Construction (29 CFR 1926)

Respirable Crystalline Silica (Construction)

Verified vs OSHA sources · 2026-10-05

29 CFR 1926.1153

29 CFR 1926.1153 protects construction workers from respirable crystalline silica, capping exposure at a 50 µg/m³ 8-hour TWA with a 25 µg/m³ action level. Employers comply either by following Table 1's specified controls for a task or by assessing exposure and controlling to the PEL, plus a written exposure control plan and medical surveillance.

632 citations in construction (NAICS 23, federal, FY2025)

29 CFR 1926.1153 at a glance

What it requires: Protect construction workers from respirable crystalline silica dust
PEL: 50 µg/m³ as an 8-hour TWA (29 CFR 1926.1153(d)(1))
Action level: 25 µg/m³ (8-hr TWA): triggers exposure monitoring; medical surveillance is triggered by required respirator use 30+ days/yr (h)
The Table 1 shortcut: Fully implement Table 1's control method for a task and you're deemed compliant: no air monitoring
Max penalty (2026): $16,550 per serious violation; $165,514 per willful
The #1 confusion: Table 1 compliance and the exposure-assessment path are two alternative routes: pick one per task

What 29 CFR 1926.1153 requires (plain English)

29 CFR 1926.1153 protects construction workers from respirable crystalline silica: the fine dust released when cutting, grinding, drilling, or crushing concrete, brick, stone, and mortar. Inhaled silica causes silicosis (an incurable, progressive lung disease), lung cancer, COPD, and kidney disease, and there is no cure once the damage is done. The construction silica standard sets a permissible exposure limit of 50 µg/m³ as an 8-hour time-weighted average and an action level of 25 µg/m³.

The standard offers two compliance paths, and this is its defining feature. Under the first path, an employer follows Table 1: a list of 18 common construction tasks (using a stationary masonry saw, a handheld grinder, a jackhammer, and so on) each paired with a specified dust-control method (typically water or a vacuum dust-collection system) and, where needed, respiratory protection. If the employer fully and properly implements the Table 1 control for a task, the task is deemed compliant and no exposure monitoring is required. Under the second path (the "alternative exposure control methods"), the employer instead assesses each worker's actual exposure and keeps it at or below the PEL through its own controls, with air monitoring to prove it.

Either way, the employer must have a written exposure control plan, designate a competent person to implement it, and restrict housekeeping practices that stir dust (no dry sweeping or compressed-air cleaning where it exposes workers, if a feasible alternative exists). Medical surveillance must be offered to any worker who is required to wear a respirator under the standard for 30 or more days per year. Because silica exposure is so common in construction and the disease is irreversible, OSHA enforces this standard through a national emphasis program.

The regulatory text

“The employer shall ensure that no employee is exposed to an airborne concentration of respirable crystalline silica in excess of 50 µg/m3, calculated as an 8-hour TWA.”

29 CFR 1926.1153(d)(1)

Key facts about 29 CFR 1926.1153

PEL: 50 µg/m³ as an 8-hour TWA (29 CFR 1926.1153(d)(1)).
Action level: 25 µg/m³ (8-hr TWA), triggers exposure monitoring; the medical-surveillance trigger is separate (required respirator use 30+ days/year, 1926.1153(h)).
Two compliance paths: Table 1 (specified controls, deemed compliant, no monitoring) OR alternative exposure control with air monitoring.
Table 1 lists 18 common construction tasks, each with a required dust-control method (usually water or vacuum dust collection).
A written exposure control plan and a designated competent person are required regardless of path.
Medical surveillance is offered to workers required to wear a respirator for 30+ days per year (1926.1153(h)).
Silica causes silicosis (incurable), lung cancer, COPD, and kidney disease; it is an IARC Group 1 human carcinogen.

Scope: who 29 CFR 1926.1153 applies to

Regulatory framework: Construction (29 CFR 1926)
Citation reference: 29 CFR 1926.1153
Enforcement status: In force and enforced
Jurisdiction: Federal OSHA (29 State-Plan jurisdictions may be stricter)

State-Plan states (e.g. California, Washington, Michigan) operate OSHA-approved programs that must be at least as effective as federal OSHA and frequently impose higher penalties or additional requirements. Confirm the rule as adopted in your state.

