We found 109 public water systems that could serve the same population as Williams Township (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Bay City, City Of | Bay City | 34,932 | 28 | 4 |
| Delta College | County of Bay | 20,550 | 0 | 0 |
| Bangor Township | Bay City | 12,688 | 31 | 0 |
| Hampton Township | County of Bay | 9,652 | 31 | 1 |
| Bay Co. Dept Of Water & Sewer | County of Bay | 8,428 | 0 | 0 |
| Monitor Township | County of Bay | 4,977 | 2 | 0 |
| Essexville, City Of | Essexville | 3,478 | 0 | 0 |
| Frankenlust Township | County of Bay | 3,422 | 0 | 0 |
| Bangor-monitor Metro District | County of Bay | 2,971 | 0 | 2 |
| Kawkawlin Township | Bay City | 2,961 | 28 | 0 |
| Auburn | Auburn | 2,087 | 0 | 0 |
| Kawkawlin Metro Dist Water Sup | County of Bay | 1,480 | 0 | 0 |
| Pinconning Township | County of Bay | 1,376 | 0 | 1 |
| Merritt Township | County of Bay | 1,373 | 0 | 1 |
| Pinconning, City Of | Pinconning | 1,307 | 0 | 4 |
| Fraser Township | County of Bay | 1,140 | 0 | 0 |
| Beaver Township | Bay City | 1,109 | 0 | 6 |
| Linwood Metropolitan District | County of Bay | 909 | 0 | 11 |
| Goetz Water Company | County of Bay | 875 | 0 | 0 |
| Mcdonald's Pinconning | County of Bay | 850 | 0 | 0 |
| M.d.o.t.- Linwood, R626 | County of Bay | 800 | 0 | 0 |
| Beaver Road Area Water Assoc. | County of Bay | 786 | 0 | 5 |
| Portsmouth Township | Bay City | 525 | 41 | 4 |
| Maple Leaf Golf Course Inc | County of Bay | 300 | 0 | 0 |
| Pleasant Acres Estates Office | County of Bay | 243 | 0 | 0 |
| Kawkawlin Twp Hall | County of Bay | 200 | 0 | 0 |
| Charbonneau's Hall | County of Bay | 200 | 0 | 0 |
| Shari At The Willard Hilton | County of Bay | 200 | 0 | 0 |
| White Birch Hills Golf | County of Bay | 200 | 0 | 0 |
| Garfield Water Association | County of Bay | 190 | 0 | 0 |
| U S 23 Camp | County of Bay | 177 | 0 | 0 |
| Fraser Township Hall | County of Bay | 175 | 0 | 0 |
| Pinconning Family Dining | County of Bay | 150 | 0 | 0 |
| Village Camp 09-0091 | County of Bay | 148 | 0 | 0 |
| John Adams School | County of Bay | 140 | 0 | 0 |
| Arn Station Camp Inc. | County of Bay | 136 | 0 | 0 |
| Monitor Camp Number 2 | County of Bay | 136 | 0 | 0 |
| Antron High-q | County of Bay | 130 | 0 | 0 |
| Green Hills Golf Course Inc | County of Bay | 125 | 0 | 0 |
| Clark Enterprises Of Midland | Midland | 100 | 0 | 0 |
| Pinny Lanes | Pinconning | 100 | 0 | 0 |
| Bay City Country Club | County of Bay | 100 | 0 | 0 |
| Lutheran Fellowship Hall-new | County of Bay | 100 | 0 | 0 |
| Linwood City Dairy | County of Bay | 100 | 0 | 0 |
| D A V Chapter 110 | County of Bay | 100 | 0 | 0 |
| Lutheran Fellowship Hall-old | County of Bay | 100 | 0 | 0 |
| Sportsman Bar | County of Bay | 100 | 0 | 0 |
| Cheese House Deli North Well | County of Bay | 100 | 0 | 0 |
| Dore's Party Store | County of Bay | 100 | 0 | 0 |
| Garfield-fraser Elementary | County of Bay | 100 | 0 | 0 |
| Twin Oaks Golf Course | County of Bay | 100 | 0 | 0 |
