Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers · Iowa

3730 Martin Luther King Jr Dr

Name: 3730 Martin Luther King Jr Dr Workplace Safety Data
Creator: PlainSafetyScore
License: https://creativecommons.org/publicdomain/zero/1.0/

Waterloo, IA · ~135 workers · 2 years of OSHA Injury Tracking Application data.

Compiled by PlainSafetyScore · August 25, 2026

D
Poor Safety Record: 2.7
Avg TCR: 2.2
Industry avg: 0
Fatalities

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The verdict

3730 Martin Luther King Jr Dr runs at 124% of its industry's injury rate - more dangerous than the typical Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers workplace, earning a grade D.

3730 Martin Luther King Jr Dr: 2.7 TCR = 124% of Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers BLS 2.2 · 2y Form 300A (see methodology below)

3730 Martin Luther King Jr Dr safety composite

3730 Martin Luther King Jr Dr scores strongest on total case rate (tcr) (safer than 59% of same-industry peers) and weakest on dart rate (safer than 20%), blended into one 0-100 breakdown against same-industry peers. A missing measure drops out and redistributes its weight rather than deflating the score. This is a per-dimension breakdown, distinct from the single letter grade above it (which weights TCR alone against the BLS industry benchmark).

43/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR): C 2.73 per 100 workers

Safer than 59% of industry peers
DART rate: F 4.68 per 100 workers

Safer than 20% of industry peers
Fatalities: D 0

Safer than 50% of industry peers

Benchmarked live against every credibly-rated employer in the same NAICS industry code in the current OSHA extract (a segment must have at least 8 rated peers to benchmark). Not a legal or compliance determination; PlainSafetyScore's own weighting (TCR 40%, DART 35%, fatalities 25%).

Rising injury rate

3730 Martin Luther King Jr Dr: 0.0 → 5.5 TCR

Peak year 2021 @ 5.5 TCR · DART/TCR 1.71× in 2021

3730 Martin Luther King Jr Dr's TCR rose 5.5 from 0.0 in 2020 to 5.5 in 2021. In 2021, DART was 1.71× this establishment's average TCR (severity share of cases).

OSHA ITA Form 300A scorecard

Establishment book 423720 · Waterloo, IA ABOVE-IND · MID

Grade D · TCR 2.7 · 124% of ind

DART 4.7 DART
RANK #5/13
PHOTO Centerville Winsupply
BOOK 2y book
INJ 7 inj
SIZE ~135 FTE

Nearest TCR peer: Centerville Winsupply (0.0 TCR gap)

Read with this employer → · Industry book → · Iowa employers → · Look up another →

This site

2.7
Centerville Wi

2.7
Hajoca 079

2.7
Plimpton and H

2.7
Hajoca 743

2.7

What this shows 3730 Martin Luther King Jr Dr averages 2.7 TCR (124% of the Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers BLS benchmark).

3730 Martin Luther King Jr Dr TCR series: 2020=0 · 2021=5.5 · BLS 2.2

Where 3730 Martin Luther King Jr Dr falls in its industry

853 Plumbing and Heating Equipment establishments

Safer than 59% of graded establishments in this industry, whose median TCR is 3.3.

Grade D

More dangerous than peersSafer than peers

Narrower to Iowa alone (the establishments it most directly competes with for workers and contracts): ranked #5 safest of 13 Plumbing and Heating Equipment employers in Iowa.

3730 Martin Luther King Jr Dr (135 employees, TCR 2.7) among 29 same-industry peers, split at the industry median of 38 employees and a TCR of 3.3

3730 Martin Luther King Jr Dr has more employees than the Plumbing and Heating Equipment and Suppl median and a lower injury rate than the industry's median TCR of 3.3. Workforce size and injury rate do not always move together within the same industry -- some of its smaller peers run higher rates than its larger ones, and vice versa.

Year-by-Year Safety Data

Year	TCR	DART	Injuries	Illnesses	Fatalities
2021	5.5	4.7	7	0	0
2020	0.0	0.0	0	0	0

OSHA ITA peer cross-reference

Establishment peer ledger

423720 · IA · Waterloo

853 Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers employers nationwide with a credible TCR · 7,192 rated employers in Iowa with headcount on file · 172 employers in Waterloo, IA · 4 cross-state NAT-TCR peers · 4 cross-state NAT-SIZE peers. Closest matches by relationship code are listed below.

Rel	Establishment	Place	Metric
NAICS-TCR	Centerville Winsupply	DAYTON, OH	2.7 TCR
NAICS-TCR	Hajoca 079	SALT LAKE CITY, UT	2.7 TCR
NAICS-TCR	Plimpton and Hills Branch 4	FAIRFIELD, CT	2.7 TCR
NAICS-TCR	Hajoca 743	FORT WORTH, TX	2.7 TCR
STATE-SIZE	Luana	LUANA	135 FTE
STATE-SIZE	Hahn Ready Mix Plant #32	DAVENPORT	135 FTE
STATE-SIZE	GMT Corporation	WAVERLY	135 FTE
STATE-SIZE	O'Neal Manufacturing Services dba Iowa Laser Technology	CEDAR FALLS	135 FTE
CITY-NEAR	Black Hawk County Extension	Waterloo	4,790 FTE
CITY-NEAR	Waterloo Pork Plant	Waterloo	2,801 FTE
CITY-NEAR	UnityPoint	Waterloo	2,295 FTE
CITY-NEAR	JD Waterloo Tractor and Cab Assembly Operations	Waterloo	1,605 FTE
NAT-TCR	Rossin Steel, Inc.	San Diego, CA	2.7 TCR
NAT-TCR	H&M Metals,LLC	Amherst, NH	2.7 TCR
NAT-TCR	Parkrose Hardware	Vancouver, WA	2.7 TCR
NAT-TCR	4818-ILSF	Springfield, IL	2.7 TCR
NAT-SIZE	Ohio CAT - Columbus HE	Columbus, OH	135 FTE
NAT-SIZE	Cowin Equipment Company, Inc	Birmingham, AL	135 FTE
NAT-SIZE	Regency Plastics-Ubly Inc-Tx	El Paso, TX	135 FTE
NAT-SIZE	Flagship Resort Development Corporation	Atlantic City, NJ	135 FTE

Rel codes: NAICS-TCR · STATE-SIZE · CITY-NEAR · NAT-TCR/NAT-SIZE cross-state. Read with this employer →

Data Source: OSHA Injury Tracking Application (ITA), mandatory establishment-level injury/illness reports. Grades compare employer Total Case Rate (TCR) to BLS IIF industry benchmarks. Data covers years reported by this establishment: 2021, 2020. This is publicly available government data - not a legal determination of workplace conditions.

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

Data sourced from official public datasets. See our methodology for details.