This page summarizes EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR 5, 2023–2025) drinking-water monitoring records linked to ZIP codes in Pennsylvania, as processed for the PFAS Estimator national dataset. Data updated: July 2026.
| Compound | Applicable threshold | ZIP codes detected | At/above threshold | Mean detected | Maximum detected |
|---|---|---|---|---|---|
| PFOA | 0.004 µg/L (MCL) | 366 (57.2% of state) | 366 (100.0%) — all detections at/above limit by construction | 0.0109 µg/L | 0.235 µg/L |
| PFOS | 0.004 µg/L (MCL) | 324 (50.6% of state) | 324 (100.0%) — all detections at/above limit by construction | 0.0101 µg/L | 0.153 µg/L |
| PFHxS | 0.01 µg/L (MCL) | 201 (31.4% of state) | 15 (7.5% of detected) | 0.0068 µg/L | 0.0332 µg/L |
| PFNA | 0.01 µg/L (MCL) | 194 (30.3% of state) | 111 (57.2% of detected) | 0.0099 µg/L | 0.0998 µg/L |
| PFBS | 2.0 µg/L (HI reference) | 376 (58.8% of state) | not calculated¹ | 0.0084 µg/L | 0.043 µg/L |
| Lithium | 7.36 µg/L (reference, not a regulatory limit) | 414 (64.7% of state) | 414 (100.0%) at/above reference | 38.0999 µg/L | 702.0 µg/L |
| PFPeA | — (no federal limit) | 410 (64.1% of state) | — | 0.0129 µg/L | 0.1957 µg/L |
| PFBA | — (no federal limit) | 331 (51.7% of state) | — | 0.0105 µg/L | 0.0573 µg/L |
| PFHpA | — (no federal limit) | 232 (36.2% of state) | — | 0.0066 µg/L | 0.0435 µg/L |
| 6:2 FTS | — (no federal limit) | 14 (2.2% of state) | — | 0.0285 µg/L | 0.2262 µg/L |
| PFDA | — (no federal limit) | 1 (0.2% of state) | — | 0.007 µg/L | 0.007 µg/L |
640 ZIP codes with at least one recorded PFAS detection. Click a ZIP code to view its full compound-level results.
| ZIP code | Compounds detected | At/above threshold |
|---|---|---|
| 15001 | 1 | No |
| 15004 | 1 | No |
| 15006 | 1 | No |
| 15009 | 8 | Yes (3) |
| 15010 | 5 | Yes (2) |
| 15017 | 1 | No |
| 15019 | 1 | No |
| 15021 | 1 | No |
| 15024 | 1 | No |
| 15025 | 1 | No |
| 15032 | 1 | No |
| 15034 | 1 | No |
| 15037 | 1 | No |
| 15038 | 1 | No |
| 15042 | 3 | No |
| 15044 | 1 | No |
| 15045 | 1 | No |
| 15051 | 1 | No |
| 15052 | 3 | Yes (1) |
| 15053 | 1 | No |
| 15054 | 1 | No |
| 15057 | 1 | No |
| 15059 | 3 | Yes (1) |
| 15060 | 1 | No |
| 15061 | 3 | Yes (1) |
| 15063 | 1 | No |
| 15065 | 1 | No |
| 15067 | 1 | No |
| 15068 | 1 | No |
| 15071 | 3 | Yes (1) |
| 15075 | 1 | No |
| 15076 | 1 | No |
| 15084 | 2 | No |
| 15088 | 1 | No |
| 15101 | 5 | Yes (2) |
