U.S. safety records, as the agencies wrote them. Independent.
Tap water

Tap water: drinking water violations by water system

EPA's records of the 49,342 active community water systems (the utilities that supply homes), serving 331,919,284 people: health-based violations, enforcement, lead and copper action level exceedances and inspections, as EPA publishes them. Enter your ZIP code to find yours. EPA's file dated Oct. 23, 2026. How to read a system's record · You got a notice about your water.

Find your water system

ZIP codes come from EPA's map of each system's service area; a ZIP can be served by more than one system. Homes on a private well are not on it.

1,693systems where EPA's tests found PFOA or PFOS at or above 4.0 ppt425systems whose newest lead test is above 15 ppb9,749systems with a health-based violation on EPA's record since Oct. 23, 2023

PFAS: where EPA's tests found PFOA or PFOS at or above 4.0 ppt

AK58%ME10%WI6%VT0%NH43%WA25%ID13%MT4%ND0%MN9%IL5%MI4%NY14%MA32%OR8%NV16%WY3%SD2%IA14%IN10%OH39%PA45%NJ78%CT65%RI26%CA29%UT12%CO10%NE8%MO6%KY27%WV13%VA35%MD3%DE77%AZ15%NM5%KS4%AR0%TN13%NC46%SC54%DC0%OK12%LA10%MS4%AL32%GA19%HI0%TX28%FL52%PR61%GU80%MP100%AS0%VI0%
under 5%5 to 15%15 to 30%30 to 50%50% or moreShare of each state's people on a tested system with PFOA or PFOS at or above 4.0 ppt in at least one EPA test, 2023 to 2026.

Lead: where the newest test is above EPA's action level (15 ppb)

AK1%ME0%WI0%VT0%NH1%WA0%ID0%MT0%ND0%MN1%IL4%MI0%NY0%MA1%OR0%NV0%WY0%SD0%IA0%IN0%OH1%PA0%NJ0%CT0%RI0%CA0%UT1%CO0%NE0%MO0%KY0%WV0%VA0%MD0%DE1%AZ0%NM0%KS0%AR0%TN0%NC0%SC0%DC0%OK0%LA0%MS0%AL0%GA0%HI0%TX0%FL0%PR0%GU0%MP1%AS0%VI2%
under 5%5 to 15%15 to 30%30 to 50%50% or moreOf the people served by each state's systems with a lead result on file, the share whose newest 90th-percentile result (since 2021) is above 15 ppb. The action level is not a health standard; EPA's words on it are on each system's page.

Share of people served by a system with a health-based violation since Oct. 23, 2023

AK12%ME5%WI25%VT7%NH6%WA1%ID6%MT6%ND2%MN3%IL9%MI9%NY57%MA14%OR22%NV2%WY11%SD10%IA2%IN10%OH9%PA18%NJ15%CT2%RI4%CA5%UT5%CO3%NE7%MO5%KY9%WV30%VA2%MD32%DE0%AZ13%NM32%KS6%AR10%TN4%NC20%SC21%DC6%OK44%LA35%MS24%AL11%GA5%HI0%TX21%FL11%PR48%GU7%MP76%AS95%VI98%
under 5%5 to 15%15 to 30%30 to 50%50% or morePeople as EPA counts them per system; a state's share is the people served by its systems with such a violation, over the people served by all its community water systems. In EPA's words: “Violations of maximum contaminant levels (MCLs) or maximum residual disinfectant levels (MRDLs), which specify the highest concentrations of contaminants or disinfectants, respectively, allowed in drinking water; or of treatment technique (TT) rules, which specify required processes intended to reduce the amounts of contaminants in drinking water. MCLs, MRDLs, and treatment technique rules are all health-based drinking water standards.”

Lead in tap water

EPA's lead sample results: the systems above the 15 ppb action level in their newest test, by water system.

PFAS (“forever chemicals”) in tap water

EPA's UCMR 5 tests: where PFOA and PFOS were found at or above EPA's 4.0 ppt limit, by water system.

Health-based violations since Oct. 23, 2023, by contaminant or rule

TTHM8,377LEAD AND COPPER RULE REVISIONS4,755Groundwater Rule4,294Total Haloacetic Acids (HAA5)3,306Arsenic2,722Nitrate1,526Combined Radium (-226 and -228)1,509Revised Total Coliform Rule1,248

