Lake Pump System
Non-Transient non-community system in Boulder County, Colorado, serving 161 people from surface water. 11 rules violated in the past three years, 5 still unresolved. Privately owned.
Quarterly compliance history
2026
2026
2026
Currently in violation
EPA data updated Oct 7, 2026
Revised Total Coliform Rule
Monitoring ViolationOther Violation
7 violations, Jul 2023 to open
Revised Total Coliform Rule
Monitoring ViolationOther Violation7 violations, Jul 2023 to open
Other Violation: 1 violation, open since Jul 2023. A requirement other than monitoring, reporting, or a contaminant limit, such as public notice or the annual water quality report.
Monitoring Violation: 6 violations, Jul 2023 to Dec 2023. 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 ReportingTreatment Technique Violation
Health-based
3 violations, Jul 2023 to open · 2 contaminants
Stage 1 Disinfectants and Disinfection Byproducts Rule
Monitoring and ReportingTreatment Technique Violation Health-based3 violations, Jul 2023 to open · 2 contaminants
Treatment Technique Violation, health-based: 1 violation, open since Jul 2023. The system did not carry out a required treatment process or corrective action.
Monitoring and Reporting: 2 violations, Jul 2023 to Dec 2023. 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
Stage 2 Disinfectants and Disinfection Byproducts Rule
Monitoring and Reporting
5 violations, Jul 2023 to open · 3 contaminants
Stage 2 Disinfectants and Disinfection Byproducts Rule
Monitoring and Reporting5 violations, Jul 2023 to open · 3 contaminants
Monitoring and Reporting: 5 violations, 1 still open, Jul 2023 to open. 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 2 Disinfectants and Disinfection Byproducts Rule, Total Haloacetic Acids (HAA5), TTHM (Total Trihalomethanes).
Lead and Copper Rule
Monitoring and Reporting
1 violation, Jan 2024 to open
Lead and Copper Rule
Monitoring and Reporting1 violation, Jan 2024 to open
Monitoring and Reporting: 1 violation, 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.
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
Public Notice Rule and Revised PN Rule
Other Violation
11 violations, Aug 2023 to open · Public Notification Rule
Public Notice Rule and Revised PN Rule
Other Violation11 violations, Aug 2023 to open · Public Notification Rule
Other Violation: 11 violations, open since Aug 2023. 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
Jan to Mar 2026 to Jul to Sep 2026
Surface Water Treatment Rule
Monitoring and Reporting
5 violations, Jul 2023 to Dec 2023
Surface Water Treatment Rule
Monitoring and Reporting5 violations, Jul 2023 to Dec 2023
Monitoring and Reporting: 5 violations, Jul 2023 to Dec 2023. 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
Volatile Organic Chemicals
Monitoring and Reporting
42 violations, Jul 2023 to Dec 2023 · 21 contaminants
Volatile Organic Chemicals
Monitoring and Reporting42 violations, Jul 2023 to Dec 2023 · 21 contaminants
Monitoring and Reporting: 42 violations, Jul 2023 to Dec 2023. 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: 1,2,4-Trichlorobenzene, cis-1,2-Dichloroethylene, Xylenes, Total, Dichloromethane (Methylene Chloride), o-Dichlorobenzene, p-Dichlorobenzene, Vinyl Chloride, 1,1-Dichloroethylene, trans-1,2-Dichloroethylene, 1,2-Dichloroethane, 1,1,1-Trichloroethane, Carbon Tetrachloride, 1,2-Dichloropropane, Trichloroethylene (TCE), 1,1,2-Trichloroethane, Tetrachloroethylene (PCE), Chlorobenzene, Benzene, Toluene, Ethylbenzene, Styrene.
Synthetic Organic Chemicals
Monitoring and Reporting
59 violations, Jul 2023 to Dec 2023 · 31 contaminants
Synthetic Organic Chemicals
Monitoring and Reporting59 violations, Jul 2023 to Dec 2023 · 31 contaminants
Monitoring and Reporting: 59 violations, Jul 2023 to Dec 2023. 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: Endrin, BHC-Gamma (Lindane), Methoxychlor, Toxaphene, Dalapon, Diquat, Endothall, Di(2-ethylhexyl) Adipate, Oxamyl (Vydate), Simazine, Di(2-ethylhexyl) Phthalate, Picloram, Dinoseb, Hexachlorocyclopentadiene, Aldicarb Sulfoxide, Aldicarb Sulfone, Carbofuran, Aldicarb, Atrazine, Alachlor (Lasso), Heptachlor, Heptachlor Epoxide, 2,4-D, 2,4,5-TP (Silvex), Hexachlorobenzene, Benzo(a)pyrene, Pentachlorophenol, Polychlorinated Biphenyls (PCBs), 1,2-Dibromo-3-Chloropropane (DBCP), Ethylene Dibromide (EDB), Chlordane.
Arsenic Rule
Monitoring and Reporting
2 violations, Jul 2023 to Dec 2023
Arsenic Rule
Monitoring and Reporting2 violations, Jul 2023 to Dec 2023
Monitoring and Reporting: 2 violations, Jul 2023 to Dec 2023. 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
Inorganic Chemicals
Monitoring and Reporting
20 violations, Jul 2023 to Dec 2023 · 10 contaminants
Inorganic Chemicals
Monitoring and Reporting20 violations, Jul 2023 to Dec 2023 · 10 contaminants
Monitoring and Reporting: 20 violations, Jul 2023 to Dec 2023. 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: Barium, Cadmium, Chromium, Fluoride, Mercury, Nickel, Selenium, Antimony, Beryllium, Thallium.
Nitrate Rule
Monitoring and Reporting
3 violations, Jan 2023 to Dec 2023 · 2 contaminants
Nitrate Rule
Monitoring and Reporting3 violations, Jan 2023 to Dec 2023 · 2 contaminants
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.
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.