230 public water systems in Indiana were sampled in EPA's UCMR 5 programme (2023–2025); we show six PFAS and lithium. Read 2026-10-31.
19 of 230 systems had at least one sample above a 2024 federal limit; 76 had at least one PFAS found above the reporting level; 154 had none found above the reporting level.
A single sample above a 2024 limit is a measurement, not a violation. Compliance is judged on running yearly averages, and water systems have until 2029 to meet the limits. On 20 May 2026 EPA proposed giving qualifying systems until 2031 for PFOA and PFOS and removing the limits for PFHxS, PFNA and HFPO-DA; those proposals were not final when we last checked (5 Nov 2026). Counts are per system, not per person; population figures are available only for systems serving more than 25,000 people (about 3,237,867 people across those systems here). UCMR 5 was a one-time national monitoring programme (2023–2025). The results are a snapshot at the system's entry points or taps on the sample dates, not a continuous measurement and not a compliance record.
| System | People served | UCMR 5 result |
|---|---|---|
| Indianapolis Citizens Water - Indianapolis | 880,345 | Detected, below the 2024 limit |
Pages for these are being added in stages. The data for all 230 systems is in the public dataset.
| System | People served | UCMR 5 result |
|---|---|---|
| Fort Wayne - 3 Rivers Filtration Plant Fort Wayne - 3 Rivers Filtration Plant | 269,994 | None detected (below the reporting level) |
| Indiana American Water - Northwest Indiana American Water - Northwest | 210,510 | None detected (below the reporting level) |
| Evansville Water Utility Evansville Water Utility | 182,444 | None detected (below the reporting level) |
| South Bend Water Works South Bend Water Works | 115,000 | Above the 2024 limit in at least one sample |
| Indiana American Water - S. Indiana Indiana American Water - S. Indiana | 104,445 | None detected (below the reporting level) |
| Carmel Water Department Carmel Water Department | 99,927 | None detected (below the reporting level) |
| Indiana American Water - Johnson County Indiana American Water - Johnson County | 86,813 | None detected (below the reporting level) |
| City of Bloomington Utilities City of Bloomington Utilities | 83,000 | None detected (below the reporting level) |
| Hammond Water Works Department Hammond Water Works Department | 78,384 | None detected (below the reporting level) |
| Indiana American Water - Muncie Indiana American Water - Muncie | 74,030 | None detected (below the reporting level) |
| Lafayette Water Works, In Lafayette Water Works, In | 70,835 | None detected (below the reporting level) |
| Indiana American Water - Terre Haute Indiana American Water - Terre Haute | 67,765 | Above the 2024 limit in at least one sample |
| Citizens Water of Westfield, Llc Citizens Water of Westfield, Llc | 61,493 | None detected (below the reporting level) |
| Indiana American Water - Kokomo Indiana American Water - Kokomo | 59,313 | None detected (below the reporting level) |
| Anderson Water Department Anderson Water Department | 55,212 | Above the 2024 limit in at least one sample |
| Columbus Municipal Utility Columbus Municipal Utility | 51,122 | Detected, below the 2024 limit |
| Purdue Univ. Water Works Purdue Univ. Water Works | 50,000 | Detected, below the 2024 limit |
| Mishawaka Utilities Mishawaka Utilities | 49,675 | Above the 2024 limit in at least one sample |
| City of Lawrence Utilities City of Lawrence Utilities | 49,000 | None detected (below the reporting level) |
| Elkhart Public Works and Utilities Elkhart Public Works and Utilities | 46,455 | Above the 2024 limit in at least one sample |
| Indiana American Water - Noblesville Indiana American Water - Noblesville | 45,575 | None detected (below the reporting level) |
| Indiana American Water - Richmond Indiana American Water - Richmond | 41,485 | None detected (below the reporting level) |
| Valparaiso Department of Water Works Valparaiso Department of Water Works | 36,000 | None detected (below the reporting level) |
| Indiana American Water - West Lafayette Indiana American Water - West Lafayette | 35,533 | None detected (below the reporting level) |
| Plainfield Water Works Plainfield Water Works | 34,477 | Detected, below the 2024 limit |