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Luke Saugier - Hilcorp Alaska, LLC

Oil And Gas Exploration Services, major discharger, Prudhoe Bay, Alaska. NPDES permit AK0029840, in force until Aug 31, 2031. Last 12 months: no values over a limit, 5 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 15 days after each period: form AM monthly (7 values)
Last report on file: August 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 6 of 12 reports late

Limits in force (7)

Parameter	Statistic	Limit	Months
Temp. diff. between samp. & upstrm deg. C	daily maximum	≤ 20 deg C	all year
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	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	≤ 12.4 MGD	all year
Chlorine, total residual	daily maximum	≤ 100 ug/L	all year
Chlorine, total residual	monthly average	≤ 100 ug/L	all year

How strict are these limits?

Chlorine, total residual, daily maximum 100 ug/L — stricter than 14% of 168 other major industrial and other permits nationwide; 5% have the same limit
Chlorine, total residual, monthly average 100 ug/L — stricter than 10% of 82 other major industrial and other permits nationwide; 4% have the same limit

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

Same industry: the 11 Oil and Gas Extraction permits in Alaska.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/AK0029840 · MCP: https://passage-data.com/mcp