru treatment plant, monthly average2.7 MGD≤ 1.2 MGD125%
March 2026Solids, total suspended, 7-day average496.2 lb/d≤ 450 lb/d10%
March 2026Solids, total suspended, monthly average315 lb/d≤ 300 lb/d5%
April 2026Flow, in conduit or thru treatment plant, monthly average1.4 MGD≤ 1.2 MGD17%
May 2026Flow, in conduit or thru treatment plant, monthly average1.3 MGD≤ 1.2 MGD8%
May 2026Nitrogen, ammonia total [as N], daily maximum13 mg/L≤ 2.4 mg/L442%
May 2026Nitrogen, ammonia total [as N], daily maximum142.2 lb/d≤ 24 lb/d493%
June 2026Nitrogen, ammonia total [as N], daily maximum107.6 lb/d≤ 24 lb/d348%
June 2026Nitrogen, ammonia total [as N], daily maximum12.9 mg/L≤ 2.4 mg/L438%
July 2026Flow, in conduit or thru treatment plant, monthly average1.3 MGD≤ 1.2 MGD8%
July 2026Nitrogen, ammonia total [as N], daily maximum155.2 lb/d≤ 24 lb/d547%
July 2026Nitrogen, ammonia total [as N], daily maximum9.9 mg/L≤ 2.4 mg/L313%
July 2026Oxygen demand, ultimate, monthly average822 lb/d≤ 800 lb/d3%
August 2026Flow, in conduit or thru treatment plant, monthly average1.4 MGD≤ 1.2 MGD17%
August 2026Nitrogen, ammonia total [as N], daily maximum129.7 lb/d≤ 24 lb/d440%
August 2026Nitrogen, ammonia total [as N], daily maximum9.3 mg/L≤ 2.4 mg/L288%
August 2026Oxygen demand, ultimate, monthly average922 lb/d≤ 800 lb/d15%

