| Property owner | Site address | Classification |
| IACOPI, EUGENE & IACOPI, ANITA | 294 BANNISTER LN | High |
| ICE, CARL F & ICE, BARBARA I | 3099 REDWOOD AVE | Extreme |
| ICE, DOUGLAS C & SANDRA L | 1765 DARRELL CIR | High |
| ICENHOWER LIVING TRUST, R W & D C ICENHOWER, RICHARD W & ICENHOWER, DOROTHY C TRUSTEES | 10500 LOWER RIVER RD | Extreme |
| IDAHO AND OREGON RIVER JOURNEYS LLC | 115 HOGUE DR | Extreme |
| IDAHO GENERAL MINES INC C/O ACCOUNTS PAYABLE | 33095 REDWOOD HWY | Extreme |
| IDING TRUST, JOHN F IDING, JOHN TRUSTEE | 660 CRYSTAL DR | Extreme |
| IDING TRUST, JOHN F IDING, JOHN TRUSTEE | 503 STONERIDGE DR | Extreme |
| IKEL, ARNOLD D & IKEL, LINDA L | WALKER RD | Extreme |
| IKEL, ARNOLD D & IKEL, LINDA L | 344 PONDEROSA LN | Extreme |
| IKEL, ARNOLD D & IKEL, LINDA L | WALKER RD | Extreme |
| ILCHUK, NORRENE LUCILLE (LE) ILCHUK, GORDON & ILCHUK, JAMES | 1616 AZALEA DR | Extreme |
| ILLIA, ROBERT J | 110 KOLKANA WAY | High |
| ILLINGWORTH LOVING TRUST ILLINGWORTH, RICHARD Y TRUSTEE | 1020 SOLDIER CREEK RD | Extreme |
| ILLINOIS VALLEY FIRE DEPT | 10 LONE MOUNTAIN RD | Extreme |
| ILLINOIS VALLEY FIRE DISTR | 8399 TAKILMA RD | Extreme |
| ILLINOIS VALLEY GRANGE | 3763 HOLLAND LOOP RD | High |
| ILLINOIS VALLEY HOUSING LLC | 336 KERBY AVE | High |
| ILLINOIS VALLEY HOUSING LLC | 338 KERBY AVE | High |
| ILLINOIS VALLEY INVESTMENTS LLC | 300 OAK DR | Extreme |
| ILLINOIS VALLEY MEDICAL CENTER | 319 CAVES HWY | Extreme |
| ILLINOIS VALLEY MEDICAL CENTER INC | CAVES HWY | Extreme |
| ILLINOIS VALLEY MEDICAL CENTER INC | 329 CAVES HWY | Extreme |
| ILLINOIS VALLEY MEDICAL CENTER INC | 344 WELLS DR | Extreme |
| ILLINOIS VALLEY MEDICAL CENTER INC | 343 WELLS DR | Extreme |
| ILLINOIS VALLEY PRAISE CENTER | 28569 REDWOOD HWY | Extreme |
| ILLINOIS VALLEY RANCH LLC | 2612 HOLLAND LOOP RD | High |
| ILLINOIS VALLEY RURAL FIRE PATROL DTR | LAKE SHORE DR | High |
| ILLINOIS VALLEY RURAL FIRE PROT DIST | 5465 HOLLAND LOOP RD | High |
| ILLINOIS VALLEY RURAL FIRE PROT DIST | 5497 HOLLAND LOOP RD | High |
| ILLINOIS VALLEY RURAL FIRE PROT DIST | DICK GEORGE RD | High |
| ILLINOIS VALLEY RURAL FIRE PROTECTION D | 18455 REDWOOD HWY | Extreme |
| ILLINOIS VALLEY RURAL FIRE PROTECTION D | 681 CAVES HWY | Extreme |
| ILTEN, STEVE & ILTEN, DANIELLE | 222 GARY LN | Extreme |
| IMEL, MICHAEL J & IMEL, NAOMI S | 510 BELLEWOOD DR | Extreme |
| IMERTI, JOHN & IMERTI, WENDY | 30441 REDWOOD HWY | Extreme |
| IMRIE, EDGAR A & IMRIE, BARBARA R | 243 BURNETTE RD | High |