All states and territories

  • Alabama502 systems6,410,290 people · 46 with a health-based violation since Oct. 23, 2023 · EPA lists 10 as currently in violation · 6 enforcement priority
  • Alaska408 systems702,057 people · 170 with a health-based violation since Oct. 23, 2023 · EPA lists 51 as currently in violation · 76 enforcement priority
  • American Samoa10 systems48,601 people · 4 with a health-based violation since Oct. 23, 2023 · EPA lists 1 as currently in violation · 10 enforcement priority
  • Arizona920 systems7,401,991 people · 334 with a health-based violation since Oct. 23, 2023 · EPA lists 70 as currently in violation · 48 enforcement priority
  • Arkansas658 systems3,068,335 people · 151 with a health-based violation since Oct. 23, 2023 · EPA lists 54 as currently in violation · 8 enforcement priority
  • California2,920 systems39,989,877 people · 727 with a health-based violation since Oct. 23, 2023 · EPA lists 505 as currently in violation · 32 enforcement priority
  • Colorado1,060 systems7,199,583 people · 209 with a health-based violation since Oct. 23, 2023 · EPA lists 58 as currently in violation · 21 enforcement priority
  • Connecticut476 systems2,781,121 people · 154 with a health-based violation since Oct. 23, 2023 · EPA lists 125 as currently in violation · 20 enforcement priority
  • Delaware204 systems1,025,658 people · 10 with a health-based violation since Oct. 23, 2023 · EPA lists 0 as currently in violation · 0 enforcement priority
  • District of Columbia9 systems671,524 people · 7 with a health-based violation since Oct. 23, 2023 · EPA lists 6 as currently in violation · 4 enforcement priority
  • Florida1,598 systems22,136,323 people · 126 with a health-based violation since Oct. 23, 2023 · EPA lists 1 as currently in violation · 164 enforcement priority
  • Georgia1,743 systems10,631,360 people · 81 with a health-based violation since Oct. 23, 2023 · EPA lists 1 as currently in violation · 25 enforcement priority
  • Guam5 systems174,316 people · 1 with a health-based violation since Oct. 23, 2023 · EPA lists 0 as currently in violation · 0 enforcement priority
  • Hawaii118 systems1,507,181 people · 3 with a health-based violation since Oct. 23, 2023 · EPA lists 0 as currently in violation · 0 enforcement priority
  • Idaho771 systems1,585,579 people · 153 with a health-based violation since Oct. 23, 2023 · EPA lists 30 as currently in violation · 42 enforcement priority
  • Illinois1,788 systems12,097,801 people · 293 with a health-based violation since Oct. 23, 2023 · EPA lists 73 as currently in violation · 38 enforcement priority
  • Indiana767 systems5,241,495 people · 155 with a health-based violation since Oct. 23, 2023 · EPA lists 32 as currently in violation · 21 enforcement priority
  • Iowa1,083 systems3,048,371 people · 41 with a health-based violation since Oct. 23, 2023 · EPA lists 6 as currently in violation · 5 enforcement priority
  • Kansas856 systems2,873,929 people · 116 with a health-based violation since Oct. 23, 2023 · EPA lists 14 as currently in violation · 41 enforcement priority
  • Kentucky372 systems5,054,309 people · 64 with a health-based violation since Oct. 23, 2023 · EPA lists 2 as currently in violation · 3 enforcement priority
  • Louisiana898 systems5,248,290 people · 414 with a health-based violation since Oct. 23, 2023 · EPA lists 204 as currently in violation · 98 enforcement priority
  • Maine386 systems691,894 people · 42 with a health-based violation since Oct. 23, 2023 · EPA lists 4 as currently in violation · 7 enforcement priority
  • Maryland460 systems5,531,909 people · 134 with a health-based violation since Oct. 23, 2023 · EPA lists 6 as currently in violation · 3 enforcement priority
  • Massachusetts529 systems10,830,007 people · 51 with a health-based violation since Oct. 23, 2023 · EPA lists 13 as currently in violation · 7 enforcement priority
  • Michigan1,391 systems7,459,900 people · 213 with a health-based violation since Oct. 23, 2023 · EPA lists 34 as currently in violation · 12 enforcement priority
  • Minnesota998 systems4,745,592 people · 71 with a health-based violation since Oct. 23, 2023 · EPA lists 18 as currently in violation · 12 enforcement priority
  • Mississippi1,015 systems3,225,756 people · 252 with a health-based violation since Oct. 23, 2023 · EPA lists 23 as currently in violation · 7 enforcement priority
  • Missouri1,434 systems5,712,206 people · 164 with a health-based violation since Oct. 23, 2023 · EPA lists 20 as currently in violation · 24 enforcement priority
  • Montana851 systems827,162 people · 83 with a health-based violation since Oct. 23, 2023 · EPA lists 24 as currently in violation · 8 enforcement priority
  • Nebraska595 systems1,714,224 people · 56 with a health-based violation since Oct. 23, 2023 · EPA lists 3 as currently in violation · 4 enforcement priority