| 15102 | 1 | No |
| 15106 | 1 | No |
| 15108 | 6 | Yes (3) |
| 15112 | 1 | No |
| 15116 | 1 | No |
| 15120 | 1 | No |
| 15122 | 1 | No |
| 15123 | 1 | No |
| 15129 | 1 | No |
| 15131 | 1 | No |
| 15139 | 1 | No |
| 15140 | 1 | No |
| 15143 | 4 | No |
| 15144 | 2 | No |
| 15146 | 1 | No |
| 15147 | 1 | No |
| 15208 | 1 | No |
| 15209 | 1 | No |
| 15210 | 1 | No |
| 15213 | 1 | No |
| 15215 | 1 | No |
| 15223 | 1 | No |
| 15228 | 1 | No |
| 15231 | 3 | Yes (1) |
| 15234 | 1 | No |
| 15235 | 1 | No |
| 15236 | 1 | No |
| 15237 | 1 | No |
| 15238 | 1 | No |
| 15239 | 1 | No |
| 15241 | 1 | No |
| 15242 | 1 | No |
| 15301 | 1 | No |
| 15311 | 1 | No |
| 15312 | 1 | No |
| 15314 | 1 | No |
| 15317 | 1 | No |
| 15321 | 1 | No |
| 15323 | 1 | No |
| 15329 | 1 | No |
| 15330 | 1 | No |
| 15332 | 1 | No |
| 15342 | 1 | No |
| 15363 | 1 | No |
| 15376 | 2 | No |
| 15377 | 2 | No |
| 15401 | 1 | No |
| 15413 | 1 | No |
| 15417 | 1 | No |
| 15419 | 1 | No |
| 15423 | 1 | No |
| 15425 | 1 | No |
| 15431 | 1 | No |
| 15436 | 1 | No |
| 15439 | 1 | No |
| 15442 | 1 | No |
| 15445 | 1 | No |
| 15446 | 1 | No |
| 15451 | 1 | No |
| 15456 | 1 | No |
| 15458 | 1 | No |
| 15461 | 1 | No |
| 15462 | 1 | No |
| 15464 | 1 | No |
| 15468 | 1 | No |
| 15469 | 1 | No |
| 15470 | 1 | No |
| 15472 | 1 | No |
| 15478 | 1 | No |
| 15484 | 1 | No |
| 15490 | 1 | No |
| 15501 | 1 | No |
| 15531 | 1 | No |
| 15557 | 1 | No |
| 15610 | 1 | No |
| 15622 | 1 | No |
| 15627 | 6 | Yes (2) |
| 15628 | 1 | No |
| 15646 | 1 | No |
| 15650 | 5 | Yes (2) |
| 15671 | 1 | No |
| 15701 | 1 | No |
| 15705 | 1 | No |
| 15711 | 1 | No |
| 15714 | 1 | No |
| 15715 | 1 | No |
| 15716 | 5 | Yes (2) |
| 15717 | 6 | Yes (2) |
| 15720 | 5 | Yes (2) |
| 15722 | 1 | No |
| 15733 | 1 | No |
| 15748 | 5 | Yes (2) |
| 15750 | 5 | Yes (2) |
| 15762 | 1 | No |
| 15767 | 1 | No |
| 15779 | 5 | Yes (2) |
| 15781 | 1 | No |
| 15801 | 1 | No |
| 15825 | 2 | No |
| 15829 | 1 | No |
| 15902 | 1 | No |
| 15904 | 1 | No |
| 15905 | 1 | No |
| 15920 | 5 | Yes (2) |
| 15923 | 5 | Yes (2) |
| 15925 | 1 | No |
| 15928 | 1 | No |
| 15929 | 5 | Yes (2) |
| 15931 | 1 | No |
| 15935 | 1 | No |
| 15936 | 1 | No |
| 15937 | 1 | No |
| 15938 | 1 | No |
| 15943 | 1 | No |
| 15944 | 5 | Yes (2) |
| 15946 | 1 | No |
| 15948 | 1 | No |
| 15953 | 1 | No |
| 15954 | 5 | Yes (2) |
| 15963 | 2 | No |
| 16037 | 4 | No |
| 16055 | 1 | No |
| 16056 | 1 | No |
| 16057 | 1 | No |
