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Chadron Potable WTP

Water Supply, Chadron, Nebraska. NPDES permit NE0132519, in force until Dec 31, 2029. Last 12 months: over a limit 4 times (last June 2026), 2 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 28 days after each period: form M quarterly (2 values), form Q quarterly (6 values), form A yearly
Last report on file: June 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 0 of 17 reports late

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

Period ending	Parameter	Reported	Limit	Over by
March 2026	Chlorine, total residual, daily maximum	< .02 mg/L	≤ .019 mg/L	5%
March 2026	Chlorine, total residual, monthly average	< .02 mg/L	≤ .011 mg/L	82%
June 2026	Chlorine, total residual, daily maximum	< .02 mg/L	≤ .019 mg/L	5%
June 2026	Chlorine, total residual, monthly average	< .02 mg/L	≤ .011 mg/L	82%

Limits in force (10)

Parameter	Statistic	Limit	Months
pH	daily minimum	≥ 6.5 SU	all year
pH	daily maximum	≤ 9 SU	all year
Solids, total suspended	monthly average	≤ 30 mg/L	all year
Solids, total suspended	daily maximum	≤ 45 mg/L	all year
Arsenic, total [as As]	monthly average	report only (mg/L)	all year
Arsenic, total [as As]	daily maximum	report only (mg/L)	all year
Flow, in conduit or thru treatment plant	monthly average	report only (gal/d)	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (gal/d)	all year
Chlorine, total residual	monthly average	≤ .011 mg/L	all year
Chlorine, total residual	daily maximum	≤ .019 mg/L	all year

How strict are these limits?

Chlorine, total residual, daily maximum .019 mg/L — stricter than 90% of 44 other minor industrial and other permits in Nebraska; 9% have the same limit
Chlorine, total residual, monthly average .011 mg/L — stricter than 50% of 44 other minor industrial and other permits in Nebraska; 18% have the same limit
Solids, total suspended, daily maximum 45 mg/L — stricter than 50% of 28 other minor industrial and other permits in Nebraska; 39% have the same limit

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

Same industry: the 17 Water Supply permits in Nebraska.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NE0132519 · MCP: https://passage-data.com/mcp