| SULWHANON | SVERSON | 150 | 0.0600 mg/L |
| RICHMOND TOTTEN | | 42 | 0.0597 mg/L |
| PINE COVE RV PARK | | 223 | 0.0544 mg/L |
| CARBONADO WATER DEPT | | 875 | 0.0528 mg/L |
| PLACE EIGHTEEN HOA | | 34 | 0.0470 mg/L |
| RIVERSIDE VILLA | | 120 | 0.0459 mg/L |
| CEDAR GLEN MOBILE HOME PARK | | 284 | 0.0419 mg/L |
| COTTONWOOD MHP | | 60 | 0.0392 mg/L |
| Goss Lakeridge Acres Association | | 27 | 0.0389 mg/L |
| HOH TRIBE | FORKS | 120 | 0.0386 mg/L |
| STANWOOD WATER DEPT CITY OF | | 17,586 | 0.0360 mg/L |
| NORTHSHORE UTILITY DISTRICT | | 99,789 | 0.0353 mg/L |
| RUTSATZ ROAD | DEMING | 150 | 0.0351 mg/L |
| SNOWBLAZE | | 121 | 0.0350 mg/L |
| CHIPPEWA WATER DISTRICT | | 185 | 0.0349 mg/L |
| RIVER RIDGE ESTATES | | 77 | 0.0339 mg/L |
| HAYNES ACRES DIVISION 1 | | 74 | 0.0324 mg/L |
| SPENCER GLEN | | 55 | 0.0323 mg/L |
| RICH ACRES WATER CORP | | 30 | 0.0315 mg/L |
| LAKE MARGARET WATER SYSTEM | | 406 | 0.0300 mg/L |
| SANTIAGO WATER ASSOCIATION | MOCLIPS | 95 | 0.0294 mg/L |
| ALDERWOOD WATER DISTRICT | | 245,715 | 0.0280 mg/L |
| WOODGLEN PRD WATER SYSTEM | | 40 | 0.0274 mg/L |
| SKAMANIA LANDING OWNERS ASSN | | 132 | 0.0270 mg/L |
| MOUNT BAKER MOBILE HOME PARK | | 87 | 0.0261 mg/L |
| LOCLOMAN SUBDIVISION | | 174 | 0.0260 mg/L |
| KITSAP WEST MHC WATER CO | | 190 | 0.0260 mg/L |
| QUEETS | TAHOLA | 200 | 0.0257 mg/L |
| LAKE PLEASANT MOBILE HOME & RV PARK | | 66 | 0.0248 mg/L |
| VISTA BY THE SEA | | 50 | 0.0245 mg/L |
| RHODODENDRON HEIGHTS WATER CO | | 78 | 0.0240 mg/L |
| LISECC | | 357 | 0.0232 mg/L |
| SAMISH FARMS WATER ASSN | | 1,017 | 0.0230 mg/L |
| PORT SUSAN CAMP CLUB #2 | MARYSVILLE | 1,000 | 0.0230 mg/L |
| DRIFTWOOD VALLEY ASSOC (DVA) | | 151 | 0.0230 mg/L |
| MAPLE HILL PARK | | 35 | 0.0228 mg/L |
| BIG BEND LANDOWNERS ASSOCIATION | | 419 | 0.0225 mg/L |
| NAVAL BASE KITSAP AT BANGOR | | 16,828 | 0.0214 mg/L |
| BUCKLEY WATER | | 7,842 | 0.0214 mg/L |
| BELFERN WEST | | 60 | 0.0213 mg/L |
| IONE WATER DEPT | | 2,395 | 0.0212 mg/L |
| OLGA WATER USERS INC | | 392 | 0.0210 mg/L |
| LAKERIDGE WATER CO | | 120 | 0.0210 mg/L |
| WHISPERING CEDARS | DEMING | 25 | 0.0209 mg/L |
| Prairie Village Mobile Home Court | | 40 | 0.0207 mg/L |
| Cole Point Association | | 37 | 0.0204 mg/L |
| ROCHE HARBOR WATER SYSTEM INC | | 2,091 | 0.0202 mg/L |
| UNIONTOWN WATER WORKS | | 366 | 0.0202 mg/L |
| ECHO GLEN WATER SYSTEM | | 105 | 0.0200 mg/L |
| ROSLYN CITY OF | | 2,099 | 0.0200 mg/L |
