Tapcensus

Tryon

Community water system in Lincoln County, Oklahoma, serving 448 people from ground water. 11 rules violated in the past three years, 4 still unresolved. Owned by local government.

People served 448 ground water
Rules violated, past 3 years 11 one rule can carry several violations
Unresolved 4 rules still in violation, EPA data updated Oct 7, 2026
Quarters with violations 12 of the last 12 quarters

Quarterly compliance history

SQ3
2023
SQ4
2023
SQ1
2024
SQ2
2024
SQ3
2024
SQ4
2024
SQ1
2025
SQ2
2025
SQ3
2025
SQ4
2025
VQ1
2026
VQ2
2026
UQ3
2026
–No violation identified VViolation identified SSerious violator (EPA enforcement priority) UUndetermined Oldest quarter on the left. Quarters 1 to 12 are the twelve most recent official quarters at EPA's last data refresh; the 13th is the quarter in progress at that refresh, which EPA reports as undetermined.

Still in violation

EPA data updated Oct 7, 2026

Ground Water Rule

Monitoring and Reporting

3 violations, Jan 2024 to open · E. coli (Escherichia coli)
EPA rule code 140 · 3 violations recorded, 3 still open

Monitoring and Reporting: 3 violations, open since Jan 2024. The system did not complete required monitoring, or did not report the results on time. This does not show that a contaminant was found.

Contaminant on the record: E. coli (Escherichia coli).

Lead and Copper Rule

Monitoring and Reporting

1 violation, Oct 2025 to open
EPA rule code 350 · 1 violation recorded, 1 still open

Monitoring and Reporting: 1 violation, open since Oct 2025. The system did not complete required monitoring, or did not report the results on time. This does not show that a contaminant was found.

What the rule requires: The 1991 LCR uses action levels rather than MCLs: if the 90th percentile of high-risk tap samples exceeds 15 ppb lead or 1.3 mg/L copper, the system must take escalating corrective actions. Violations typically indicate failure to maintain adequate corrosion control — the treatment that keeps lead from leaching out of pipes, solder, and fixtures.

About this rule

Lead and Copper Rule Revisions

Reporting ViolationTreatment Technique Violation Health-based

2 violations, Oct 2024 to open
EPA rule code 351 · 2 violations recorded, 2 still open, 1 health-based

Treatment Technique Violation, health-based: 1 violation, open since Oct 2024. The system did not carry out a required treatment process or corrective action.

Reporting Violation: 1 violation, open since Oct 2024. The system did not report required information on time.

What the rule requires: The 2021 LCRR updated the 1991 LCR with mandatory lead service line inventories and replacement planning, a new 'trigger level' at 10 ppb requiring optimization, and strengthened public education. The 2024 Lead and Copper Rule Improvements (LCRI) further requires replacing all lead service lines within 10 years.

Health effects: Same as Lead and Copper Rule (5000). Violations typically reflect failure to complete the required lead service line inventory or submit a required replacement plan. Lead service lines are the primary source of lead at the tap in many older systems. Limit: Lead action level: 15 ppb (trigger level: 10 ppb); copper action level: 1.3 mg/L

About this rule

Public Notice Rule and Revised PN Rule

Other Violation

1 violation, Oct 2025 to open · Public Notification Rule
EPA rule code 410 · 1 violation recorded, 1 still open

Other Violation: 1 violation, open since Oct 2025. A requirement other than monitoring, reporting, or a contaminant limit, such as public notice or the annual water quality report.

Contaminant on the record: Public Notification Rule.

Also violated in the past three years

Jul to Sep 2023 to Jul to Sep 2026

Revised Total Coliform Rule

Monitoring Violation

11 violations, Sep 2023 to May 2026
EPA rule code 111 · 11 violations recorded

Monitoring Violation: 11 violations, Sep 2023 to May 2026. The system did not complete required monitoring. This does not show that a contaminant was found.

What the rule requires: The 2013 RTCR (effective 2016) replaced the original TCR. It triggers automatic E. coli testing whenever total coliform is found. A single E. coli-positive sample is an acute MCL violation. It also requires systems exceeding 5% total coliform-positive samples to conduct a formal assessment and correct any deficiencies, helping prevent contamination before it escalates.