| 16059 | 1 | No |
| 16063 | 5 | Yes (1) |
| 16066 | 1 | No |
| 16101 | 2 | No |
| 16102 | 2 | No |
| 16103 | 2 | No |
| 16105 | 2 | No |
| 16108 | 2 | No |
| 16116 | 2 | No |
| 16117 | 4 | No |
| 16121 | 1 | No |
| 16123 | 4 | No |
| 16125 | 1 | No |
| 16127 | 1 | No |
| 16132 | 1 | No |
| 16136 | 4 | No |
| 16137 | 2 | No |
| 16141 | 2 | No |
| 16142 | 1 | No |
| 16143 | 1 | No |
| 16146 | 1 | No |
| 16148 | 1 | No |
| 16150 | 1 | No |
| 16155 | 1 | No |
| 16157 | 4 | No |
| 16159 | 1 | No |
| 16160 | 2 | No |
| 16161 | 1 | No |
| 16214 | 1 | No |
| 16232 | 1 | No |
| 16234 | 1 | No |
| 16235 | 1 | No |
| 16239 | 1 | No |
| 16254 | 1 | No |
| 16255 | 1 | No |
| 16257 | 1 | No |
| 16258 | 1 | No |
| 16301 | 1 | No |
| 16316 | 1 | No |
| 16319 | 1 | No |
| 16323 | 2 | No |
| 16334 | 1 | No |
| 16346 | 1 | No |
| 16354 | 1 | Yes (1) |
| 16374 | 1 | No |
| 16646 | 1 | No |
| 16735 | 1 | No |
| 16801 | 1 | No |
| 16823 | 3 | Yes (1) |
| 16827 | 1 | No |
| 16830 | 2 | No |
| 16851 | 1 | No |
| 16901 | 1 | No |
| 16915 | 1 | No |
| 17001 | 4 | Yes (2) |
| 17003 | 5 | Yes (1) |
| 17007 | 1 | No |
| 17010 | 5 | Yes (1) |
| 17011 | 4 | Yes (2) |
| 17013 | 7 | Yes (2) |
| 17015 | 4 | Yes (2) |
| 17019 | 4 | Yes (2) |
| 17020 | 1 | No |
| 17022 | 6 | Yes (2) |
| 17025 | 4 | Yes (2) |
| 17028 | 1 | No |
| 17033 | 5 | Yes (1) |
| 17036 | 5 | Yes (1) |
| 17042 | 5 | Yes (1) |
| 17043 | 4 | Yes (2) |
| 17050 | 4 | Yes (2) |
| 17055 | 5 | Yes (2) |
| 17057 | 8 | Yes (2) |
| 17061 | 5 | Yes (2) |
| 17067 | 4 | Yes (2) |
| 17070 | 5 | Yes (2) |
| 17072 | 4 | Yes (2) |
| 17073 | 1 | No |
| 17074 | 4 | Yes (2) |
| 17078 | 6 | Yes (2) |
| 17093 | 4 | Yes (2) |
| 17105 | 4 | Yes (2) |
| 17109 | 5 | Yes (1) |
| 17110 | 2 | No |
| 17111 | 5 | Yes (1) |
| 17112 | 5 | Yes (1) |
| 17201 | 2 | No |
| 17202 | 2 | No |
| 17224 | 2 | No |
| 17225 | 2 | No |
| 17231 | 2 | No |
| 17236 | 2 | No |
| 17252 | 2 | No |
| 17315 | 6 | Yes (2) |
| 17317 | 4 | Yes (2) |
| 17319 | 8 | Yes (2) |
| 17325 | 5 | Yes (2) |
| 17331 | 1 | No |
| 17339 | 4 | Yes (2) |
| 17340 | 5 | Yes (2) |
| 17344 | 1 | No |
| 17349 | 4 | No |
| 17350 | 6 | Yes (2) |
| 17361 | 7 | Yes (2) |
| 17363 | 4 | Yes (2) |
| 17370 | 8 | Yes (2) |
| 17408 | 6 | Yes (2) |
| 17501 | 7 | Yes (2) |
| 17505 | 5 | Yes (1) |
| 17508 | 1 | No |
| 17512 | 5 | Yes (1) |
| 17517 | 5 | Yes (2) |
| 17520 | 7 | Yes (2) |
| 17522 | 8 | Yes (2) |
| 17538 | 4 | Yes (2) |
