Water quality for ZIP code 17603
ZIP 17603 covers Lancaster and Millersville in Lancaster County, Pennsylvania, one of 53 ZIP codes in the county. 427 active public water systems serve the county; 220 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Lancaster County
97 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Millersville Univ |
7,950 | 2 | 2.6 mi | |
| East Hempfield Water Auth |
20,988 | 2 | 4.7 mi | |
| East Petersburg Borough |
6,215 | 1 | 4.9 mi | |
| Conestoga Hills Community |
150 | 2 | 5.0 mi | |
| Conestoga Mobile Home Park |
65 | 1 | 6.2 mi | |
| Landis Homes |
850 | 2 | 6.5 mi | |
| Columbia Water CO |
25,200 | 1 | 7.2 mi | |
| Smithville MHP |
166 | 0 | 8.3 mi | |
| Warwick Twp Lititz Sys |
8,561 | 1 | 8.4 mi | |
| Strasburg Muni Water Auth |
3,100 | 1 | 8.4 mi | |
| Upper Leacock Township |
7,734 | 0 | 8.6 mi | |
| Lititz Boro |
9,397 | 0 | 8.6 mi | |
| Southland Hills Mobile Homes |
96 | 1 | 8.7 mi | |
| Pinehurst Manor |
47 | 2 | 8.7 mi | |
| Tamarack & Spread Eagle MHP |
300 | 4 | 8.7 mi | |
| Irvin Manheim MHP |
77 | 1 | 8.9 mi | |
| Schoolhouse Apts |
38 | 0 | 9.1 mi | |
| Rolling Hills MHP |
150 | 1 | 9.1 mi | |
| Hilltop Acres MHP |
120 | 2 | 9.1 mi | |
| West Earl Water Authority |
4,327 | 2 | 9.3 mi | |
| Warwick Twp Rothsville System |
2,846 | 2 | 9.4 mi | |
| Cocalico Manor MHP |
92 | 1 | 9.6 mi | |
| Lancaster Est |
304 | 3 | 9.7 mi | |
| Manheim Area Water & Sewer Aut |
6,701 | 0 | 9.7 mi | |
| Ridgewood Manor MHP |
314 | 3 | 9.9 mi |
Non-community systems in Lancaster County (329: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Lancaster County, the county this ZIP code lies in, nearest to the ZIP code's centre first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system.
ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA files.
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 Pennsylvania 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.