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Star Island Treatment Facility

Nonresidential Building Operators, Rye, New Hampshire. NPDES permit NH0101028 expired Aug 31, 2026; its limits still apply. Last 12 months: over a limit 21 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (26 values), outfall 001 form T monthly (7 values), outfall 001 form TA monthly (10 values), outfall 002 form A monthly (8 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
10 values over a limit, 1 required value missing, 1 of 32 reports late

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

All 21 values over a limit
Period endingParameterReportedLimitOver by
October 2025Enterococci: group D, MF trans, M-E, EIA, daily maximum203 #/100mL≤ 104 #/100mL95%
October 2025Enterococci: group D, MF trans, M-E, EIA, monthly geometric mean48.4 #/100mL≤ 35 #/100mL38%
June 2026pH, maximum8.1 SU≤ 8 SU—
July 2026BOD, 5-day, 20 deg. C, daily maximum110 mg/L≤ 50 mg/L120%
July 2026BOD, 5-day, 20 deg. C, daily maximum7.1 lb/d≤ 6.3 lb/d13%
July 2026BOD, 5-day, 20 deg. C, weekly average61 mg/L≤ 45 mg/L36%
July 2026Chlorine, total residual, daily maximum4.79 mg/L≤ 1 mg/L379%
July 2026Enterococci: group D, MF trans, M-E, EIA, daily maximum345 #/100mL≤ 104 #/100mL232%
July 2026Solids, total suspended, daily maximum66 mg/L≤ 50 mg/L32%
July 2026Solids, total suspended, monthly average31 mg/L≤ 30 mg/L3%
August 2026BOD, 5-day, 20 deg. C, daily maximum1300 mg/L≤ 50 mg/L2500%
August 2026BOD, 5-day, 20 deg. C, daily maximum75 lb/d≤ 6.3 lb/d1090%
August 2026BOD, 5-day, 20 deg. C, monthly average10.7 lb/d≤ 3.8 lb/d182%
August 2026BOD, 5-day, 20 deg. C, monthly average174 mg/L≤ 30 mg/L480%
August 2026BOD, 5-day, 20 deg. C, weekly average38.1 lb/d≤ 5.6 lb/d580%
August 2026BOD, 5-day, 20 deg. C, weekly average659 mg/L≤ 45 mg/L1364%
August 2026Enterococci: group D, MF trans, M-E, EIA, daily maximum2064 #/100mL≤ 104 #/100mL1885%
August 2026Solids, total suspended, weekly average50 mg/L≤ 45 mg/L11%
August 2026pH, maximum8.1 SU≤ 8 SU—
September 2026BOD, 5-day, 20 deg. C, weekly average55 mg/L≤ 45 mg/L22%
September 2026Enterococci: group D, MF trans, M-E, EIA, daily maximum1624 #/100mL≤ 104 #/100mL1462%

Limits in force (51)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradedaily maximumreport only (deg C)Apr–Nov001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LApr–Nov001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LApr–Nov001
BOD, 5-day, 20 deg. Cdaily maximum≤ 50 mg/LApr–Nov001
BOD, 5-day, 20 deg. Cmonthly average≤ 3.8 lb/dApr–Nov001
BOD, 5-day, 20 deg. Cdaily maximum≤ 6.3 lb/dApr–Nov001
BOD, 5-day, 20 deg. Cweekly average≤ 5.6 lb/dApr–Nov001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)Apr–Nov001
pHminimum≥ 6 SUApr–Nov001
pHmaximum≤ 8 SUApr–Nov001
pHdaily maximumreport only (SU)Apr–Nov001
Salinitydaily maximumreport only (mg/L)Apr–Nov001
Solids, total suspendedmonthly average≤ 30 mg/LApr–Nov001
Solids, total suspendedweekly average≤ 45 mg/LApr–Nov001
Solids, total suspendeddaily maximum≤ 50 mg/LApr–Nov001
Solids, total suspendedmonthly average≤ 4.4 lb/dApr–Nov001
Solids, total suspendeddaily maximum≤ 7.3 lb/dApr–Nov001
Solids, total suspendedweekly average≤ 6.6 lb/dApr–Nov001
Solids, total suspendedmonthly averagereport only (mg/L)Apr–Nov001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Apr–Nov001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Apr–Nov001
Carbon, tot organic [TOC]daily maximumreport only (mg/L)Apr–Nov001
Carbon, tot organic [TOC]daily maximumreport only (mg/L)Apr–Nov001
Cadmium, total [as Cd]daily maximumreport only (mg/L)Apr–Nov001
Cadmium, total [as Cd]daily maximumreport only (mg/L)Apr–Nov001
Copper, total [as Cu]daily maximumreport only (mg/L)Apr–Nov001
Copper, total [as Cu]daily maximumreport only (mg/L)Apr–Nov001
Lead, total [as Pb]daily maximumreport only (mg/L)Apr–Nov001
Lead, total [as Pb]daily maximumreport only (mg/L)Apr–Nov001
Nickel, total [as Ni]daily maximumreport only (mg/L)Apr–Nov001
Nickel, total [as Ni]daily maximumreport only (mg/L)Apr–Nov001
Zinc, total [as Zn]daily maximumreport only (mg/L)Apr–Nov001
Zinc, total [as Zn]daily maximumreport only (mg/L)Apr–Nov001
Enterococci: group D, MF trans, M-E, EIAmonthly geometric mean≤ 35 #/100mLApr–Nov001
Enterococci: group D, MF trans, M-E, EIAdaily maximum≤ 104 #/100mLApr–Nov001
Flow, in conduit or thru treatment plantmonthly average≤ .0175 MGDApr–Nov001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)Apr–Nov001
Chlorine, total residualmonthly average≤ .64 mg/LApr–Nov001
Chlorine, total residualdaily maximum≤ 1 mg/LApr–Nov001
Coliform, total - % samples exceeding limitmaximum monthly geometric mean≤ 10 %Apr–Nov001
Coliform, fecal generalmonthly geometric mean≤ 14 #/100mLApr–Nov001
BOD, 5-day, percent removalmonthly minimum≥ 85 %Apr–Nov001
Solids, suspended percent removalmonthly minimum≥ 85 %Apr–Nov001
pHminimum≥ 6.5 SUApr–Nov002
pHmaximum≤ 8.3 SUApr–Nov002
Solids, total suspendedmonthly average≤ 30 mg/LApr–Nov002
Solids, total suspendedweekly averagereport only (mg/L)Apr–Nov002
Solids, total suspendeddaily maximum≤ 50 mg/LApr–Nov002
Solids, total suspendedmonthly average≤ 20 lb/dApr–Nov002
Flow, in conduit or thru treatment plantmonthly average≤ .08 MGDApr–Nov002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)Apr–Nov002

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/NH0101028 · MCP: https://passage-data.com/mcp