Limits in force (131)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year
Oxygen demand, ultimatemonthly average≤ 80 mg/LJun–Oct
Oxygen demand, ultimatedaily maximumreport only (mg/L)Jun–Oct
Oxygen demand, ultimatemonthly average≤ 800 lb/dJun–Oct
Oxygen demand, ultimatedaily maximumreport only (lb/d)Jun–Oct
pHdaily minimum≥ 6.5 SUall year
pHminimum≥ 6 SUall year
pHdaily maximum≤ 8.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 450 lb/dall year
Solids, total suspendedmonthly average≤ 300 lb/dall year
Solids, total suspended7-day average≤ 676 lb/dall year
Solids, total suspended7-day average≤ 450 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspended7-day averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, total suspended7-day averagereport only (lb/d)all year
Solids, settleabledaily maximum≤ .3 mL/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 1.1 mg/LJun–Oct
Nitrogen, ammonia total [as N]monthly average≤ 1.7 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)May–Oct
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 2.4 mg/LMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)May–Oct
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Jan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 24 lb/dMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 39 lb/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)all year
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Jun–Oct
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)Jun–Oct
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (lb/d)Jun–Oct
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (lb/d)Jun–Oct
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Jun–Oct
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)Jun–Oct
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (lb/d)Jun–Oct
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (lb/d)Jun–Oct
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (lb/d)all year
Cadmium, total [as Cd]daily maximum≤ 25 ug/Lall year
Cadmium, total [as Cd]daily maximum≤ 25 ug/Lall year
Cadmium, total [as Cd]daily maximum≤ .25 lb/dall year
Copper, total [as Cu]daily maximum≤ 74 ug/Lall year
Copper, total [as Cu]daily maximum≤ 50 ng/Lall year
Copper, total [as Cu]daily maximumreport only (g/d)all year
Lead, total [as Pb]daily maximum≤ 20 ug/Lall year
Lead, total [as Pb]daily maximum≤ 20 ug/Lall year
Lead, total [as Pb]daily maximum≤ .2 lb/dall year
Silver, total [as Ag]daily maximum≤ .16 ug/Lall year
Silver, total [as Ag]daily maximumreport only (ug/L) (alert, not enforceable)all year
Silver, total [as Ag]daily maximum≤ .1 lb/d (alert, not enforceable)all year
Zinc, total [as Zn]daily maximumreport only (ug/L) (alert, not enforceable)all year
Zinc, total [as Zn]daily maximum≤ 2 lb/d (alert, not enforceable)all year
Flow, in conduit or thru treatment plantmonthly average≤ 1.8 MGDall year
Flow, in conduit or thru treatment plantmonthly average≤ 1.2 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly averagereport only (ug/L)May–Oct
Chlorine, total residualdaily maximum≤ .03 mg/Lall year
Chlorine, total residualdaily maximum≤ 72 ug/LMay–Oct
Chlorine, total residualmonthly averagereport only (lb/d)May–Oct
Chlorine, total residualdaily maximum≤ .72 lb/dMay–Oct
Perfluorooctanoic acid (PFOA)daily maximum≤ 10 ng/L (alert, not enforceable)all year
Perfluorobutanoic acid (PFBA)daily maximumreport only (ng/L)all year
Perfluorooctanesulfonamide (PFOSA)daily maximumreport only (ng/L)all year
Perfluoropentanoic acid (PFPeA)daily maximumreport only (ng/L)all year
Perfluorohexanoic acid (PFHxA)daily maximumreport only (ng/L)all year
Perfluoroheptanoic acid (PFHpA)daily maximumreport only (ng/L)all year
Perfluorononanoic acid (PFNA)daily maximumreport only (ng/L)all year
Perfluorodecanoic acid (PFDA)daily maximumreport only (ng/L)all year
Perfluoroundecanoic acid (PFUnA)daily maximumreport only (ng/L)all year
Perfluorododecanoic acid (PFDoA)daily maximumreport only (ng/L)all year
Perfluorotridecanoic acid (PFTrDA)daily maximumreport only (ng/L)all year
Perfluorotetradecanoic acid (PFTeDA)daily maximumreport only (ng/L)all year
N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)daily maximumreport only (ng/L)all year
N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)daily maximumreport only (ng/L)all year
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)daily maximumreport only (ng/L)all year
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)daily maximumreport only (ng/L)all year
Perfluorobutanesulfonic acid (PFBS)daily maximumreport only (ng/L)all year
Perfluorodecanesulfonic acid (PFDS)daily maximumreport only (ng/L)all year
Perfluoroheptanesulfonic acid (PFHpS)daily maximumreport only (ng/L)all year
Perfluorohexanesulfonic acid (PFHxS)daily maximumreport only (ng/L)all year
Perfluorooctanesulfonic acid (PFOS)daily maximum≤ 10 ng/L (alert, not enforceable)all year
1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)daily maximumreport only (ng/L)all year
1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)daily maximumreport only (ng/L)all year
1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)daily maximumreport only (ng/L)all year
Perfluoropentanesulfonic acid (PFPeS)daily maximumreport only (ng/L)all year
Perfluorononanesulfonic acid (PFNS)daily maximumreport only (ng/L)all year
Hexafluoropropylene oxide dimer acid (HFPO-DA)daily maximumreport only (ng/L)all year
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)daily maximumreport only (ng/L)all year
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)daily maximumreport only (ng/L)all year
Perfluorododecanesulfonic acid (PFDoS)daily maximumreport only (ng/L)all year
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)daily maximumreport only (ng/L)all year
N-methyl perfluorooctanesulfonamide (NMeFOSA)daily maximumreport only (ng/L)all year
N-ethyl perfluorooctanesulfonamide (NEtFOSA)daily maximumreport only (ng/L)all year
Mercury, total [as Hg]daily maximum≤ 50 ng/Lall year
Mercury, total [as Hg]daily maximumreport only (g/d)all year
Coliform, fecal general30-day geometric mean≤ 200 #/100mLMay–Oct
Coliform, fecal general7-day geometric mean≤ 400 #/100mLMay–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 375 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 250 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 600 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 400 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]7-day averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)all year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)all year
BOD, carbonaceous [5 day, 20 C]7-day averagereport only (lb/d)all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
Carbonaceous oxygen demand, % removalmonthly average minimum≥ 85 %all year
3-Perfluoropropyl propanoic acid (3:3 FTCA)daily maximumreport only (ng/L)all year
Perfluoro-3-methoxypropanoic acid (PFMPA)daily maximumreport only (ng/L)all year
9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)daily maximumreport only (ng/L)all year
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)daily maximumreport only (ng/L)all year
3-Perfluoroheptyl propanoic acid (7:3 FTCA)daily maximumreport only (ng/L)all year
Perfluoro-4-methoxybutanoic acid (PFMBA)daily maximumreport only (ng/L)all year
2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)daily maximumreport only (ng/L)all year

New limits from Feb 1, 2031

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Mercury, total [as Hg], daily maximum25 ng/Ltighter7.5 ng/L (4 values)0.3×
Phosphorus, total [as P], monthly average2.6 mg/Lnew——
Phosphorus, total [as P], monthly average39 lb/dnew——

How strict are these limits?

Cited limits by parameter: New York's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NY0030490 · MCP: https://passage-data.com/mcp