| 17540 | 8 | Yes (2) |
| 17543 | 5 | Yes (1) |
| 17545 | 8 | Yes (2) |
| 17547 | 3 | No |
| 17550 | 3 | No |
| 17551 | 7 | Yes (2) |
| 17552 | 5 | Yes (1) |
| 17554 | 5 | Yes (1) |
| 17557 | 7 | Yes (2) |
| 17567 | 5 | Yes (2) |
| 17569 | 5 | Yes (2) |
| 17572 | 5 | Yes (1) |
| 17575 | 4 | Yes (2) |
| 17576 | 5 | Yes (1) |
| 17578 | 5 | Yes (2) |
| 17580 | 1 | No |
| 17584 | 5 | Yes (1) |
| 17601 | 8 | Yes (2) |
| 17602 | 6 | Yes (2) |
| 17603 | 6 | Yes (2) |
| 17604 | 4 | Yes (2) |
| 17701 | 4 | Yes (1) |
| 17702 | 4 | Yes (1) |
| 17754 | 5 | Yes (2) |
| 17756 | 1 | No |
| 17820 | 1 | No |
| 17821 | 1 | No |
| 17824 | 1 | No |
| 17870 | 1 | No |
| 17921 | 2 | Yes (1) |
| 17931 | 3 | Yes (1) |
| 17935 | 1 | No |
| 17938 | 1 | No |
| 17968 | 1 | No |
| 17976 | 1 | No |
| 17978 | 1 | No |
| 17983 | 1 | No |
| 18012 | 7 | Yes (4) |
| 18013 | 1 | No |
| 18015 | 1 | No |
| 18032 | 2 | No |
| 18034 | 1 | No |
| 18036 | 1 | No |
| 18037 | 7 | Yes (2) |
| 18041 | 5 | Yes (2) |
| 18049 | 10 | Yes (4) |
| 18051 | 4 | Yes (1) |
| 18052 | 7 | Yes (2) |
| 18056 | 5 | Yes (2) |
| 18062 | 4 | Yes (1) |
| 18069 | 3 | Yes (1) |
| 18070 | 5 | Yes (2) |
| 18071 | 7 | Yes (4) |
| 18073 | 5 | Yes (2) |
| 18074 | 6 | Yes (2) |
| 18076 | 5 | Yes (2) |
| 18078 | 1 | No |
| 18080 | 1 | No |
| 18101 | 3 | Yes (1) |
| 18102 | 4 | Yes (2) |
| 18103 | 5 | Yes (2) |
| 18104 | 5 | Yes (2) |
| 18106 | 4 | Yes (1) |
| 18109 | 3 | Yes (1) |
| 18201 | 3 | No |
| 18224 | 4 | Yes (2) |
| 18231 | 1 | No |
| 18235 | 1 | No |
| 18237 | 1 | No |
| 18254 | 1 | No |
| 18301 | 1 | No |
| 18323 | 1 | No |
| 18324 | 1 | No |
| 18325 | 1 | No |
| 18326 | 2 | Yes (1) |
| 18342 | 1 | No |
| 18344 | 5 | Yes (2) |
| 18346 | 5 | Yes (2) |
| 18403 | 5 | Yes (2) |
| 18410 | 5 | Yes (2) |
| 18411 | 5 | Yes (2) |
| 18414 | 5 | Yes (2) |
| 18424 | 5 | Yes (1) |
| 18428 | 2 | No |
| 18431 | 1 | No |
| 18434 | 5 | Yes (2) |
| 18435 | 2 | No |
| 18436 | 1 | No |
| 18447 | 5 | Yes (2) |
| 18452 | 5 | Yes (2) |
| 18458 | 1 | No |
| 18466 | 5 | Yes (2) |
| 18471 | 5 | Yes (2) |
| 18503 | 5 | Yes (2) |
| 18504 | 5 | Yes (2) |
| 18505 | 5 | Yes (2) |
| 18507 | 5 | Yes (2) |
| 18508 | 5 | Yes (2) |
| 18509 | 5 | Yes (2) |
| 18510 | 5 | Yes (2) |
| 18512 | 5 | Yes (2) |
| 18517 | 5 | Yes (2) |
| 18518 | 5 | Yes (2) |
| 18519 | 5 | Yes (2) |
| 18603 | 6 | Yes (2) |
| 18612 | 6 | Yes (2) |
| 18627 | 4 | Yes (3) |
| 18635 | 6 | Yes (2) |
| 18657 | 4 | Yes (2) |
