Is Empire City, OK tap water safe?
The short answer
3 of the 3 utilities serving Empire City have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Oklahoma’s records: Duncan Public Utilities Authority, Stephens Co RWD #5 and Jefferson Co Cons RWD #1.
Duncan Public Utilities Authority, which serves the most people here, has 1 result above the legal limit. The worst: Total trihalomethanes (TTHM) at 72.2 ppb, above the legal limit.
A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Empire City’s ZIP codes, from EPA’s estimates.
- Open report
Duncan Public Utilities Authority
Oklahoma · serves 23,000 people · about 210 in Empire City
1 result above the legal limit. The worst: Total trihalomethanes (TTHM) at 72.2 ppb, above the legal limit.
44 health-based violations since 2016
- Open report
Stephens Co RWD #5
Oklahoma · serves 6,426 people · about 170 in Empire City
1 result above the limit’s level with no violation recorded, 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Total trihalomethanes (TTHM) at 106 ppb, above the limit’s level, no violation.
1 health-based violation since 2016
- Open report
Jefferson Co Cons RWD #1
Oklahoma · serves 8,398 people · about 100 in Empire City
1 result above the legal limit, 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Total trihalomethanes (TTHM) at 68.3 ppb, above the legal limit.
16 health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Duncan Public Utilities Authority’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Aquasana Clean Water Machine (AQ-CWM2)
Countertop
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
Certified for: Total trihalomethanes (TTHM)
Brita Hub Countertop Water Filter System (87340)
Countertop
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
- IAPMO listing:NSF/ANSI 53checked Oct. 9, 2026
Certified for: Total trihalomethanes (TTHM)
Ninja HydraSense Countertop Water Filtration System (WF1001)
Countertop
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
Certified for: Total trihalomethanes (TTHM)
Water testing near Empire City
TapBuff hasn’t read Oklahoma’s list of certified labs yet. The national page links every state’s own list.
Certified labs, state by stateWhich ZIP codes are in Empire City: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology.
Near Empire City
Towns nearby with a page of their own.
What to do next
- Read Duncan Public Utilities Authority’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- About Total trihalomethanes (TTHM)What it does to health, where it comes from, and the certification claim that addresses it.About Total trihalomethanes (TTHM)
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water