  • Nevada211 systems3,130,140 people · 55 with a health-based violation since Oct. 23, 2023 · EPA lists 26 as currently in violation · 19 enforcement priority
  • New Hampshire706 systems922,880 people · 85 with a health-based violation since Oct. 23, 2023 · EPA lists 6 as currently in violation · 9 enforcement priority
  • New Jersey555 systems8,903,838 people · 98 with a health-based violation since Oct. 23, 2023 · EPA lists 21 as currently in violation · 39 enforcement priority
  • New Mexico648 systems2,086,260 people · 315 with a health-based violation since Oct. 23, 2023 · EPA lists 134 as currently in violation · 57 enforcement priority
  • New York2,253 systems18,308,998 people · 250 with a health-based violation since Oct. 23, 2023 · EPA lists 53 as currently in violation · 18 enforcement priority
  • North Carolina1,982 systems9,735,478 people · 389 with a health-based violation since Oct. 23, 2023 · EPA lists 49 as currently in violation · 0 enforcement priority
  • North Dakota319 systems736,449 people · 23 with a health-based violation since Oct. 23, 2023 · EPA lists 2 as currently in violation · 1 enforcement priority
  • Northern Mariana Islands35 systems63,904 people · 6 with a health-based violation since Oct. 23, 2023 · EPA lists 0 as currently in violation · 1 enforcement priority
  • Ohio1,122 systems10,526,227 people · 204 with a health-based violation since Oct. 23, 2023 · EPA lists 34 as currently in violation · 56 enforcement priority
  • Oklahoma901 systems3,685,980 people · 610 with a health-based violation since Oct. 23, 2023 · EPA lists 101 as currently in violation · 46 enforcement priority
  • Oregon948 systems3,756,906 people · 200 with a health-based violation since Oct. 23, 2023 · EPA lists 33 as currently in violation · 60 enforcement priority
  • Pennsylvania1,849 systems11,466,690 people · 365 with a health-based violation since Oct. 23, 2023 · EPA lists 69 as currently in violation · 53 enforcement priority
  • Puerto Rico404 systems3,295,853 people · 261 with a health-based violation since Oct. 23, 2023 · EPA lists 239 as currently in violation · 125 enforcement priority
  • Rhode Island88 systems1,065,084 people · 13 with a health-based violation since Oct. 23, 2023 · EPA lists 5 as currently in violation · 4 enforcement priority
  • South Carolina559 systems4,778,679 people · 66 with a health-based violation since Oct. 23, 2023 · EPA lists 0 as currently in violation · 2 enforcement priority
  • South Dakota511 systems938,652 people · 71 with a health-based violation since Oct. 23, 2023 · EPA lists 14 as currently in violation · 4 enforcement priority
  • Tennessee445 systems7,927,701 people · 33 with a health-based violation since Oct. 23, 2023 · EPA lists 4 as currently in violation · 12 enforcement priority
  • Texas4,760 systems33,238,927 people · 1,435 with a health-based violation since Oct. 23, 2023 · EPA lists 315 as currently in violation · 282 enforcement priority
  • U.S. Virgin Islands77 systems82,463 people · 63 with a health-based violation since Oct. 23, 2023 · EPA lists 44 as currently in violation · 3 enforcement priority
  • Utah520 systems3,736,345 people · 78 with a health-based violation since Oct. 23, 2023 · EPA lists 12 as currently in violation · 5 enforcement priority
  • Vermont404 systems465,050 people · 43 with a health-based violation since Oct. 23, 2023 · EPA lists 9 as currently in violation · 4 enforcement priority
  • Virginia1,056 systems7,442,593 people · 74 with a health-based violation since Oct. 23, 2023 · EPA lists 8 as currently in violation · 5 enforcement priority
  • Washington2,373 systems9,607,930 people · 144 with a health-based violation since Oct. 23, 2023 · EPA lists 19 as currently in violation · 23 enforcement priority
  • West Virginia413 systems1,555,886 people · 187 with a health-based violation since Oct. 23, 2023 · EPA lists 103 as currently in violation · 152 enforcement priority
  • Wisconsin1,051 systems4,278,493 people · 285 with a health-based violation since Oct. 23, 2023 · EPA lists 29 as currently in violation · 15 enforcement priority
  • Wyoming327 systems545,237 people · 71 with a health-based violation since Oct. 23, 2023 · EPA lists 20 as currently in violation · 7 enforcement priority

From EPA's Safe Drinking Water Information System (SDWIS), through EPA ECHO's drinking water system download. Health-based violations from EPA Envirofacts, downloaded Nov. 2, 2026. EPA's file dated Oct. 23, 2026. EPA: “All compliance and enforcement data displayed on ECHO are current as of the last official quarterly refresh of the source data system, SDWIS, which may lag by three to six months.” These are records of violations, not a test of your tap water today: your water system's annual Consumer Confidence Report has its test results. Names and values are shown as EPA writes them. EPA ECHO drinking water search.