| 5 CEDARS | DEMING | 150 | 0.0193 mg/L |
| RAINIER SCHOOL | | 556 | 0.0190 mg/L |
| CAMPO HACIENDA | | 123 | 0.0190 mg/L |
| REDTAIL HAWK 616 | | 75 | 0.0190 mg/L |
| ISLAND VIEW LUD 9 | | 70 | 0.0190 mg/L |
| ALPINE WATER DISTRICT | | 2,255 | 0.0189 mg/L |
| OLYMPIC VIEW WATER & SEWER DISTRICT | | 17,784 | 0.0188 mg/L |
| BUCKLIN | | 402 | 0.0188 mg/L |
| PARKWOOD APARTMENTS | | 60 | 0.0188 mg/L |
| MAY VOLT HILLS | | 106 | 0.0186 mg/L |
| CURLEW WATER & SEWER DISTRICT | | 316 | 0.0186 mg/L |
| CEDAR PARK | | 53 | 0.0184 mg/L |
| SNO PUD 1 - SUNDAY LAKE | | 561 | 0.0180 mg/L |
| OYSTERVILLE WATER | | 72 | 0.0180 mg/L |
| VOSPER PLACE SUBDIVISION | | 68 | 0.0179 mg/L |
| RED GATE MOBILE HOME PARK | | 25 | 0.0178 mg/L |
| MADRONA POINT | | 111 | 0.0177 mg/L |
| South Bend Water Department | | 2,930 | 0.0176 mg/L |
| WASHINGTON SOLDIERS HOME COLONY | | 643 | 0.0175 mg/L |
| JOHANSON | | 148 | 0.0175 mg/L |
| SKY MEADOWS RANCH COUNTRY CLUB WTR | | 98 | 0.0174 mg/L |
| VINLAND | | 4,801 | 0.0172 mg/L |
| MAKAH NEAH BAY | NEAH BAY | 1,300 | 0.0171 mg/L |
| SUNNYSLOPE MUTUAL WATER SYSTEM | | 85 | 0.0171 mg/L |
| EASTERN WASHINGTON UNIVERSITY | | 17,108 | 0.0170 mg/L |
| PATTONS RETREAT WATER ASSN | | 90 | 0.0168 mg/L |
| ARLINGTON CITY OF | | 29,508 | 0.0166 mg/L |
| PORT SUSAN CAMP CLUB #3 | MARYSVILLE | 1,000 | 0.0166 mg/L |
| ABERDEEN CITY OF | | 22,867 | 0.0165 mg/L |
| MEADOW RIDGE | | 175 | 0.0165 mg/L |
| EATONVILLE WATER DEPT | | 3,945 | 0.0164 mg/L |
| LAUREL WEST WATER ASSOCIATION | | 45 | 0.0164 mg/L |
| PRESCOTT TOWN OF | | 522 | 0.0163 mg/L |
| BELLINGHAM-WATER DIVISION CITY OF | | 141,127 | 0.0162 mg/L |
| Ocosta Mobile Home Park LLC | | 26 | 0.0161 mg/L |
| OLYMPIC TRAILS WATER SUPPLY | | 44 | 0.0161 mg/L |
| MUCKLESHOOT | AUBURN | 3,250 | 0.0160 mg/L |
| Eloika Pines LLC | | 87 | 0.0160 mg/L |
| TACOMA WATER DIVISION CITY OF | | 446,170 | 0.0159 mg/L |
| ILWACO WATER DEPARTMENT CITY OF | | 2,757 | 0.0159 mg/L |
| CAMANO CO-OP WATER & POWER CO | | 1,071 | 0.0158 mg/L |
| DUGUALLA COMMUNITY INC | | 459 | 0.0158 mg/L |
| LYNCH COVE DIV 1 WATER ASSN | | 102 | 0.0158 mg/L |
| MOUNTAIN VIEW ASSOCIATION | | 60 | 0.0156 mg/L |
| DIABLO WTR SYS-SEATTLE CITY LIGHT | | 53 | 0.0155 mg/L |
| NORTH BONNEVILLE CITY OF | | 1,048 | 0.0155 mg/L |
| EASTSOUND WATER USERS ASSOCIATION | | 3,711 | 0.0155 mg/L |
| LARCH CORRECTIONS CENTER | | 705 | 0.0155 mg/L |
| WOODLAND MHC LLC | | 209 | 0.0154 mg/L |
| KELLEY CREST | | 45 | 0.0154 mg/L |