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Waterville Valley Advanced W W T F

Sewage treatment plant, major discharger, Waterville Valley, New Hampshire. NPDES permit NH0100781, in force until Mar 31, 2027. Last 12 months: over a limit 2 times (last March 2026), 82 required values missing, 3 of 26 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (39 values), outfall 001 form PA monthly (1 value), outfall 001 form T quarterly (12 values), outfall 001 form TA quarterly (12 values), outfall PFAS form E quarterly (4 values), outfall PFAS form IF quarterly (4 values), and 1 more form
Renewal application due
Oct 2, 2026 · 180 days before expiry; your permit may set another date
Last report on file
June 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 6 of 33 reports late

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

Period endingParameterReportedLimitOver by
March 2026LC50 Static 48Hr Acute Ceriodaphnia dubia, minimum77.1 %≥ 100 %23%
March 2026LC50 Static 48Hr Acute Pimephales promelas, minimum71.4 %≥ 100 %29%

Limits in force (90)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 5 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 5 mg/Lall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 5 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 23 lb/dall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 23 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 23 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 8 SUall year001
pHdaily maximumreport only (SU)all year001
Solids, total suspendedmonthly average≤ 1 mg/Lall year001
Solids, total suspendedweekly average≤ 2 mg/Lall year001
Solids, total suspendeddaily maximum≤ 4 mg/Lall year001
Solids, total suspendedmonthly average≤ 5 lb/dall year001
Solids, total suspendeddaily maximum≤ 18 lb/dall year001
Solids, total suspendedweekly average≤ 9 lb/dall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (lb/d)all year001
Nitrogen, ammonia total [as N]monthly average≤ 11.4 mg/LMay, Jun, Sep, Oct001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Jul, Aug001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 14.6 mg/LMay, Jun, Sep, Oct001
Nitrogen, ammonia total [as N]weekly averagereport only (mg/L)May, Jun, Sep, Oct001
Nitrogen, ammonia total [as N]weekly average≤ 1 mg/LJul, Aug001
Nitrogen, ammonia total [as N]weekly averagereport only (mg/L)May, Jun, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)May, Jun, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jul, Aug001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)May, Jun, Sep, Oct001
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)May, Jun, Sep, Oct001
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Jul, Aug001
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)May, Jun, Sep, Oct001
Nitrogen, ammonia total [as N]weekly averagereport only (lb/d)May, Jun, Sep, Oct001
Nitrogen, ammonia total [as N]weekly average≤ 5 lb/dJul, Aug001
Nitrogen, ammonia total [as N]weekly averagereport only (lb/d)May, Jun, Sep, Oct001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year001
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]monthly average≤ .71 mg/Lall year001
Phosphorus, total [as P]daily maximum≤ 1 mg/Lall year001
Phosphorus, total [as P]daily maximumreport only (ug/L)Apr–Oct001
Carbon, tot organic [TOC]daily maximumreport only (mg/L)all year001
Carbon, tot organic [TOC]daily maximumreport only (mg/L)all year001
Carbon, dissolved organic [as C]daily maximumreport only (mg/L)all year001
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year001
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year001
Nickel, total recoverabledaily maximumreport only (mg/L)all year001
Nickel, total recoverabledaily maximumreport only (ug/L)all year001
Zinc, total recoverabledaily maximumreport only (mg/L)all year001
Zinc, total recoverabledaily maximumreport only (ug/L)all year001
Aluminum, total recoverablemonthly average≤ 87 ug/Lall year001
Aluminum, total recoverabledaily maximumreport only (mg/L)all year001
Aluminum, total recoverabledaily maximumreport only (ug/L)all year001
Cadmium, total recoverabledaily maximumreport only (ug/L)all year001
Lead, total recoverabledaily maximumreport only (mg/L)all year001
Lead, total recoverabledaily maximumreport only (ug/L)all year001
Copper, total recoverabledaily maximumreport only (mg/L)all year001
Copper, total recoverabledaily maximumreport only (ug/L)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantrolling average≤ .55 MGDall year001
Chlorine, total residualmonthly average≤ .08 mg/Lall year001
Chlorine, total residualdaily maximum≤ .14 mg/Lall year001
E. colimonthly geometric mean≤ 126 #/100mLall year001
E. colidaily maximum≤ 406 #/100mLall year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
LC50 Static 48Hr Acute Ceriodaphnia dubiaminimum≥ 100 %all year001
LC50 Static 48Hr Acute Pimephales promelasminimum≥ 100 %all year001
NOEL Static 7Day Chronic Ceriodaphnia dubiaminimum≥ 13.3 %all year001
Noel Statre 7Day Chronic Pimephalesminimum≥ 13.3 %all year001
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/L)Jul–DecPFAS
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/L)Jul–DecPFAS
Perfluorooctanoic acid (PFOA)daily maximumreport only (ng/g)Jul–DecPFAS
Perfluorononanoic acid (PFNA)daily maximumreport only (ng/L)Jul–DecPFAS
Perfluorononanoic acid (PFNA)daily maximumreport only (ng/L)Jul–DecPFAS
Perfluorononanoic acid (PFNA)daily maximumreport only (ng/g)Jul–DecPFAS
Perfluorohexanesulfonic acid (PFHxS)daily maximumreport only (ng/L)Jul–DecPFAS
Perfluorohexanesulfonic acid (PFHxS)daily maximumreport only (ng/L)Jul–DecPFAS
Perfluorohexanesulfonic acid (PFHxS)daily maximumreport only (ng/g)Jul–DecPFAS
Perfluorooctanesulfonic acid (PFOS)daily maximumreport only (ng/L)Jul–DecPFAS
Perfluorooctanesulfonic acid (PFOS)daily maximumreport only (ng/L)Jul–DecPFAS
Perfluorooctanesulfonic acid (PFOS)daily maximumreport only (ng/g)Jul–DecPFAS

How strict are these limits?

Cited limits by parameter: New Hampshire'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/NH0100781 · MCP: https://passage-data.com/mcp