Site Map
Browse every page on TapSafeWater. Pick a state below to see its cities, ZIP codes, and water systems. For machine-readable indexes, see XML sitemap or llms.txt.
Main pages
Contaminants (15)
- Lead(0.015 mg/L (action level))
- Arsenic(0.01 mg/L)
- Nitrate(10 mg/L as nitrogen)
- Copper(1.3 mg/L (action level))
- Coliform Bacteria(0 per 100 mL presence/absence)
- E. Coli(0 per 100 mL presence/absence)
- Total Trihalomethanes (TTHMs)(0.08 mg/L)
- Haloacetic Acids (HAA5)(0.06 mg/L)
- Radium(5 pCi/L (combined Ra-226 and Ra-228))
- Uranium(0.03 mg/L)
- Fluoride(4.0 mg/L)
- Atrazine(0.003 mg/L)
- PFAS (PFOA & PFOS)(0.000004 mg/L (4 ppt))
- Chromium (Total)(0.1 mg/L)
- Mercury (Inorganic)(0.002 mg/L)
Directory by State (51)
19,741 cities · 20,388 ZIP codes · 48,046 water systems. Pick a state to drill in.
51 states shown
- Alabama361 cities · 385 ZIPs · 500 systems
- Alaska189 cities · 198 ZIPs · 406 systems
- Arizona177 cities · 258 ZIPs · 749 systems
- Arkansas403 cities · 401 ZIPs · 664 systems
- California894 cities · 1,084 ZIPs · 2,815 systems
- Colorado331 cities · 384 ZIPs · 1,056 systems
- Connecticut159 cities · 161 ZIPs · 474 systems
- Delaware48 cities · 46 ZIPs · 207 systems
- Florida482 cities · 656 ZIPs · 1,591 systems
- Georgia511 cities · 543 ZIPs · 1,742 systems
- Hawaii35 cities · 37 ZIPs · 117 systems
- Idaho233 cities · 239 ZIPs · 767 systems
- Illinois1,075 cities · 1,016 ZIPs · 1,788 systems
- Indiana450 cities · 470 ZIPs · 770 systems
- Iowa609 cities · 613 ZIPs · 1,078 systems
- Kansas554 cities · 554 ZIPs · 855 systems
- Kentucky251 cities · 250 ZIPs · 374 systems
- Louisiana338 cities · 366 ZIPs · 911 systems
- Maine208 cities · 192 ZIPs · 385 systems
- Maryland169 cities · 167 ZIPs · 452 systems
- Massachusetts350 cities · 348 ZIPs · 526 systems
- Michigan636 cities · 640 ZIPs · 1,377 systems
- Minnesota736 cities · 692 ZIPs · 967 systems
- Mississippi363 cities · 385 ZIPs · 1,012 systems
- Missouri696 cities · 675 ZIPs · 1,431 systems
- Montana236 cities · 243 ZIPs · 798 systems
- Nebraska452 cities · 453 ZIPs · 583 systems
- Nevada68 cities · 94 ZIPs · 195 systems
- New Hampshire206 cities · 186 ZIPs · 705 systems
- New Jersey320 cities · 273 ZIPs · 555 systems
- New Mexico245 cities · 276 ZIPs · 558 systems
- New York883 cities · 859 ZIPs · 2,210 systems
- North Carolina480 cities · 523 ZIPs · 1,980 systems
- North Dakota230 cities · 232 ZIPs · 305 systems
- Ohio624 cities · 603 ZIPs · 1,127 systems
- Oklahoma503 cities · 525 ZIPs · 889 systems
- Oregon300 cities · 310 ZIPs · 937 systems
- Pennsylvania823 cities · 790 ZIPs · 1,851 systems
- Rhode Island47 cities · 47 ZIPs · 89 systems
- South Carolina214 cities · 230 ZIPs · 563 systems
- South Dakota223 cities · 253 ZIPs · 463 systems
- Tennessee288 cities · 311 ZIPs · 446 systems
- Texas1,277 cities · 1,414 ZIPs · 4,737 systems
- Utah258 cities · 214 ZIPs · 505 systems
- Vermont199 cities · 165 ZIPs · 404 systems
- Virginia322 cities · 335 ZIPs · 1,059 systems
- Washington359 cities · 395 ZIPs · 2,307 systems
- Washington DC1 cities · 3 ZIPs · 4 systems
- West Virginia211 cities · 203 ZIPs · 417 systems
- Wisconsin593 cities · 577 ZIPs · 1,022 systems
- Wyoming121 cities · 114 ZIPs · 323 systems