Peoria County Water Quality
Peoria County, Illinois: one city report built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.
Highest result for each contaminant
One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.
LithiumIL AMERICAN-PEORIA10 µg/L EPA health reference level (screening, not a legal limit) · US EPA20.8 µg/L
- IL AMERICAN-PEORIA20.8 µg/LSample date: 2023-11-01 to 2024-08-01
Perfluorooctanesulfonic acid (PFOS)IL AMERICAN-PEORIA4.0 ng/L federal MCL (2024) · US EPA6.5 ng/L
- IL AMERICAN-PEORIA6.5 ng/LSample date: 2023-11-01 to 2024-08-01
Lead (90th percentile)IL AMERICAN-PEORIA15 µg/L federal action level · US EPA11 µg/L
- IL AMERICAN-PEORIA11 µg/LMonitoring period: 2026–2026 (still open)
Perfluorobutanesulfonic acid (PFBS)IL AMERICAN-PEORIA2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPA4.8 ng/L
- IL AMERICAN-PEORIA4.8 ng/LSample date: 2023-11-01 to 2024-08-01
Perfluorohexanoic acid (PFHxA)IL AMERICAN-PEORIA400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLE7.4 ng/L
- IL AMERICAN-PEORIA7.4 ng/LSample date: 2023-11-01 to 2024-08-01
Perfluorobutanoic acid (PFBA)IL AMERICAN-PEORIANo federal or state limit; shown for transparency8.8 ng/L
- IL AMERICAN-PEORIA8.8 ng/LSample date: 2023-11-01 to 2024-08-01
Perfluoropentanoic acid (PFPeA)IL AMERICAN-PEORIANo federal or state limit; shown for transparency7.5 ng/L
- IL AMERICAN-PEORIA7.5 ng/LSample date: 2023-11-01 to 2024-08-01
24 PFAS tested, none detected in this systemShow
Tested in this system: IL AMERICAN-PEORIA
- 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
- 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
- 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
- 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
- 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
- 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
- Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
- N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
- N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
- Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
- Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
- Perfluoro-3-methoxypropanoic acid (PFMPA)
- Perfluoro-4-methoxybutanoic acid (PFMBA)
- Perfluorodecanoic acid (PFDA)
- Perfluorododecanoic acid (PFDoA)
- Perfluoroheptanesulfonic acid (PFHpS)
- Perfluoroheptanoic acid (PFHpA)
- Perfluorohexanesulfonic acid (PFHxS)
- Perfluorononanoic acid (PFNA)
- Perfluorooctanoic acid (PFOA)
- Perfluoropentanesulfonic acid (PFPeS)
- Perfluorotetradecanoic acid (PFTA)
- Perfluorotridecanoic acid (PFTrDA)
- Perfluoroundecanoic acid (PFUnA)
Cities ranked by the records
Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.
0of 1 city above the 15 µg/L action level
Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.
Lead in IllinoisLargest water systems
- PeoriaIL AMERICAN-PEORIA · IL1435030137,575 served
Frequently asked
How does Peoria County tap water compare across cities?
PurityMap ranks 1 city in Peoria County by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Peoria's main water system: IL AMERICAN-PEORIA · PWSID IL1435030 · Purity Score 53 (Poor) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.
How many Peoria County cities had a PFAS sample above a 2024 EPA limit?
1 of 1 Peoria County city report had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Peoria (PFOS 6.5 ng/L). That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation. PFAS were detected at any level in 1.
Is there lead in Peoria County tap water?
Utilities report lead as a 90th-percentile result from home taps. 1 of 1 Peoria County cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.
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