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Grant PUD @ Wanapum/Priest

Industrial or other facility, Mattawa, Washington. NPDES permit WA0991029, in force until Aug 31, 2027. Last 12 months: no values over a limit, 2 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall EFF form 01 monthly (5 values), outfall EFF form 02 monthly (7 values), outfall EFF form 03 monthly (5 values), outfall EFF form 04 monthly (5 values), outfall EFF form 05 monthly (5 values), outfall EFF form 06 monthly (5 values), and 10 more forms
Renewal application due
Mar 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 2 required values missing, 0 of 163 reports late

Limits in force (114)

ParameterStatisticLimitMonthsOutfall
Cyanide, weak acid, dissociablesingle readingreport only (ug/L) (alert, not enforceable)all yearANNU
Cyanide, weak acid, dissociablesingle readingreport only (ug/L) (alert, not enforceable)all yearANNU
Cyanide, total [as CN]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Cyanide, total [as CN]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Cyanide, free [amenable to chlorination]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Cyanide, free [amenable to chlorination]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Arsenic, total [as As]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Arsenic, total [as As]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Beryllium, total [as Be]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Beryllium, total [as Be]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Cadmium, total [as Cd]single readingreport only (mg/L) (alert, not enforceable)all yearANNU
Cadmium, total [as Cd]single readingreport only (mg/L) (alert, not enforceable)all yearANNU
Chromium, total [as Cr]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Chromium, total [as Cr]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Copper, total [as Cu]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Copper, total [as Cu]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Lead, total [as Pb]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Lead, total [as Pb]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Thallium, total [as Tl]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Thallium, total [as Tl]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Nickel, total [as Ni]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Nickel, total [as Ni]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Silver, total [as Ag]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Silver, total [as Ag]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Zinc, total [as Zn]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Zinc, total [as Zn]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Antimony, total [as Sb]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Antimony, total [as Sb]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Selenium, total [as Se]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Selenium, total [as Se]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Chromium, hexavalent dissolved [as Cr]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Chromium, hexavalent dissolved [as Cr]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Total phenolssingle readingreport only (mg/L) (alert, not enforceable)all yearANNU
Total phenolssingle readingreport only (mg/L) (alert, not enforceable)all yearANNU
Phenolics, totalsingle readingreport only (mg/L) (alert, not enforceable)all yearANNU
Phenolics, totalsingle readingreport only (mg/L) (alert, not enforceable)all yearANNU
Polychlorinated biphenyls [PCBs]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Polychlorinated biphenyls [PCBs]single readingreport only (ug/L) (alert, not enforceable)all yearANNU
Mercury, total [as Hg]single readingreport only (ng/L) (alert, not enforceable)all yearANNU
Mercury, total [as Hg]single readingreport only (ng/L) (alert, not enforceable)all yearANNU
Temperature, water deg. centigradedaily averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily maximumreport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily maximumreport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily maximumreport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily maximumreport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily maximumreport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily maximumreport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily maximumreport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily maximumreport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily maximumreport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily maximumreport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily maximumreport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily maximumreport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradedaily maximumreport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradehighest 7-day averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradehighest 7-day averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradehighest 7-day averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradehighest 7-day averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradehighest 7-day averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradehighest 7-day averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradehighest 7-day averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradehighest 7-day averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradehighest 7-day averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradehighest 7-day averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradehighest 7-day averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradehighest 7-day averagereport only (deg C) (alert, not enforceable)all yearEFF
Temperature, water deg. centigradehighest 7-day averagereport only (deg C) (alert, not enforceable)all yearEFF
pHmaximum≤ 8.5 SUall yearEFF
pHmaximum≤ 8.5 SUall yearEFF
pHmaximum≤ 8.5 SUall yearEFF
pHminimum≥ 6.5 SUall yearEFF
pHminimum≥ 6.5 SUall yearEFF
pHminimum≥ 6.5 SUall yearEFF
Oil and grease [soxhlet extr.] tot.daily maximum≤ 5 mg/Lall yearEFF
Oil and grease [soxhlet extr.] tot.daily maximum≤ 5 mg/Lall yearEFF
Net rate of additionof heatmonthly averagereport only (mkcal/day) (alert, not enforceable)Jun–OctEFF
Net rate of additionof heatmonthly averagereport only (mkcal/day) (alert, not enforceable)Jun–OctEFF
Net rate of additionof heatmonthly averagereport only (mkcal/day) (alert, not enforceable)Jun–OctEFF
Net rate of additionof heatmonthly averagereport only (mkcal/day) (alert, not enforceable)Jun–OctEFF
Net rate of additionof heatmonthly averagereport only (mkcal/day) (alert, not enforceable)Jun–OctEFF
Net rate of additionof heatmonthly averagereport only (mkcal/day) (alert, not enforceable)Jun–OctEFF
Net rate of additionof heatmonthly averagereport only (mkcal/day) (alert, not enforceable)Jun–OctEFF
Net rate of additionof heatmonthly averagereport only (mkcal/day) (alert, not enforceable)Jun–OctEFF
Net rate of additionof heatmonthly averagereport only (mkcal/day) (alert, not enforceable)Jun–OctEFF
Net rate of additionof heatmonthly averagereport only (mkcal/day) (alert, not enforceable)Jun–OctEFF
Net rate of additionof heatmonthly averagereport only (mkcal/day) (alert, not enforceable)Jun–OctEFF
Net rate of additionof heatmonthly averagereport only (mkcal/day) (alert, not enforceable)Jun–OctEFF
Net rate of additionof heatmonthly averagereport only (mkcal/day) (alert, not enforceable)Jun–OctEFF
Net rate of additionof heatmonthly average≤ 3070 mkcal/dayJun–OctEFF
Flowmonthly averagereport only (MGD) (alert, not enforceable)all yearEFF
Flowmonthly averagereport only (MGD) (alert, not enforceable)all yearEFF
Flowmonthly averagereport only (MGD) (alert, not enforceable)all yearEFF
Flowmonthly averagereport only (MGD) (alert, not enforceable)all yearEFF
Flowmonthly averagereport only (MGD) (alert, not enforceable)all yearEFF
Flowmonthly averagereport only (MGD) (alert, not enforceable)all yearEFF
Flowmonthly averagereport only (MGD) (alert, not enforceable)all yearEFF
Flowmonthly averagereport only (MGD) (alert, not enforceable)all yearEFF
Flowmonthly averagereport only (MGD) (alert, not enforceable)all yearEFF
Flowmonthly averagereport only (MGD) (alert, not enforceable)all yearEFF
Flowmonthly averagereport only (MGD) (alert, not enforceable)all yearEFF
Flowmonthly averagereport only (MGD) (alert, not enforceable)all yearEFF
Flowmonthly averagereport only (MGD) (alert, not enforceable)all yearEFF

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WA0991029 · MCP: https://passage-data.com/mcp