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Natural Gas Transmission, Chehalis, Washington. NPDES permit WA0040827, in force until Apr 30, 2031. Last 12 months: no values over a limit, 27 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | daily maximum | report only (deg C) (alert, not enforceable) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) (alert, not enforceable) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) (alert, not enforceable) | all year | 001 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) (alert, not enforceable) | all year | 001 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) (alert, not enforceable) | all year | 001 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) (alert, not enforceable) | all year | 001 |
| Turbidity | single reading | report only (NTU) (alert, not enforceable) | all year | 001 |
| Turbidity | single reading | report only (NTU) (alert, not enforceable) | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Chloride [as Cl] | single reading | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Chloride [as Cl] | single reading | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Benzene | single reading | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Benzene | single reading | report only (ug/L) (alert, not enforceable) | all year | 001 |
| Solids, total dissolved | single reading | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Solids, total dissolved | single reading | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Flow | monthly average | report only (gal/d) (alert, not enforceable) | all year | 001 |
| Flow | monthly average | report only (gal/d) (alert, not enforceable) | all year | 001 |
| Turbidity | single reading | report only (NTU) (alert, not enforceable) | all year | 002 |
| Color [PT-CO units] | single reading | report only (col unit (pc)) (alert, not enforceable) | all year | 002 |
| Conductivity | single reading | report only (umho/cm) (alert, not enforceable) | all year | 002 |
| pH | daily minimum | ≥ 6 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| Alkalinity, total [as CaCO3] | single reading | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Nitrogen, nitrate total [as N] | single reading | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Cyanide, total [as CN] | single reading | report only (ug/L) (alert, not enforceable) | all year | 002 |
| Hardness, total [as CaCO3] | single reading | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Calcium, total [as Ca] | single reading | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Magnesium, total [as Mg] | single reading | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Sodium, total [as Na] | single reading | report only (ug/L) (alert, not enforceable) | all year | 002 |
| Potassium, total [as K] | single reading | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Chloride [as Cl] | single reading | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Sulfate, total [as SO4] | single reading | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Fluoride, total [as F] | single reading | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Silica, total [as SiO2] | single reading | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Arsenic, total [as As] | single reading | report only (ug/L) (alert, not enforceable) | all year | 002 |
| Beryllium, total [as Be] | single reading | report only (ug/L) (alert, not enforceable) | all year | 002 |
| Cadmium, total [as Cd] | single reading | report only (ug/L) (alert, not enforceable) | all year | 002 |
| Chromium, total [as Cr] | single reading | report only (ug/L) (alert, not enforceable) | all year | 002 |
| Copper, total [as Cu] | single reading | report only (ug/L) (alert, not enforceable) | all year | 002 |
| Iron, total [as Fe] | single reading | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Lead, total [as Pb] | single reading | report only (ug/L) (alert, not enforceable) | all year | 002 |
| Manganese, total [as Mn] | single reading | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Thallium, total [as Tl] | single reading | report only (ug/L) (alert, not enforceable) | all year | 002 |
| Nickel, total [as Ni] | single reading | report only (ug/L) (alert, not enforceable) | all year | 002 |
| Silver, total [as Ag] | single reading | report only (ug/L) (alert, not enforceable) | all year | 002 |
| Zinc, total [as Zn] | single reading | report only (ug/L) (alert, not enforceable) | all year | 002 |
| Antimony, total [as Sb] | single reading | report only (ug/L) (alert, not enforceable) | all year | 002 |
| Aluminum, total [as Al] | single reading | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Selenium, total [as Se] | single reading | report only (ug/L) (alert, not enforceable) | all year | 002 |
| Chromium, hexavalent dissolved [as Cr] | single reading | report only (ug/L) (alert, not enforceable) | all year | 002 |
| Benzene, ethylbenzene, toluene, xylene combination | single reading | report only (ug/L) (alert, not enforceable) | all year | 002 |
| Phenolics, total | single reading | report only (ug/L) (alert, not enforceable) | all year | 002 |
| Pressure in annulus of waste inject well | maximum | report only (lbf/in) (alert, not enforceable) | all year | 002 |
| Flow, total | monthly average | report only (gal) (alert, not enforceable) | all year | 002 |
| Pressure, casing | daily maximum | ≤ 800 lbf/in | all year | 002 |
| Solids, total dissolved | single reading | report only (mg/L) (alert, not enforceable) | all year | 002 |
| Mercury, total [as Hg] | single reading | report only (ng/L) (alert, not enforceable) | all year | 002 |
| Pressure, bottom-at well bottom | maximum | report only (lbf/in) (alert, not enforceable) | all year | 002 |
| Conductivity | single reading | report only (umho/cm) (alert, not enforceable) | all year | 003 |
| pH | maximum | report only (SU) (alert, not enforceable) | all year | 003 |
| pH | minimum | report only (SU) (alert, not enforceable) | all year | 003 |
| Sodium, total [as Na] | single reading | report only (mg/L) (alert, not enforceable) | all year | 003 |
| Chloride [as Cl] | single reading | report only (mg/L) (alert, not enforceable) | all year | 003 |
| Benzene, ethylbenzene, toluene, xylene combination | single reading | report only (ug/L) (alert, not enforceable) | all year | 003 |
| Solids, total dissolved | single reading | report only (mg/L) (alert, not enforceable) | all year | 003 |
| Conductivity | single reading | report only (umho/cm) (alert, not enforceable) | all year | 004 |
| pH | maximum | report only (SU) (alert, not enforceable) | all year | 004 |
| pH | minimum | report only (SU) (alert, not enforceable) | all year | 004 |
| Sodium, total [as Na] | single reading | report only (mg/L) (alert, not enforceable) | all year | 004 |
| Chloride [as Cl] | single reading | report only (mg/L) (alert, not enforceable) | all year | 004 |
| Benzene, ethylbenzene, toluene, xylene combination | single reading | report only (ug/L) (alert, not enforceable) | all year | 004 |
| Solids, total dissolved | single reading | report only (mg/L) (alert, not enforceable) | all year | 004 |
| Conductivity | single reading | report only (umho/cm) (alert, not enforceable) | all year | 005 |
| pH | maximum | report only (SU) (alert, not enforceable) | all year | 005 |
| pH | minimum | report only (SU) (alert, not enforceable) | all year | 005 |
| Sodium, total [as Na] | single reading | report only (mg/L) (alert, not enforceable) | all year | 005 |
| Chloride [as Cl] | single reading | report only (mg/L) (alert, not enforceable) | all year | 005 |
| Solids, total dissolved | single reading | report only (mg/L) (alert, not enforceable) | all year | 005 |
Cited limits by parameter: Washington's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/WA0040827 · MCP: https://passage-data.com/mcp