| INCARDONA, DON L & INCARDONA, FRANCES L | 460 FOREST GLEN DR | Extreme |
| INDIAN HEAD COMPANY | 7251 HOLLAND LOOP RD | High |
| INDIAN HILL LLC | GREENBACK MINE RD | Extreme |
| INDIAN HILL LLC | TECH WAY | Extreme |
| INDIAN HILL LLC | TECH WAY | Extreme |
| INDIAN HILL LLC | 200 CORPORATE WAY | Extreme |
| INDIAN HILL LLC | REDWOOD HWY | Extreme |
| INDIAN HILL LLC | REDWOOD HWY | Extreme |
| INDIAN HILL LLC | REDWOOD HWY | Extreme |
| INGALLS, DENNIS E & INGALLS, ANNE L | 746 INGALLS LN | Extreme |
| INGELS REV LIV TRUST, LYLE D & JEAN STR INGELS, JEAN STROH TRUSTEE | 3165 RIVERBANKS RD | Extreme |
| INGERSOLL FAMILY TRUST INGERSOLL, LOYAL JR & INGERSOLL, MARY JANE TRUSTEES | 224 CORNETT LN | Extreme |
| INGLE, BARBARA J | 470 MADRONA DR | Extreme |
| INGLE, GEORGE R & INGLE, CHARLOTTE M | 223 RED MOUNTAIN DR | High |
| INGRAHAM, DONNA SUE | 705 RANCHO VISTA DR | Extreme |
| INGRAM 2004 FAMILY TRUST INGRAM, WESLEY IRWIN & INGRAM, DONNA-RAE JOSEPHINE TRUSTEES | 129 HOGUE DR | Extreme |
| INGRAM 2004 FAMILY TRUST INGRAM, WESLEY IRWIN & INGRAM, DONNA-RAE JOSEPHINE TRUSTEES | LAKE SHORE DR | Extreme |
| INGRAM FAMILY TRUST INGRAM, CRAIG EDWIN & INGRAM, PATRICIA ANNE TRUSTEES | HUGO RD | High |
| INGRAM FAMILY TRUST INGRAM, CRAIG EDWIN & INGRAM, PATRICIA ANNE TRUSTEES | 2452 HUGO RD | High |
| INGRAM, CHRIS J | 5830 RIVERBANKS RD | Extreme |
| INGRAM, DENNIS & JACKSON, ROBERTA | 3860 HIGHLAND AVE | Extreme |
| INGRAM, GARY | 240 WHITE FIR DR | Extreme |
| INGRAM, ROBERTA JACKSON | 368 RIESSEN RD | Extreme |
| INGRAM, WILLIAM & INGRAM, PAMELA | 5323 JEROME PRAIRIE RD | High |
| INGVALDSON, WILLIAM J & INGVALDSON, KIM K | 1020 NW STARLITE PL | High |
| INKROTE TRUST, HELEN M INKROTE, HELEN M TRUSTEE | 2487 SCOVILLE RD | Extreme |
| INKROTE TRUST, HELEN M INKROTE, HELEN M TRUSTEE | 2491 SCOVILLE RD | Extreme |
| INKROTE, LORI L | 1456 E JONES CREEK RD | Extreme |
| INMAN, GENE & INMAN, PAMELA N | 395 CANAAN ST | Extreme |
| INMAN, LORNA L | 230 LIVINGSTON WAY | Extreme |
| INMAN, MARCIA | N SCHOOL HOUSE CREEK RD | Extreme |
| INNES, JACK W & INNES, RAGNVI R | 250 IRIS LN | Extreme |
| INNIS, EVELYN L | 166 HOGUE DR | Extreme |
| INTEGRATED CAPITAL VENTURES LLC C/O WILLIAM DALE SMITH JR | 149 CURTIS DR | High |
| INTIHAR, JOHN DAVID & INTIHAR, JUANITA F | 512 BOARD SHANTY CREEK RD | Extreme |
| INTRAVARTOLO LIV TRUST INTRAVARTOLO, PAUL V & INTRAVARTOLO, JULIA TRUSTEES | 5461 RIVERBANKS RD | Extreme |