About this rule

Stage 1 Disinfectants and Disinfection Byproducts Rule

Monitoring and Reporting

13 violations, Jul 2023 to May 2026 · Chlorine (MRDL)
EPA rule code 210 · 13 violations recorded

Monitoring and Reporting: 13 violations, Jul 2023 to May 2026. The system did not complete required monitoring, or did not report the results on time. This does not show that a contaminant was found.

Contaminant on the record: Chlorine (MRDL).

Stage 2 Disinfectants and Disinfection Byproducts Rule

Monitoring and Reporting

2 violations, Jan 2023 to Dec 2025 · 2 contaminants
EPA rule code 220 · 2 violations recorded

Monitoring and Reporting: 2 violations, Jan 2023 to Dec 2025. The system did not complete required monitoring, or did not report the results on time. This does not show that a contaminant was found.

Contaminants on the record: Total Haloacetic Acids (HAA5), TTHM (Total Trihalomethanes).

Arsenic Rule

Monitoring and Reporting

2 violations, Jan 2023 to Dec 2025
EPA rule code 332 · 2 violations recorded

Monitoring and Reporting: 2 violations, Jan 2023 to Dec 2025. The system did not complete required monitoring, or did not report the results on time. This does not show that a contaminant was found.

What the rule requires: Arsenic is a naturally occurring metalloid found in bedrock and soil. It dissolves into groundwater from natural deposits and can also come from mining, smelting and past pesticide use. EPA lowered the MCL from 50 ppb to 10 ppb in 2001.

About this rule

Nitrate Rule

Monitoring and Reporting

6 violations, Jan 2023 to Dec 2025 · Nitrate-Nitrite (Combined)
EPA rule code 331 · 6 violations recorded

Monitoring and Reporting: 6 violations, Jan 2023 to Dec 2025. The system did not complete required monitoring, or did not report the results on time. This does not show that a contaminant was found.

Contaminant on the record: Nitrate-Nitrite (Combined).

Radionuclides and Revised Rad Rule

Monitoring and Reporting

8 violations, Jan 2023 to Dec 2025 · 4 contaminants
EPA rule code 340 · 8 violations recorded

Monitoring and Reporting: 8 violations, Jan 2023 to Dec 2025. The system did not complete required monitoring, or did not report the results on time. This does not show that a contaminant was found.

Contaminants on the record: Gross Alpha, Excl. Radon and U, Combined Uranium, Combined Radium (-226 and -228), Gross Beta Particle Activity.

Consumer Confidence Rule

Other Violation

1 violation, Jul 2025 to Nov 2025
EPA rule code 420 · 1 violation recorded

Other Violation: 1 violation, Jul 2025 to Nov 2025. A requirement other than monitoring, reporting, or a contaminant limit, such as public notice or the annual water quality report.

What the rule requires: Community water systems must deliver an annual water quality report (Consumer Confidence Report) to all customers by July 1, covering the previous year. It must list all detected contaminants, compare them to MCLs, identify source water, and include educational language about lead. A violation means the report was not delivered on time or was incomplete.

About this rule
About this data

Rules violated and the list above come from EPA's SDWIS violation records, one row per violation and contaminant, grouped by the rule each row belongs to. A violation counts when its non-compliance period ended on or after Jul 1, 2023, the start of the thirteen quarters ECHO's three-year figures cover, or is still open; it is unresolved when it was still open at EPA's data refresh on Oct 7, 2026. EPA's rule code 500, "Not Regulated", is left out, as in ECHO's counts. Each rule's violation count is EPA's, and one rule can carry several: a missed monitoring round for a group of contaminants is one violation per contaminant and period. Category names are EPA's violation categories.

ECHO's own summary count of rules violated agrees with this grouping for 98.8% of active systems nationally, and its count of rules being violated for 98.7%; where they differ, the figures here follow the rows listed.

Measured contaminant levels are not part of this record; each system publishes them in its annual Consumer Confidence Report.

Service area from EPA's Public Water System Service Area Boundaries dataset: State agency. The system's location is the centre of the service area EPA publishes for the system.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Oklahoma records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.