Nevada
Washoe County drinking water quality
70 active public water systems serve 494,695 people in Washoe County. 46 are compliant, 24 had at least one EPA violation in the past three years, 5 are designated serious violators, and 2 carry a health flag.
Needs attention
Community water systems
25 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Truckee Meadows Water Authority Reno, Sparks |
442,000 | 0 | 0 | |
|
Sun Valley Gid |
17,000 | 0 | 0 | |
|
Great Basin Water CO Cold Springs |
9,910 | 0 | 0 | |
|
Incline Village Gid Incline Village |
9,313 | 0 | 0 | |
|
Great Basin Water CO Spanish Springs |
1,450 | 1 | 0 | |
|
Steamboat Springs Waterworks INC |
998 | 0 | 0 | |
|
Verdi Meadows Utility Company INC |
510 | 0 | 0 | |
|
Empire Mining Company Empire |
350 | 3 | 0 | |
|
Grandview Terrace Water District |
328 | 1 | 0 | |
|
Gerlach Gid Gerlach |
180 | 0 | 0 | |
|
Lightning W |
163 | 0 | 0 | |
|
Old Washoe Estates |
135 | 0 | 0 | |
|
Conestoga MHP |
120 | 0 | 0 | |
|
Silver Knolls Mutual Water Company |
120 | 2 | 1 | |
|
Stampmill |
118 | 0 | 0 | |
|
Sunrise Estates |
90 | 0 | 0 | |
|
Wadsworth Mobile Home Park |
90 | 0 | 0 | |
|
Rio Vista NV LLC |
65 | 0 | 0 | |
|
KE TA Mobile Home Park |
60 | 0 | 0 | |
|
Reno Sahara Trailer Park |
60 | 2 | 0 | |
|
Sutcliffe Mobile Park |
60 | 1 | 0 | |
|
Rosemount Water CO |
54 | 6 | 5 | |
|
Mount Rose Bowl Property Owners Water CO |
40 | 3 | 0 | |
|
Alpine Mobile Home Park |
35 | 0 | 0 | |
|
Lark Mobile Home Park |
30 | 0 | 0 |
Non-community systems (45: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
Inactive systems (157, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Nevada records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.