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Non-Transient Non-Community Water System · PWS MT0004519

Storybook Hollow

Billings, Montana 59101 - drinking water served from groundwater sources to 70 people, tracked in EPA SDWIS and UCMR5.

70
People served
134
EPA violations
35
Health-based
Untested
UCMR5 result

The verdict

EPA records 134 drinking-water violations at Storybook Hollow, 26% of them health-based - above the Montana per-system average.

134
Total EPA violations on record
26%
Health-based (MCL / treatment failure)
70
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Storybook Hollow

Storybook Hollow is a private-owned non-transient non-community water system that delivers drinking water to 70 residents in Billings, Montana (Yellowstone County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 134 total violations for this system , of which 35 (26%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 99 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Nitrate-Nitrite, recorded in 16 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Montana, EPA tracks 2,263 public water systems serving 1,112,267 people, with 297,270 cumulative violations and 25,922 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 131.4 violations. Statewide, 5 of 45 UCMR5-tested systems have reported PFAS detections (11.1%).

Storybook Hollow's 134 violations sit above the Montana average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
70
Total Violations
134
Health-Based Violations
35
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
1
County
Yellowstone
School/Daycare
Yes
MCL Violations
30
Monitoring Violations
99
Treatment Tech Violations
5

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate-Nitrite MCL 16 2013
Coliform (TCR) MCL 14 2009
Lead and Copper Rule MR 11 2021
Lead and Copper Rule TT 5 2007
Coliform (TCR) MR 4 2006
Xylenes, Total MR 4 2008
DICHLOROMETHANE MR 4 2008
o-Dichlorobenzene MR 4 2008
1,1-Dichloroethylene MR 4 2008
trans-1,2-Dichloroethylene MR 4 2008
1,2-Dichloroethane MR 4 2008
Carbon tetrachloride MR 4 2008
1,2-Dichloropropane MR 4 2008
Trichloroethylene MR 4 2008
1,1,2-Trichloroethane MR 4 2008
Tetrachloroethylene MR 4 2008
Benzene MR 4 2008
Styrene MR 4 2008
Toluene MR 4 2008
CHLOROBENZENE MR 4 2008
1,1,1-Trichloroethane MR 4 2008
Vinyl chloride MR 4 2008
cis-1,2-Dichloroethylene MR 4 2008
p-Dichlorobenzene MR 4 2008
1,2,4-Trichlorobenzene MR 4 2008
Ethylbenzene MR 4 2008

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Storybook Hollow.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID MT0004519 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Montana Drinking Water Authority

Montana's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find MT regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2021 Lead and Copper Rule MR 11 SDWIS / MT0004519 / 5000
2013 Nitrate-Nitrite MCL 16 SDWIS / MT0004519 / 1038
2009 Coliform (TCR) MCL 14 SDWIS / MT0004519 / 3100
2008 Xylenes, Total MR 4 SDWIS / MT0004519 / 2955
2008 DICHLOROMETHANE MR 4 SDWIS / MT0004519 / 2964
2008 o-Dichlorobenzene MR 4 SDWIS / MT0004519 / 2968
2008 1,1-Dichloroethylene MR 4 SDWIS / MT0004519 / 2977
2008 trans-1,2-Dichloroethylene MR 4 SDWIS / MT0004519 / 2979
2008 1,2-Dichloroethane MR 4 SDWIS / MT0004519 / 2980
2008 Carbon tetrachloride MR 4 SDWIS / MT0004519 / 2982
2008 1,2-Dichloropropane MR 4 SDWIS / MT0004519 / 2983
2008 Trichloroethylene MR 4 SDWIS / MT0004519 / 2984
2008 1,1,2-Trichloroethane MR 4 SDWIS / MT0004519 / 2985
2008 Tetrachloroethylene MR 4 SDWIS / MT0004519 / 2987
2008 Benzene MR 4 SDWIS / MT0004519 / 2990

How Storybook Hollow Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Storybook Hollow Montana avg Federal benchmark
Total violations 134 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 35 11.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 11.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 70 492 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,263 regulated public water systems in Montana.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Storybook Hollow water safe to drink? ▼
Storybook Hollow (PWS ID: MT0004519) has 134 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 70 people using Groundwater sources.
How many people does Storybook Hollow serve? ▼
Storybook Hollow serves 70 people in Billings, Montana. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does Storybook Hollow have? ▼
Storybook Hollow has 134 total violations: 35 health-based violations (MCL exceedances or treatment failures), 99 monitoring/reporting violations, and 5 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Storybook Hollow water? ▼
No PFAS testing data is available for Storybook Hollow under the EPA's UCMR5 monitoring program.
What water source does Storybook Hollow use? ▼
Storybook Hollow uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.