Tapcensus

Tranquillity Irrigation District

Community water system in Fresno County, California, serving 686 people from ground water. 3 rules violated in the past three years, 1 still unresolved. Owned by local government.

People served 686 ground water
Rules violated, past 3 years 3 one rule can carry several violations
Unresolved 1 rules still in violation, EPA data updated Oct 7, 2026
Quarters with violations 7 of the last 12 quarters

Quarterly compliance history

–Q4
2023
–Q1
2024
–Q2
2024
–Q3
2024
–Q4
2024
VQ1
2025
VQ2
2025
VQ3
2025
VQ4
2025
VQ1
2026
VQ2
2026
VQ3
2026
UQ4
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 recently completed quarters at EPA's last data refresh; the 13th is the current quarter up to that date, which EPA reports as undetermined.

Still in violation

EPA data updated Oct 7, 2026

Lead and Copper Rule Revisions (LCRR)

The 2021 LCRR updated the 1991 LCR with mandatory lead service line inventories and replacement planning, a new 'trigger level' at 10 ppb requiring…
EPA rule code 5200 · Treatment Technique

What it means: 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

Also violated in the past three years

Oct to Dec 2023 to Oct to Dec 2026

Arsenic

Arsenic is a naturally occurring metalloid found in bedrock and soil.
EPA rule code 1005 · Inorganic Chemical

What it means: 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.

Health effects: Long-term arsenic exposure increases risk of bladder, lung, and skin cancers. It is also associated with cardiovascular disease, type 2 diabetes, and developmental effects in children. Arsenic is classified as a Group A human carcinogen by the EPA.

Limit: 0.010 mg/L (10 ppb), set in 2001 and enforceable since 2006; the previous MCL was 0.050 mg/L (50 ppb)

About this contaminant
About this data

EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several in the same period. Unresolved means still in violation at EPA's latest data refresh. 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, verification status Not Verified. 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 California 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.