Key requirements of 29 CFR 1926.1153

#	Employer obligation
1	Limit exposure to 50 µg/m³ PEL
2	Follow Table 1 controls or conduct exposure assessments
3	Provide respiratory protection when controls insufficient
4	Medical surveillance for workers required to use a respirator 30+ days/year (1926.1153(h))
5	Designate competent person for silica
6	Maintain exposure records

Summarized from the text of 29 CFR 1926.1153. Always read the full regulation for the binding language.

Common Silica (Construction) violations

Deficiencies OSHA cites under 29 CFR 1926.1153 include the ones below, in no particular order. Distinct deficiencies can be cited as separate items, and each serious item carries up to $16,550 (2026). Broader per-instance stacking exists but is a discretionary, case-by-case OSHA enforcement policy, not an automatic multiplier.

No written exposure control plan, or no designated competent person (1926.1153(g)).
Table 1 control not fully/properly implemented (e.g., saw run without water) while claiming the Table 1 exemption (1926.1153(c)).
No exposure assessment/monitoring when relying on the alternative (non-Table-1) path (1926.1153(d)).
Prohibited housekeeping: dry sweeping or compressed-air cleaning where a feasible alternative exists (1926.1153(f)).
No medical surveillance offered to workers required to wear a respirator 30+ days/year (1926.1153(h)).

Table 1 vs. the exposure-assessment path: two routes, not one

The single biggest point of confusion is how the standard is structured. It gives employers TWO alternative ways to comply with each task. Path one: follow Table 1, implement the exact engineering control, work practice, and respiratory protection the table specifies for that task, fully and properly. If you do, you are deemed compliant and you do NOT have to conduct air monitoring. Path two: the "alternative exposure control methods": you do NOT follow Table 1, and instead you measure each worker's actual exposure and keep it at or below the 50 µg/m³ PEL using your own controls, backed by air monitoring. You choose per task. The mistake is treating Table 1 as optional guidance while ignoring the PEL, or doing air monitoring for a task you're fully controlling under Table 1: the two paths are alternatives, not layers.

What OSHA inspectors look for

A compliance officer checks whether the employer is using Table 1 or the alternative exposure-control method for each dusty task, then verifies the matching engineering controls (water or vacuum dust collection), the written exposure control plan, the designated competent person, and medical surveillance for workers required to wear a respirator 30 or more days a year (1926.1153(h)). Dry cutting without water or vacuum is the classic finding.

Example: how a violation is cited

A crew dry-cuts concrete block with a handheld saw and no water or dust collection, well above the 50 µg/m³ PEL. OSHA cites 1926.1153(c) for not following Table 1's specified control and (f) for the missing written exposure control plan: a common pairing on masonry and demolition sites.

Illustrative example, not a specific OSHA case.

Silica (Construction) compliance checklist

Use this to evaluate your compliance with 29 CFR 1926.1153. Each item is a key requirement OSHA may verify during an inspection.

For each dust-generating task, choose a path: Table 1 control, or exposure assessment against the PEL.
If using Table 1, implement the specified water/vacuum control and respirator exactly and fully.
If not using Table 1, assess exposures and keep them at or below the PEL with monitoring to prove it.
Write an exposure control plan and designate a competent person to implement and inspect it.
Restrict dry sweeping and compressed-air cleaning where feasible alternatives exist.
Offer medical surveillance to any worker required to wear a respirator 30+ days per year.

2026 penalties for 29 CFR 1926.1153

Maximums set by 29 CFR 1903.15(d). 2026 amounts unchanged from 2025 (no CPI adjustment; OMB M-26-11). Not an increase. The 2025 OSHA penalty levels remain in effect for 2026; OSHA made no inflation adjustment for 2026. 29 CFR 1903.15 identifies January 15, 2025 as the effective reference for these amounts, while OSHA's public penalties page currently references penalties assessed after Jan. 15, 2026.

