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CPF 320053001W - NORTHERN NATURAL GAS CO — Warning Letter | Regulus

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Research materialsPipeline and Hazardous Materials Safety AdministrationPipeline safetyPhmsa EnforcementCase 320053001WCPF 320053001W

Enforcementhistorical

CPF 320053001W

NORTHERN NATURAL GAS CO — Warning Letter

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Pipeline and Hazardous Materials Safety AdministrationOfficial agency material

2 passages

Warning Letter involving NORTHERN NATURAL GAS CO. PHMSA's enforcement data identifies the cited regulations as 193.2017, 193.2521. The case was opened on 2005-03-11 and is reported as closed as of 2005-03-11. Open the official case record for notices, responses, orders, and the latest status.

PHMSA lists no public case documents for this record.

This material provides agency context. It does not replace binding regulatory text, and its legal effect depends on the underlying authority and facts.

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Retrieved: Aug 20, 2026
Version: Source current

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