| 18706 | 4 | Yes (2) |
| 18707 | 1 | No |
| 18801 | 1 | No |
| 18901 | 9 | Yes (2) |
| 18902 | 8 | Yes (2) |
| 18912 | 8 | Yes (2) |
| 18914 | 9 | Yes (3) |
| 18915 | 9 | Yes (2) |
| 18923 | 8 | Yes (2) |
| 18924 | 4 | Yes (1) |
| 18925 | 8 | Yes (2) |
| 18929 | 9 | Yes (3) |
| 18932 | 4 | Yes (1) |
| 18934 | 6 | Yes (2) |
| 18936 | 9 | Yes (2) |
| 18938 | 7 | Yes (2) |
| 18940 | 9 | Yes (2) |
| 18944 | 6 | Yes (2) |
| 18951 | 8 | Yes (3) |
| 18954 | 9 | Yes (2) |
| 18960 | 6 | Yes (2) |
| 18964 | 4 | Yes (1) |
| 18966 | 9 | Yes (3) |
| 18969 | 9 | Yes (2) |
| 18971 | 4 | Yes (1) |
| 18974 | 9 | Yes (3) |
| 18976 | 9 | Yes (3) |
| 18977 | 6 | Yes (2) |
| 19001 | 9 | Yes (3) |
| 19002 | 10 | Yes (4) |
| 19003 | 9 | Yes (3) |
| 19004 | 9 | Yes (3) |
| 19006 | 9 | Yes (3) |
| 19007 | 9 | Yes (3) |
| 19008 | 9 | Yes (3) |
| 19009 | 9 | Yes (3) |
| 19012 | 9 | Yes (3) |
| 19013 | 9 | Yes (3) |
| 19014 | 9 | Yes (3) |
| 19015 | 9 | Yes (3) |
| 19016 | 3 | Yes (1) |
| 19017 | 9 | Yes (3) |
| 19018 | 9 | Yes (3) |
| 19020 | 9 | Yes (3) |
| 19021 | 9 | Yes (3) |
| 19022 | 9 | Yes (3) |
| 19023 | 9 | Yes (3) |
| 19025 | 9 | Yes (3) |
| 19026 | 9 | Yes (3) |
| 19027 | 9 | Yes (3) |
| 19028 | 9 | Yes (3) |
| 19029 | 9 | Yes (3) |
| 19030 | 1 | No |
| 19031 | 9 | Yes (3) |
| 19032 | 9 | Yes (3) |
| 19033 | 9 | Yes (3) |
| 19034 | 10 | Yes (3) |
| 19035 | 9 | Yes (3) |
| 19036 | 9 | Yes (3) |
| 19037 | 9 | Yes (3) |
| 19038 | 9 | Yes (3) |
| 19040 | 9 | Yes (4) |
| 19041 | 9 | Yes (3) |
| 19043 | 9 | Yes (3) |
| 19044 | 9 | Yes (4) |
| 19046 | 9 | Yes (3) |
| 19047 | 9 | Yes (3) |
| 19050 | 9 | Yes (3) |
| 19052 | 9 | Yes (3) |
| 19053 | 9 | Yes (3) |
| 19054 | 1 | No |
| 19055 | 2 | Yes (1) |
| 19056 | 7 | Yes (2) |
| 19057 | 2 | Yes (1) |
| 19059 | 9 | Yes (3) |
| 19060 | 6 | Yes (1) |
| 19061 | 6 | Yes (1) |
| 19063 | 9 | Yes (3) |
| 19064 | 9 | Yes (3) |
| 19065 | 9 | Yes (3) |
| 19066 | 9 | Yes (3) |
| 19067 | 6 | Yes (2) |
| 19070 | 9 | Yes (3) |
| 19072 | 9 | Yes (3) |
| 19073 | 9 | Yes (3) |
| 19074 | 9 | Yes (3) |
| 19075 | 9 | Yes (3) |
| 19076 | 9 | Yes (3) |
| 19078 | 9 | Yes (3) |
| 19079 | 9 | Yes (3) |
| 19081 | 9 | Yes (3) |
| 19082 | 9 | Yes (3) |
| 19083 | 9 | Yes (3) |
| 19085 | 9 | Yes (3) |
| 19086 | 9 | Yes (3) |
| 19087 | 9 | Yes (3) |
| 19090 | 9 | Yes (3) |
| 19094 | 9 | Yes (3) |
| 19095 | 9 | Yes (3) |
| 19096 | 9 | Yes (3) |
| 19102 | 7 | Yes (2) |
| 19103 | 7 | Yes (2) |
