Tapcensus

Jefferson School District NO 1

Non-Transient non-community system in Glendive, Dawson County, Montana, serving 270 people from surface water purchased. 2 rules violated in the past three years, 1 still unresolved. Owned by local government.

People served 270 surface water purchased
Rules violated, past 3 years 2 one rule can carry several violations
Unresolved 1 rules still in violation, EPA data updated Oct 7, 2026
Quarters with violations 10 of the last 12 quarters

Quarterly compliance history

VQ4
2023
VQ1
2024
VQ2
2024
VQ3
2024
VQ4
2024
VQ1
2025
VQ2
2025
VQ3
2025
VQ4
2025
–Q1
2026
–Q2
2026
–Q3
2026
VQ4
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 (LCR)

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…
EPA rule code 5000 · Treatment Technique

What it means: 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.

Health effects: Lead: no safe level for children. Causes irreversible neurological damage, impaired cognitive development, behavioral problems, and reduced IQ in children under 6. In adults: hypertension, cardiovascular disease, kidney damage. Copper: acute gastrointestinal distress at high levels; liver/kidney damage at very high chronic levels.

Limit: Action levels: lead 15 ppb, copper 1.3 mg/L — 90th percentile of tap samples at high-risk sites

About this rule

Also violated in the past three years

Oct to Dec 2023 to Oct to Dec 2026

Revised Total Coliform Rule (RTCR)

The 2013 RTCR (effective 2016) replaced the original TCR.
EPA rule code 8000 · Microbial

What it means: 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.

Health effects: Total coliform bacteria indicate that the disinfection barrier has been breached or fecal contamination is entering the system. E. coli specifically indicates fecal contamination and the possible presence of disease-causing pathogens (norovirus, Salmonella, Shigella, Campylobacter). Illness can be severe in elderly, young children, and immunocompromised individuals.

Limit: Zero E. coli; ≤5% of monthly samples total coliform-positive

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: location confidence HIGHER. 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 Montana 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.