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NRV RegionaI Water Authority

Water Supply, major discharger, Radford, Virginia. NPDES permit VA0052850, in force until Feb 28, 2027. Last 12 months: over a limit 2 times (last December 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due: About 10 days after each period: form M1 monthly (8 values), form S1 twice a year
Renewal application due: Sep 1, 2026 · 180 days before expiry; your permit may set another date
Last report on file: August 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 0 of 14 reports late

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

Period ending	Parameter	Reported	Limit	Over by
December 2025	Chlorine, total residual, daily maximum	.1	≤ .016 mg/L	525%
December 2025	Chlorine, total residual, monthly average	.1	≤ .016 mg/L	525%

Limits in force (9)

Parameter	Statistic	Limit	Months
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	monthly average	≤ 30 mg/L	all year
Solids, total suspended	daily maximum	≤ 60 mg/L	all year
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year
Chlorine, total residual	monthly average	≤ .016 mg/L	all year
Chlorine, total residual	daily maximum	≤ .016 mg/L	all year
Toxicity, final conc toxicity units	daily maximum	≤ 1.49 tox chronic	all year

How strict are these limits?

Chlorine, total residual, daily maximum .016 mg/L — stricter than 94% of 420 other major industrial and other permits nationwide; 1% have the same limit
Chlorine, total residual, monthly average .016 mg/L — stricter than 75% of 20 other major industrial and other permits in Virginia
Solids, total suspended, daily maximum 60 mg/L — stricter than 43% of 23 other major industrial and other permits in Virginia; 9% have the same limit

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

Same industry: the 24 Water Supply permits in Virginia.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/VA0052850 · MCP: https://passage-data.com/mcp