Is Dublin, OH tap water safe?
Supplied by Del-Co Water Company, Inc. · serves 150,000 people (56,000 connections) · Surface water · EPA ID OH2101412
Data: U.S. EPA · How we read the data · How we check it
Summary
No federal limits exceeded in EPA data.
- PFAS
- Detected, below limit5 of 29 PFAS found at least once. All averages below the federal limits.
- Lead
- Below action level0.82 ppb (parts per billion) at the 90th percentile: 9 in 10 homes sampled were at or below it. Action level 15 ppb, falling to 10 ppb in Nov 2027. Monitoring period ending Dec 2024. Your home's pipes can make yours higher.
- Violations
- None health-basedNo health-based violations since 2016.
- Built before 1986, or not sure what your service line is made of? Check your service line and test your tap. Utility data can't show your pipes.
- Want to reduce what was found? Filters for these results.
- Tested your own tap? Compare your result with these numbers. Moving? Compare this system with another.
- Read Del-Co Water Company, Inc.'s annual water quality report (Consumer Confidence Report). It lists every regulated contaminant tested and is usually on the utility's website or mailed with your bill, and you can also request it at (740) 201-0125. EPA: how to find it.
PFAS (“forever chemicals”)
EPA UCMR 5: 3 entry points tested Jul 2023 to Apr 2024. "Average" is the highest entry-point average (non-detects counted as zero), the way EPA compares UCMR 5 results to the limits. ppt = parts per trillion. These results do not determine compliance.
| Contaminant | Highest average |
|---|---|
| PFOA One sample above limit Limit 4 ppt | 1.05 ppt 26% of the limit |
| PFOS Not detected Limit 4 ppt | – |
| PFHxS Not detected Limit 10 ppt | – |
| PFNA Not detected Limit 10 ppt | – |
| HFPO-DA (GenX) Not detected Limit 10 ppt | – |
| Hazard Index (a combined score for PFHxS, PFNA, GenX and PFBS, where above 1 is over the limit) Detected, below limit Limit 1 | 0.0018 |
| PFBS Detected, below limit Guideline 2,000 ppt | 3.67 ppt |
| PFBA Detected, below limit Guideline 6,000 ppt | 9.2 ppt |
| PFHxA Detected, below limit Guideline 3,000 ppt | 7.13 ppt |
| PFPeA Detected, no limit | 5.72 ppt |
29 PFAS tested, 5 detected at least once. "Not detected" means below EPA's reporting limit (about 2 to 20 ppt depending on the chemical), not proven zero. PFAS not listed were not detected. The limits for PFHxS, PFNA, GenX and the Hazard Index were proposed for rescission in May 2026. That proposal is not final. Systems have until 2029 to meet the limits.
Lithium
Detected in 2 of 10 samples. Highest result 12.9 ppb. EPA's non-enforceable screening level is 10 ppb. Below screening level The screening level is how EPA decides what to study further, not a health limit. There is no federal limit for lithium and no filter is certified to remove it. About lithium.
Lead and copper
Latest 90th percentile: 0.82 ppb lead (Jan 2022 – Dec 2024). Below action level
Highest since 2016: 5.9 ppb (Dec 2018).
| Monitoring period | Lead (90th pct.) |
|---|---|
| Jan 2022 – Dec 2024 | 0.82 ppb |
| Jan 2019 – Dec 2021 | 2.21 ppb |
| Jan 2016 – Dec 2018 | 5.9 ppb |
Earlier results (6)
| Jan 2013 – Dec 2015 | 0 ppb |
| Jan 2010 – Dec 2012 | 2.3 ppb |
| Jan 2008 – Dec 2010 | 0 ppb |
| Jan 2005 – Dec 2007 | 3.4 ppb |
| Jan 2002 – Dec 2004 | 4.5 ppb |
| Jan 2001 – Dec 2003 | 4.5 ppb |
Lead comes from pipes and fixtures, not the source water, so it varies home to home. The 90th percentile means 9 in 10 sampled homes were at or below it. More on lead.
Violations
Health-based violations mean a contaminant exceeded a limit or a required treatment step was missed. Monitoring and reporting violations mean required tests or reports were late or missing, so the water's quality during that time is unknown. The total includes every violation in EPA's records, most of them paperwork.
Earlier EPA testing (2013–2020)
| Contaminant | Highest | Guideline |
|---|---|---|
| Manganese | 2 ppb | 300 ppb |
| Chlorate | 2,100 ppb | 210 ppb |
| Vanadium | 0.35 ppb | 21 ppb |
| Molybdenum | 28 ppb | 40 ppb |
| Chromium-6 | 0.75 ppb | – |
| Strontium | 2.6 ppm | 1.5 ppm |
Where it serves
Dublin, Elyria, New Albany, Westerville, Powell, Worthington, Iberia, Kilbourne, Chesterville, Fulton, Sparta
39 ZIP codes the system reported serving
40233, 43003, 43011, 43015, 43016, 43017, 43019, 43021, 43031, 43032, 43035, 43040, 43050, 43054, 43061, 43064, 43065, 43066, 43074, 43081, 43082, 43085, 43086, 43209, 43235, 43301, 43302, 43314, 43315, 43317, 43320, 43321, 43325, 43334, 43338, 43350, 43356, 44035, 44833
Nearby utilities
- Columbus Public Water System Columbus · 12 mi
- Springfield City Public Water System Springfield · 37 mi
- Yellow Springs Village Public Water System Yellow Springs · 45 mi · PFAS above limit
- Wright-Patterson AFB Area A Public Water System Wright-Patterson AFB · 52 mi · PFAS above limit
- Wright-Patterson AFB Area B Public Water System Wright-Patterson AFB · 52 mi · PFAS above limit
- Mansfield City Water System Mansfield · 56 mi
Questions
Is Dublin tap water safe to drink?
Most of Dublin gets its water from Del-Co Water Company, Inc.. Del-Co Water Company, Inc. has no health-based violations since 2016. EPA testing found no PFAS above the federal limits. Federal data can't tell you about your own pipes: lead comes from service lines and plumbing, so test your tap if your home was built before 1986. For the official word, read the utility's annual Consumer Confidence Report.
Does Dublin water have PFAS?
Yes. EPA's 2023–2025 testing of Del-Co Water Company, Inc. found 5 PFAS at least once. None of the averages were above the federal limits.
What is the lead level in Dublin water?
The most recent 90th-percentile lead result for Del-Co Water Company, Inc. is 0.82 ppb, for the period ending Dec 2024. The federal action level is 15 ppb, falling to 10 ppb in November 2027. The 90th percentile means 9 in 10 homes sampled were at or below this number. Individual homes can be higher.
Check these numbers yourself
Every figure on this page comes from public EPA records. You don't have to take our word for it:
- EPA's own report for OH2101412: violations, enforcement and inspections, straight from EPA.
- EPA UCMR 5 data: the PFAS and lithium results (search the file for PWSID OH2101412).
- EPA SDWIS download: the lead results, population and violation records we use.
- The utility's annual water quality report (Consumer Confidence Report): ask Del-Co Water Company, Inc. at (740) 201-0125, or see EPA's guide to finding it.
Found something that doesn't match? Tell us and we'll check it against EPA's records. How we check our data.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.