| INTRAVARTOLO LIV TRUST INTRAVARTOLO, PAUL V & INTRAVARTOLO, JULIA TRUSTEES | 5545 RIVERBANKS RD | Extreme |
| IRBY TRUST, GLENN J & ELIZABETH M IRBY, ELIZABETH M TRUSTEE | 453 PENNY LN | Extreme |
| IRELAND FAMILY TRUST & IRELAND, JAMES TRUSTEE & IRELAND, CAROLYN J TRUSTEE | 214 VALLEY ROGUE WAY | Extreme |
| IRISH, ELIZABETH & IRISH, MATTHEW & PLANTE, JULIA | 1517 FRUITDALE DR | High |
| IRISH, JEFFREY G & IRISH, KATHLEEN G | 531 CEDAR FLAT RD | High |
| IRONS, SYLVIANNE | N OLD STAGE RD | Extreme |
| IRONSIDE, DALE ALAN & IRONSIDE, CRYSTAL LYNN | 375 CONNIE LN | Extreme |
| IRONWOOD ESTATES LLC | 255 SMOKEY LN | Extreme |
| IRVING, KENNETH P JR & IRVING, MARILYN | 100 OLD HWY 99 | Extreme |
| IRVING, KENNETH R & LOVE, ENDORA KAY | 205 FOREST LN | Extreme |
| IRVING, KENNETH RICHARD | 6070 HUGO RD | Extreme |
| ISABELL, CHRIS & ISABELL, JODI | 303 NE SCENIC DR | Extreme |
| ISBELL, SARAH AUDREY | 198 W WOODSIDE ST | Extreme |
| ISBLE, DON JAMES & ISBLE, KATHLEEN M | 291 DALEO DR | Extreme |
| ISENAGLE, AARON C | RIDGE VISTA DR | Extreme |
| ISENAGLE, JOSHUA NOAH LEA | 370 BEAVER MEADOW RD | Extreme |
| ISENAGLE, PETER W & ISENAGLE, SHEILA L | 770 RIDGE VISTA DR | Extreme |
| ISHAM, HARVEY R & ISHAM, PATRICIA J TRUSTEES | 282 HORNET LN | Extreme |
| ISLANDER TRUST, MARGARET E ISLANDER, MARGARET E TRUSTEE | 2265 SCOVILLE RD | Extreme |
| ISMAILI, KAMRON BRETT & CLARK-RUST, HELEN KRISTINE | 7000 TAKILMA RD | Extreme |
| ISON, MICHAEL DWAIN & ISON, DEBBIE A | 364 MURPHY CREEK RD | Extreme |
| IVERSEN, SCOTT M & IVERSEN, SHEILA R | 311 HARPER LOOP | Extreme |
| IVERSON, DOUGLAS W & IVERSON, DARLENE A | 722 SCOTT DR | Extreme |
| IVERSON, FRANK & IVERSON, HEIDI | 500 WILDROSE LN | Extreme |
| IVERSON, LEONARD & IVERSON, GLORIA | 4776 REDWOOD AVE | Extreme |
| IVERSON, STEVEN L & IVERSON, SANDRA L | 190 MINA LN | Extreme |
| IVES, GRACE M (LE) IVES, RONALD G & RODGERS, CHARLENE | 422 JEANNIE WAY | Extreme |
| IVESON, E O & IVESON, HAZEL J TRUSTEES | 162 HOGUE DR | Extreme |
| IVEY, SHIRLAND R | 4008 FOOTHILL BLVD | High |
| IVEY, SHIRLAND R | 4004 FOOTHILL BLVD | High |
| IVIE, DAVID LYNN & IVIE, JEANETTE M | 462 BOYER RD | High |
| IVIE, SHONNAH JOY | 780 HITCHING POST RD | Extreme |
| IVORY, EDWARD ALLEN & IVORY, EDITH LOUISE | 212 OXYOKE RD | High |
| IVY, DALE HENRY & IVY, JACKIE E | 1646 LONNON RD | Extreme |
| IVY, HEATHER & IVY, CASEY | 350 E GLENWOOD ST | Extreme |
| IVY, HENRY J & IVY, VIRGINIA A | 315 LARKIN RD | Extreme |