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Onslow Water and Sewer Authority

Water Supply, Sneads Ferry, North Carolina. NPDES permit NC0083551, in force until Jul 31, 2029. Last 12 months: no values over a limit, 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 30 days after each period: form M monthly (24 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 1 required value missing, 0 of 12 reports late

Limits in force (24)

ParameterStatisticLimitMonths
Turbiditydaily maximumreport only (NTU)all year
Conductivitydaily maximumreport only (umho/cm)all year
Conductivitydaily maximumreport only (umho/cm)all year
Conductivitydaily maximumreport only (umho/cm)all year
Oxygen, dissolved [DO]daily maximumreport only (mg/L)all year
Oxygen, dissolved [DO]daily maximumreport only (mg/L)all year
Oxygen, dissolved [DO]daily maximumreport only (mg/L)all year
pHdaily minimum≥ 6.8 SUall year
pHdaily maximum≤ 8.5 SUall year
pHdaily maximumreport only (SU)all year
pHdaily maximumreport only (SU)all year
Salinitydaily maximumreport only (ppk)all year
Salinitydaily maximumreport only (ppk)all year
Salinitydaily maximumreport only (ppk)all year
Solids, total suspended30-day average≤ 10 mg/Lall year
Solids, total suspendeddaily maximum≤ 15 mg/Lall year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Chloride [as Cl]daily maximumreport only (mg/L)all year
Manganese, total [as Mn]daily maximumreport only (ug/L)all year
Zinc, total [as Zn]30-day average≤ 42.8 ug/Lall year
Zinc, total [as Zn]daily maximum≤ 47.6 ug/Lall year
Flow, in conduit or thru treatment plant30-day average≤ .59 MGDall year
Chlorine, total residualdaily maximum≤ 13 ug/Lall year
Solids, total dissolveddaily maximumreport only (mg/L)all year

How strict are these limits?

Cited limits by parameter: North Carolina's rules and the federal ones.

Same industry: the 130 Water Supply permits in North Carolina.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NC0083551 · MCP: https://passage-data.com/mcp