WaterMark / Jurisdictions / Counties
County Water Impact Reference
One reference page per county in the assessment tool. Each carries the water utility and its treatment capacity, the HUC-8 basin with USGS consumptive use by category, grid water intensity for Scope 2, and current regulatory status, with a primary source on every figure. Facility-scale results are produced by the assessment tool; comparative scores are on the siting matrix.
AZ
| County | Water utility | Supply source | Watershed stress | Grid |
|---|---|---|---|---|
| Chandler, AZ | City of Chandler Water Services | Salt River Project / CAP / Reclaimed | High (3.9/5) | WECC Southwest |
| Mesa, AZ (Maricopa County) | City of Mesa Water Resources | Salt River Project / CAP (Colorado River) + groundwater | High (3.8/5) | WECC Southwest |
| Pima County, AZ (Tucson) | Tucson Water | Colorado River / Central AZ Project + Aquifer | Extremely High (4.2/5) | WECC Southwest |
| Pinal County, AZ (Casa Grande / Eloy) | Arizona Water Company (Pinal Valley) / CAP + groundwater | Groundwater + Central Arizona Project (Colorado River) — Pinal AMA | Extremely High (4.6/5) | WECC (Southwest) |
CA
| County | Water utility | Supply source | Watershed stress | Grid |
|---|---|---|---|---|
| Santa Clara County, CA (Silicon Valley) | Valley Water (SCVWD) / San Jose Water Company | Guadalupe / Coyote watersheds + imported State Water Project & groundwater | High (3.6/5) | WECC / CAISO (CA) |
GA
| County | Water utility | Supply source | Watershed stress | Grid |
|---|---|---|---|---|
| DeKalb County, GA | DeKalb County | Chattahoochee + reservoirs | High (3.8/5) | Southern (GA Power) |
| Fulton County, GA (Atlanta) | City of Atlanta DWM | Chattahoochee River / Lake Lanier | High (3.8/5) | Southern (GA Power) |
| Gwinnett County, GA | Gwinnett County DWR | Lake Lanier (Chattahoochee) | High (3.8/5) | Southern (GA Power) |
IA
| County | Water utility | Supply source | Watershed stress | Grid |
|---|---|---|---|---|
| Polk County, IA (Des Moines) | Des Moines Water Works | Des Moines + Raccoon Rivers | Low-Medium (2/5) | MISO Central |
| Pottawattamie County, IA (Council Bluffs) | Council Bluffs Water Works | Missouri River + alluvial aquifer | Low (1.8/5) | MISO / SPP |
MD
| County | Water utility | Supply source | Watershed stress | Grid |
|---|---|---|---|---|
| Charles County, MD | Charles County DPW | Potomac River + groundwater | Medium-High (2.8/5) | PJM Interconnection |
| Prince George's County, MD | WSSC Water | Potomac River | High (3.4/5) | PJM Interconnection |
MN
| County | Water utility | Supply source | Watershed stress | Grid |
|---|---|---|---|---|
| Hermantown, MN (Duluth) | Hermantown Public Utilities | St. Louis River watershed / Groundwater | Low (1.2/5) | MISO North |
NC
| County | Water utility | Supply source | Watershed stress | Grid |
|---|---|---|---|---|
| Mecklenburg County, NC (Charlotte) | Charlotte Water | Catawba River / Lake Norman | Medium (2.6/5) | Duke Energy Carolinas |
| New Hanover County, NC (Wilmington) | Cape Fear Public Utility Authority | Cape Fear River | Medium (2.4/5) | Duke Energy Progress |
NE
| County | Water utility | Supply source | Watershed stress | Grid |
|---|---|---|---|---|
| Sarpy County, NE (Omaha metro) | Metropolitan Utilities District (MUD) | Missouri River / Platte River wellfields | Low-Medium (1.4/5) | Southwest Power Pool (SPP) |
NM
| County | Water utility | Supply source | Watershed stress | Grid |
|---|---|---|---|---|
| Valencia County, NM (Los Lunas) | Village of Los Lunas (Water Division) | Middle Rio Grande + groundwater wells | Extremely High (4.1/5) | WECC (PNM) |
NV
| County | Water utility | Supply source | Watershed stress | Grid |
|---|---|---|---|---|
| Clark County, NV (Las Vegas) | Las Vegas Valley Water District (SNWA) | Lake Mead / Colorado River | Extremely High (4.5/5) | WECC Southwest |
