Tapcensus

Mesa Mobile Park

Community water system in La Plata County, Colorado, serving 30 people from surface water purchased. 5 rules violated in the past three years, 1 still unresolved. Privately owned.

People served 30 surface water purchased
Rules violated, past 3 years 5 one rule can carry several violations
Unresolved 1 rules currently in violation, EPA data updated Oct 7, 2026
Quarters with violations 3 of the last 12 quarters

Quarterly compliance history

–Q3
2023
–Q4
2023
–Q1
2024
–Q2
2024
–Q3
2024
–Q4
2024
–Q1
2025
–Q2
2025
–Q3
2025
–Q4
2025
VQ1
2026
VQ2
2026
VQ3
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.

Currently in violation

EPA data updated Oct 7, 2026

Public Notice Rule and Revised PN Rule

Other Violation

1 violation, Jun 2026 to open · Public Notification Rule
EPA rule code 410 · 1 violation recorded, 1 still open

Other Violation: 1 violation, open since Jun 2026. 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

2 violations, Mar 2026 to May 2026
EPA rule code 111 · 2 violations recorded

Monitoring Violation: 2 violations, Mar 2026 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

Long Term 2 Enhanced Surface Water Treatment Rule

Monitoring and Reporting

1 violation, Apr 2026 to May 2026
EPA rule code 123 · 1 violation recorded

Monitoring and Reporting: 1 violation, Apr 2026 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.

What the rule requires: The LT2 ESWTR (2006) required all surface water and GWUDI systems to monitor source water for Cryptosporidium, then apply additional treatment based on measured concentrations. Higher-bin systems (more oocysts detected) must install advanced treatment — UV disinfection, ozone, or membrane filtration — beyond the original SWTR requirements.

About this rule

Surface Water Treatment Rule

Monitoring and Reporting

1 violation, Mar 2026 to May 2026
EPA rule code 121 · 1 violation recorded

Monitoring and Reporting: 1 violation, Mar 2026 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.

What the rule requires: All systems using surface water (rivers, lakes, reservoirs) or groundwater under surface influence (GWUDI) must filter and disinfect. Treatment technique violations mean the system failed to maintain adequate disinfectant residual, exceeded turbidity limits, or lacked required permits. Snowmelt and storm events can raise turbidity and pathogen loads in surface water.

About this rule

Stage 1 Disinfectants and Disinfection Byproducts Rule

Monitoring and ReportingTreatment Technique Violation Health-based

3 violations, Jan 2026 to May 2026 · 2 contaminants
EPA rule code 210 · 3 violations recorded, 1 health-based

Treatment Technique Violation, health-based: 1 violation, Apr 2026 to May 2026. The system did not carry out a required treatment process or corrective action.

Monitoring and Reporting: 2 violations, Jan 2026 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.

Contaminants on the record: Stage 1 Disinfectants and DBP Rule, Chlorine (MRDL).

Stage 1 Disinfectants and DBP Rule, health effects: See TTHMs (2950) and HAA5 (2456) for their specific health effects. Bromate is a probable human carcinogen (Group B2). Chlorite at elevated levels can cause hemolytic anemia, particularly in infants, developing fetuses, and individuals with certain enzyme deficiencies. Violations indicate the system exceeded one or more of these byproduct or disinfectant limits. Limit: TTHM: 0.080 mg/L; HAA5: 0.060 mg/L; Bromate: 0.010 mg/L; Chlorite: 1.0 mg/L

Chlorine (MRDL), health effects: Acute high-dose exposure to chlorinated water can cause eye and nose irritation, stomach discomfort, and nausea. Chronic exposure above the MRDL is primarily a concern because elevated chlorine accelerates formation of trihalomethanes and haloacetic acids, which are associated with increased cancer risk over time. Limit: MRDL: 4.0 mg/L as an annual average

Lead and copper at the tap

The 90th percentile of the tap samples the system collected in its latest monitoring period, against EPA's action level. Levels vary between homes.

Lead 0.0005 mg/L

Action level 0.015 mg/L · Jan to Jun 2026

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.

A measured value shown with a rule is the sample result EPA recorded with that violation (SDWIS viol_measure), against the limit EPA recorded on the same row (state_mcl), both in EPA's unit as written; violations without a recorded value, such as missed monitoring, show none. Other measured contaminant levels are not part of this record; each system publishes them in its annual Consumer Confidence Report.

Lead and copper are the newest 90th-percentile results in EPA's SDWA data download (LCR_SAMPLES, codes PB90 and CU90): for each monitoring period a system reports the 90th-percentile value of its tap samples, which EPA compares with its action level of 0.015 mg/L for lead and 1.3 mg/L for copper (40 CFR 141.80). A result is not a measurement of any one tap.

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 Colorado 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.