Trumbull County Water Quality: 3 Cities Ranked by the Records
Trumbull County, Ohio: 3 city reports 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.
Perfluorooctanesulfonic acid (PFOS)Detected in 2 systems of 3 tested4.0 ng/L federal MCL (2024) · US EPAHighest20.1 ng/L
- GIRARD CITY20.1 ng/LSample date: 2023-11-01 to 2024-08-12
- NILES CITY PWS9 ng/LSample date: 2024-07-31 to 2025-05-01
- WARREN CITY PWSNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-10-24 to 2024-07-10
Perfluorohexanesulfonic acid (PFHxS)Detected in 2 systems of 3 tested10 ng/L federal MCL (2024) · US EPAHighest10.3 ng/L
- GIRARD CITY10.3 ng/LSample date: 2023-11-01 to 2024-08-12
- NILES CITY PWS3.6 ng/LSample date: 2024-07-31 to 2025-05-01
- WARREN CITY PWSNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-10-24 to 2024-07-10
Lead (90th percentile)Detected in 2 systems of 3 tested15 µg/L federal action level · US EPAHighest3.7 µg/L
- WARREN CITY PWS3.7 µg/LMonitoring period: 2025–2025
- NILES CITY PWS1.01 µg/LMonitoring period: 2026–2026 (still open)
- GIRARD CITYNot detectedMonitoring period: 2025–2025
Perfluorobutanesulfonic acid (PFBS)Detected in 1 system of 3 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest3.4 ng/L
- GIRARD CITY3.4 ng/LSample date: 2023-11-01 to 2024-08-12
- NILES CITY PWSNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-07-31 to 2025-05-01
- WARREN CITY PWSNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-10-24 to 2024-07-10
Perfluorohexanoic acid (PFHxA)Detected in 1 system of 3 tested400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLEHighest3 ng/L
- GIRARD CITY3 ng/LSample date: 2023-11-01 to 2024-08-12
- NILES CITY PWSNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-07-31 to 2025-05-01
- WARREN CITY PWSNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-10-24 to 2024-07-10
Perfluorobutanoic acid (PFBA)Detected in 3 systemsNo federal or state limit; shown for transparencyHighest9.8 ng/L
- WARREN CITY PWS9.8 ng/LSample date: 2023-10-24 to 2024-07-10
- GIRARD CITY7.5 ng/LSample date: 2023-11-01 to 2024-08-12
- NILES CITY PWS5.9 ng/LSample date: 2024-07-31 to 2025-05-01
25 substances tested, none detected in any systemShow
Tested in these 3 systems: GIRARD CITY, NILES CITY PWS, WARREN CITY PWS
- 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)
- Lithium
- 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)
- Perfluorononanoic acid (PFNA)
- Perfluorooctanoic acid (PFOA)
- Perfluoropentanesulfonic acid (PFPeS)
- Perfluoropentanoic acid (PFPeA)
- 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 3 cities 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 OhioLargest water systems
Frequently asked
How does Trumbull County tap water compare across cities?
PurityMap ranks 3 cities in Trumbull 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 Warren's main water system: WARREN CITY PWS · PWSID OH7803811 · Purity Score 96 (Excellent) · 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 Trumbull County cities had a PFAS sample above a 2024 EPA limit?
2 of 3 Trumbull County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Girard (PFOS 20.1 ng/L), Niles (PFOS 9 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 3.
Is there lead in Trumbull County tap water?
Utilities report lead as a 90th-percentile result from home taps. 2 of 3 Trumbull 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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