| Storey County, NV (Tahoe-Reno Industrial Center) | TRI General Improvement District (TRI-GID) | Groundwater (Tracy Segment) + imported Reno-Sparks treated effluent | High (3.4/5) | WECC (NV Energy) |
| Washoe County, NV (Reno) | Truckee Meadows Water Authority (TMWA) | Truckee River + Donner Lake | High (3.2/5) | WECC Southwest |
OH
| County | Water utility | Supply source | Watershed stress | Grid |
|---|---|---|---|---|
| Franklin County, OH (Columbus) | Columbus DPU | Scioto River + Hoover/Griggs Reservoirs | Medium (2.5/5) | PJM (AEP zone) |
| Licking County, OH (New Albany) | Licking County Water + Aldrich aquifer | Aquifer + Hoover Reservoir | Medium-High (2.8/5) | PJM (AEP zone) |
OR
| County | Water utility | Supply source | Watershed stress | Grid |
|---|---|---|---|---|
| Morrow County, OR (Boardman) | Morrow County | Columbia River | Low (1.6/5) | BPA / Northwest |
| Umatilla County, OR (Hermiston / Boardman) | Umatilla County / Hermiston PW | Columbia River + Umatilla | Low (1.8/5) | BPA / Northwest |
| Washington County, OR (Hillsboro) | Hillsboro Water Department / Joint Water Commission | Tualatin River (Barney Reservoir / Trask transbasin) | Medium-High (2.6/5) | WECC / BPA (NW) |
TN
| County | Water utility | Supply source | Watershed stress | Grid |
|---|---|---|---|---|
| Davidson County, TN (Nashville) | Metro Water Services | Cumberland River | Low-Medium (2/5) | TVA |
| Shelby County, TN (Memphis) | Memphis Light, Gas & Water (MLGW) | Memphis Sand aquifer (groundwater) | Low-Medium (1.6/5) | TVA (SERC) |
TX
| County | Water utility | Supply source | Watershed stress | Grid |
|---|---|---|---|---|
| Bexar County, TX (San Antonio) | San Antonio Water System (SAWS) | Edwards Aquifer + diversified portfolio | Extremely High (4.2/5) | ERCOT |
| Denton County, TX (DFW) | Upper Trinity Regional Water District | Trinity River | High (3.5/5) | ERCOT |
| Williamson County, TX (Austin metro) | Brazos River Authority + city contracts | Brazos River + Edwards Aquifer + reservoirs | High (4/5) | ERCOT |
UT
| County | Water utility | Supply source | Watershed stress | Grid |
|---|---|---|---|---|
| Salt Lake County, UT | Salt Lake City DPU | Wasatch streams + Provo Reservoirs (CUP) | High (3.4/5) | WECC Northwest |
VA
| County | Water utility | Supply source | Watershed stress | Grid |
|---|---|---|---|---|
| Frederick County, VA | Frederick Water | Shenandoah River + Anderson Lake | Low-Medium (2/5) | PJM Interconnection |
| Henrico County, VA | Henrico County DPU | James River | Medium (2.6/5) | PJM Interconnection |
| Loudoun County, VA | Loudoun Water | Potomac River / Goose Creek Reservoir | High (3.4/5) | PJM Interconnection |
| Mecklenburg County, VA | Roanoke River Service Authority | Roanoke River / Buggs Island Lake | Low-Medium (1.8/5) | PJM Interconnection |
| Prince William County, VA | Prince William County Service Authority | Occoquan Reservoir | High (3.4/5) | PJM Interconnection |
| Spotsylvania County, VA | Spotsylvania County | Rappahannock River | Medium (2.4/5) | PJM Interconnection |
WA
| County | Water utility | Supply source | Watershed stress | Grid |
|---|---|---|---|---|
| Grant County, WA (Quincy) | Grant PUD | Columbia River | Low (1.5/5) | BPA / Northwest |
WI
| County | Water utility | Supply source | Watershed stress | Grid |
|---|---|---|---|---|
| Racine County, WI (Mount Pleasant) | Racine Water Utility (City of Racine) / Village of Mount Pleasant | Lake Michigan (Great Lakes Compact diversion) | Low (0.8/5) | MISO |
WY
| County | Water utility | Supply source | Watershed stress | Grid |
|---|---|---|---|---|
| Laramie County, WY (Cheyenne) | Cheyenne Board of Public Utilities | Crow Creek + Stage I/II (Little Snake/Colorado) + groundwater | Medium-High (2.5/5) | WECC (Western Interconnection) |