| 19104 | 7 | Yes (2) |
| 19106 | 7 | Yes (2) |
| 19107 | 7 | Yes (2) |
| 19111 | 7 | Yes (2) |
| 19112 | 7 | Yes (2) |
| 19113 | 9 | Yes (3) |
| 19114 | 7 | Yes (2) |
| 19115 | 7 | Yes (2) |
| 19116 | 7 | Yes (2) |
| 19118 | 7 | Yes (2) |
| 19119 | 7 | Yes (2) |
| 19120 | 7 | Yes (2) |
| 19121 | 7 | Yes (2) |
| 19122 | 7 | Yes (2) |
| 19123 | 7 | Yes (2) |
| 19124 | 7 | Yes (2) |
| 19125 | 7 | Yes (2) |
| 19126 | 7 | Yes (2) |
| 19127 | 7 | Yes (2) |
| 19128 | 7 | Yes (2) |
| 19129 | 7 | Yes (2) |
| 19130 | 7 | Yes (2) |
| 19131 | 9 | Yes (3) |
| 19132 | 7 | Yes (2) |
| 19133 | 7 | Yes (2) |
| 19134 | 7 | Yes (2) |
| 19135 | 7 | Yes (2) |
| 19136 | 7 | Yes (2) |
| 19137 | 7 | Yes (2) |
| 19138 | 7 | Yes (2) |
| 19139 | 7 | Yes (2) |
| 19140 | 7 | Yes (2) |
| 19141 | 7 | Yes (2) |
| 19142 | 7 | Yes (2) |
| 19143 | 7 | Yes (2) |
| 19144 | 7 | Yes (2) |
| 19145 | 7 | Yes (2) |
| 19146 | 7 | Yes (2) |
| 19147 | 7 | Yes (2) |
| 19148 | 7 | Yes (2) |
| 19149 | 7 | Yes (2) |
| 19150 | 7 | Yes (2) |
| 19151 | 7 | Yes (2) |
| 19152 | 7 | Yes (2) |
| 19153 | 7 | Yes (2) |
| 19154 | 7 | Yes (2) |
| 19301 | 9 | Yes (3) |
| 19311 | 4 | Yes (1) |
| 19312 | 9 | Yes (3) |
| 19317 | 9 | Yes (3) |
| 19319 | 9 | Yes (3) |
| 19320 | 9 | Yes (3) |
| 19330 | 3 | Yes (1) |
| 19331 | 3 | Yes (1) |
| 19333 | 9 | Yes (3) |
| 19335 | 9 | Yes (3) |
| 19339 | 3 | Yes (1) |
| 19340 | 9 | Yes (3) |
| 19341 | 9 | Yes (3) |
| 19342 | 9 | Yes (3) |
| 19343 | 9 | Yes (3) |
| 19344 | 5 | Yes (2) |
| 19345 | 9 | Yes (3) |
| 19346 | 3 | Yes (1) |
| 19348 | 9 | Yes (3) |
| 19350 | 9 | Yes (3) |
| 19352 | 9 | Yes (3) |
| 19353 | 5 | Yes (2) |
| 19355 | 9 | Yes (3) |
| 19357 | 3 | Yes (1) |
| 19360 | 3 | Yes (1) |
| 19362 | 3 | Yes (1) |
| 19363 | 4 | Yes (1) |
| 19365 | 2 | No |
| 19372 | 4 | Yes (1) |
| 19373 | 3 | Yes (1) |
| 19374 | 3 | Yes (1) |
| 19375 | 9 | Yes (3) |
| 19376 | 2 | No |
| 19380 | 9 | Yes (3) |
| 19381 | 9 | Yes (3) |
| 19382 | 9 | Yes (3) |
| 19383 | 9 | Yes (3) |
| 19390 | 4 | Yes (1) |
| 19395 | 9 | Yes (3) |
| 19401 | 9 | Yes (3) |
| 19403 | 9 | Yes (3) |
| 19404 | 4 | No |
| 19405 | 9 | Yes (3) |
| 19406 | 9 | Yes (3) |
| 19407 | 9 | Yes (2) |
| 19408 | 4 | No |
| 19409 | 4 | No |
| 19413 | 4 | No |
| 19421 | 5 | Yes (2) |
| 19422 | 9 | Yes (3) |
| 19424 | 4 | No |
| 19425 | 5 | Yes (2) |
| 19426 | 8 | Yes (2) |
| 19428 | 9 | Yes (3) |
| 19432 | 9 | Yes (3) |
| 19436 | 9 | Yes (2) |
| 19437 | 9 | Yes (2) |