Violation type	Minimum	Maximum	When it applies
Serious	$1,085	$16,550	Substantial probability of death or serious physical harm.
Other-Than-Serious	$0	$16,550	Relates to safety/health but unlikely to cause death or serious harm.
Willful	$11,823	$165,514	Intentional, knowing, or voluntary disregard of the requirement.
Repeated	$4,256	$165,514	A substantially similar violation cited within the last 5 years.
Failure to Abate	None	$16,550/day	up to $16,550 per day; total capped at 30x the daily amount (FOM Ch.6)

Silica is an enforcement priority under OSHA's construction focus, and inspectors carry the Table 1 tasks in mind. Serious violations reach $16,550 and willful or repeat violations $165,514; a dusty task without controls plus a missing written plan is a frequent grouped citation.

Maximums and the willful minimum are set by 29 CFR 1903.15(d); the serious and repeated minimums are OSHA policy floors from its annual penalty adjustment memo. OSHA applies gravity-based and size, good-faith and history reductions (FOM CPL 02-00-164 Ch.6). Estimates only, not legal advice.

The business case for Silica (Construction) compliance

Respirable crystalline silica causes silicosis, lung cancer, COPD, and kidney disease, and the lung damage is incurable. OSHA estimates the silica rule prevents hundreds of deaths and thousands of silicosis cases a year, yet cutting, grinding, or drilling concrete and masonry can push exposures many times over the 50 µg/m³ PEL without controls.

Free compliance tools for 29 CFR 1926.1153

Silica Table 1 Control Selector Silica Exposure Calculator

Silica (Construction) penalties by state

Penalties and enforcement vary by state. State-Plan states may impose higher penalties and additional requirements beyond federal 29 CFR 1926.1153.

Alabama Arkansas Colorado Connecticut Delaware District of Columbia

View all 50 states + DC →

Frequently asked questions about 29 CFR 1926.1153

What is the OSHA silica PEL in construction?

Under 29 CFR 1926.1153(d)(1), no employee may be exposed to respirable crystalline silica above 50 µg/m³ as an 8-hour time-weighted average. The action level, which triggers exposure monitoring obligations, is 25 µg/m³ as an 8-hour TWA. Medical surveillance has its own separate trigger in construction: it is owed to each worker required to wear a respirator under the standard for 30 or more days a year (1926.1153(h)). Silica is released when cutting, grinding, drilling, or crushing concrete, masonry, and stone.

What is Table 1 in the silica standard?

Table 1 is a list of 18 common construction tasks (such as using a stationary masonry saw, a handheld grinder, or a jackhammer) each paired with a specified dust-control method (usually water or a vacuum dust-collection system) and, where needed, respiratory protection. If an employer fully and properly implements the Table 1 control for a task, the task is deemed compliant with the standard and the employer does not have to perform air monitoring for it. Table 1 is the simpler of the two compliance paths.

Do I have to do air monitoring for silica?

Not if you fully implement Table 1. The standard gives two paths: (1) follow Table 1's specified controls exactly, in which case no air monitoring is required for that task; or (2) use the alternative exposure control methods, in which case you must assess each worker's exposure with air monitoring and keep it at or below the 50 µg/m³ PEL. You choose per task. Many contractors use Table 1 for most tasks precisely to avoid the monitoring burden.

When is silica medical surveillance required?

Under 1926.1153(h), the employer must make medical surveillance available at no cost to any employee who will be required to wear a respirator under the standard for 30 or more days per year. The surveillance includes a baseline exam, chest X-ray, and pulmonary function test, repeated at least every three years, to detect early signs of silica-related disease.

Regulatory history of 29 CFR 1926.1153

OSHA issued the current respirable crystalline silica standards in March 2016 (81 FR 16286), replacing decades-old limits with the 50 µg/m³ PEL and creating the separate construction standard (1926.1153) with its innovative Table 1 specified-controls approach. Enforcement of the construction standard began in the fall of 2017, and silica is the subject of an OSHA National Emphasis Program.

Related glossary terms

Key terms that appear in 29 CFR 1926.1153, each with a full plain-English explainer.

Respirable Crystalline Silica Silicosis Table 1 (Silica Controls)Permissible Exposure Limit (PEL)Action Level Medical Surveillance

Related guides & articles

OSHA Silica Compliance for Construction 2026

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Primary sources

OSHA figures on this page are imported from HazComFast's verified regulatory module (verified 2026-10-05 against eCFR, OSHA.gov, and the Federal Register).

This page is an educational summary, not legal advice. OSHA standards and penalty amounts change; confirm requirements against the current regulation and your applicable State-Plan before acting.

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