What EPA records show for Southern Okla Water Corp
EPA OK1010830 · serves Carter County, OK · about 11,250 people (EPA SDWIS)
This report shows EPA's federal records for this water system: UCMR 5 testing, lead testing and violations. It isn't a test of the water at your tap, and it has no Water Score.
Public EPA test results
Southern Okla Water Corp (EPA OK1010830)
What EPA records show for Southern Okla Water Corp, as of October 14, 2026
44 health-based violations since July 1, 2021 in EPA records (EPA SDWIS).
Lead, 90th percentile: 2.94 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jan 1, 2022–Dec 31, 2024). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
EPA's UCMR 5 testing looked for 30 contaminants here and found 5.
PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing.
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026.
Your water bill names your utility.
Does Southern Okla Water Corp use chloramine?
We didn't find chloramine in Southern Okla Water Corp's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.
Reported results in EPA records (data as of Oct 14–15, 2026)
EPA's UCMR 5 testing looked for 30 contaminants here and found 5.
Lithium: found in 18 of 26 samples, average 19.4 µg/L, highest 46.4 µg/L (EPA UCMR 5 testing, Dec 2024–Sep 2025)
6:2 FTS (a PFAS): found in 1 of 26 samples, average 0.40 ppt, highest 11.2 ppt (EPA UCMR 5 testing, Dec 2024–Sep 2025)
PFBA (a PFAS): found in 1 of 26 samples, average 0.20 ppt, highest 6.4 ppt (EPA UCMR 5 testing, Dec 2024–Sep 2025)
PFPeA (a PFAS): found in 1 of 26 samples, average 0.20 ppt, highest 5.2 ppt (EPA UCMR 5 testing, Dec 2024–Sep 2025)
PFHxA (a PFAS): found in 1 of 26 samples, average 0.10 ppt, highest 3.4 ppt (EPA UCMR 5 testing, Dec 2024–Sep 2025)
Lead, 90th percentile: 2.94 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jan 1, 2022–Dec 31, 2024). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, Total Haloacetic Acids (HAA5), from Apr 2026, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Apr 2026, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Apr 2026, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 1 Disinfectants and Disinfection Byproducts Rule, CARBON, TOTAL, from Apr 2026, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Jan 2026, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, Total Haloacetic Acids (HAA5), from Jan 2026, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Jan 2026, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Jan 2026, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, Total Haloacetic Acids (HAA5), from Oct 2025, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Oct 2025, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 1 Disinfectants and Disinfection Byproducts Rule, CARBON, TOTAL, from Oct 2025, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Oct 2025, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Oct 2025, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Jul 2025, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, Total Haloacetic Acids (HAA5), from Jul 2025, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Jul 2025, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Surface Water Treatment Rules, Interim Enhanced Surface Water Treatment Rule, May 2025–Dec 2025 (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Apr 2025, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Jan 2025, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Oct 2024, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Oct 2024, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Jul 2024, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Jul 2024, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Apr 2024, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Jan 2024, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Oct 2023, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Jul 2023, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Jul 2023, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Apr 2023, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Apr 2023, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Jan 2023, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Oct 2022, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Jul 2022, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, Total Haloacetic Acids (HAA5), from Apr 2022, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Apr 2022, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Jan 2022, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Jan 2022, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, Total Haloacetic Acids (HAA5), from Jan 2022, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, Total Haloacetic Acids (HAA5), from Jan 2022, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, Total Haloacetic Acids (HAA5), from Oct 2021, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Oct 2021, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 1 Disinfectants and Disinfection Byproducts Rule, CARBON, TOTAL, from Jul 2021, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, TTHM, from Jul 2021, with no return-to-compliance action in EPA records (EPA SDWIS)
Health-based violation: Stage 2 Disinfectants and Disinfection Byproducts Rule, Total Haloacetic Acids (HAA5), from Jul 2021, with no return-to-compliance action in EPA records (EPA SDWIS)
Source: EPA SDWIS (ECHO SDWA bulk download), data as of Oct 14, 2026
Source: EPA UCMR 5 occurrence data, data as of Oct 15, 2026
These are EPA's public records for this water system, shown as of October 14, 2026. If you represent this utility, or think a record here is wrong, tell us: Report an error. If the error is in EPA's own records, your state drinking water program can correct it there, and this page updates at our next data refresh.
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