| 19438 | 4 | Yes (1) |
| 19440 | 9 | Yes (2) |
| 19442 | 10 | Yes (3) |
| 19443 | 4 | Yes (1) |
| 19444 | 9 | Yes (3) |
| 19446 | 9 | Yes (2) |
| 19451 | 4 | Yes (1) |
| 19452 | 9 | Yes (3) |
| 19454 | 9 | Yes (3) |
| 19460 | 9 | Yes (3) |
| 19462 | 9 | Yes (3) |
| 19464 | 8 | Yes (2) |
| 19468 | 8 | Yes (2) |
| 19473 | 7 | Yes (2) |
| 19474 | 5 | Yes (1) |
| 19475 | 8 | Yes (2) |
| 19477 | 9 | Yes (2) |
| 19478 | 4 | Yes (2) |
| 19479 | 9 | Yes (3) |
| 19480 | 5 | Yes (2) |
| 19481 | 9 | Yes (3) |
| 19482 | 9 | Yes (3) |
| 19485 | 9 | Yes (3) |
| 19486 | 9 | Yes (2) |
| 19490 | 9 | Yes (2) |
| 19492 | 4 | Yes (2) |
| 19505 | 6 | Yes (2) |
| 19508 | 8 | Yes (2) |
| 19510 | 2 | No |
| 19518 | 7 | Yes (2) |
| 19520 | 5 | Yes (1) |
| 19522 | 2 | No |
| 19525 | 6 | Yes (2) |
| 19526 | 3 | No |
| 19536 | 1 | No |
| 19540 | 3 | No |
| 19543 | 8 | Yes (2) |
| 19551 | 1 | No |
| 19560 | 9 | Yes (2) |
| 19565 | 3 | Yes (1) |
| 19567 | 1 | No |
| 19601 | 4 | Yes (1) |
| 19602 | 4 | Yes (1) |
| 19603 | 4 | Yes (1) |
| 19604 | 9 | Yes (2) |
| 19605 | 9 | Yes (2) |
| 19606 | 9 | Yes (2) |
| 19607 | 6 | Yes (2) |
| 19608 | 8 | Yes (3) |
| 19609 | 3 | No |
| 19610 | 5 | Yes (1) |
| 19611 | 4 | Yes (1) |
Results are based on EPA UCMR 5 monitoring data (2023–2025), linked to ZIP codes via Public Water System Identifier. Non-detections are not present in this analytic dataset. For each compound and ZIP code, the highest observed concentration across the monitoring period is retained; this characterizes the upper bound of observed drinking-water concentrations, not a long-term average or an individual exposure estimate. A single water system may serve multiple ZIP codes, so the same monitoring record can appear for more than one ZIP in this table. ZIP-code assignment reflects water-system service area geography and does not establish individual household exposure. Private wells are not represented unless served by a monitored public water system. PFOA and PFOS are reported by detection prevalence because the UCMR 5 reporting limit equals their federal MCL. A full PFBS Hazard Index is not calculated because co-located, same-event multi-compound readings are not retained in this dataset. Lithium has no federal Maximum Contaminant Level; 7.36 µg/L is an evidence-based reference concentration from a prospective cohort study, not a regulatory threshold.
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