| ZION LUTHERAN SCHOOL | County of Bay | 90 | 0 | 0 |
| Hribek Camp #3 | County of Bay | 87 | 0 | 0 |
| Guerra Camp | County of Bay | 86 | 0 | 0 |
| St Valentine School | County of Bay | 85 | 0 | 0 |
| The Tipsy Cowboy | Pinconning | 80 | 0 | 0 |
| Van Tol Camp | County of Bay | 75 | 0 | 0 |
| Matthews Camp Number 1 | County of Bay | 75 | 0 | 0 |
| Mike Resmer | County of Bay | 70 | 0 | 0 |
| Nine Mile Camp 09-0058 | County of Bay | 68 | 0 | 0 |
| Kitchen Road Sch Cmp 09-0050 | County of Bay | 68 | 0 | 0 |
| Mt Forest Camp | County of Bay | 60 | 0 | 0 |
| Mt Forest Township Hall | Pinconning | 55 | 0 | 0 |
| D's Corner Market, Llc | Linwood | 50 | 0 | 0 |
| Crump Pump | Linwood | 50 | 0 | 0 |
| Duel Bar | Midland | 50 | 0 | 0 |
| Cottage Grove School | County of Bay | 48 | 0 | 0 |
| Lone Star/s Carruthers 09-0014 | County of Bay | 46 | 0 | 0 |
| Bay City Public Well | County of Bay | 45 | 0 | 0 |
| Bay Shore Farms 09-0003 | County of Bay | 45 | 0 | 0 |
| WOODS CAMP 09-0007 | County of Bay | 42 | 0 | 0 |
| Lahar Brother Camp | County of Bay | 42 | 0 | 0 |
| Bentley Bar | Bentley | 40 | 0 | 0 |
| Silver Derby Bar, Inc | Linwood | 40 | 0 | 0 |
| Mckeon Camp | County of Bay | 40 | 0 | 0 |
| Fraser Camp | County of Bay | 40 | 0 | 0 |
| Kitchen Road Camp | Pinconning | 30 | 0 | 0 |
| Big Adventures Day Care Center | Pinconning | 30 | 0 | 0 |
| Garfield Road Camp | County of Bay | 30 | 0 | 0 |
| Professional Assisted Living Facility | Auburn | 30 | 0 | 0 |
| Bergers Country Store | County of Bay | 30 | 0 | 0 |
| Lisius Camp | County of Bay | 30 | 0 | 0 |
| Hoyle Marina | County of Bay | 30 | 0 | 0 |
| Salas Camp Number One | County of Bay | 30 | 0 | 0 |
| Garfield Camp | County of Bay | 30 | 0 | 0 |
| Karbowski Implement Co | County of Bay | 30 | 0 | 0 |
| Dewyse Brothers Camp | County of Bay | 28 | 0 | 0 |
| WORTH CAMP | County of Bay | 28 | 0 | 0 |
| Dj's Country Store | Sterling | 25 | 0 | 0 |
| Mudhen Espresso | Bay City | 25 | 0 | 0 |
| Kundinger Bill Chevrolet | County of Bay | 25 | 0 | 0 |
| Bartolo Camp | County of Bay | 25 | 0 | 0 |
| St John's Lutheran Church | County of Bay | 25 | 0 | 0 |
| Pinconning Medical Clinic | County of Bay | 25 | 0 | 0 |
| St. Valentine's Catholic Churc | County of Bay | 25 | 0 | 0 |
| Wm Mueller And Son Inc | County of Bay | 25 | 0 | 0 |
| Floyd J Podgorniak | County of Bay | 25 | 0 | 0 |
| Beaver Community Hall | County of Bay | 25 | 0 | 0 |
| Blizzard Hills Marina | Pinconning | 25 | 0 | 0 |
| Pinconning Express Stop | Pinconning | 25 | 0 | 0 |
| Linwood Sportsmans Club | County of Bay | 25 | 0 | 0 |
| Valentines Bar & Lounge | County of Bay | 25 | 0 | 0 |
| Ratkos Camp | County of Bay | 25 | 0 | 0 |
| ZIELINSKI CAMP | County of Bay | 25 | 0 | 0 |
| French Town Camp | County of Bay | 25 | 0 | 0 |
| White Feather Camp | County of Bay | 25 | 0 | 0 |
| Fedak Camp | County of Bay | 25 | 0 | 0 |
| Gibson Twp Park | County of Bay | 24 | 0 | 0 |
| Bay Area Water System | Bay City | 0 | 0 | 0 |