Lead exposure in indoor firing ranges

Area of Science:

• Environmental Health
• Occupational Health
• Toxicology

Background:

• Lead exposure is a significant public health concern, particularly in environments with potential for high concentrations.
• Firing ranges present unique occupational and recreational exposure risks due to projectile propulsion methods.

Purpose of the Study:

• To quantify and compare air lead levels across different types of shooting ranges.
• To assess the impact of different shooting activities on blood lead levels in participants.
• To identify associations between shooting practices and lead exposure.

Main Methods:

• Air sampling to measure lead concentrations in firing ranges using powder charges, air guns, and archery.
• Blood lead level monitoring of marksmen and archers before and after the indoor shooting season.
• Statistical analysis to compare lead levels and identify correlations.

Main Results:

• Air lead levels were highest in powder charge ranges (660 µg/m³), intermediate in air gun ranges (4.6 µg/m³), and lowest in archery ranges (0.11 µg/m³).
• Marksmen using powder charges showed a significant increase in blood lead levels (106 to 138 µg/l), while air gun users had no significant change.
• Archers had lower baseline blood lead levels and a slight decrease during the season, with a significant association found between pistol shooting time and blood lead levels.

Conclusions:

• Powder charge firearms significantly increase lead exposure risk for marksmen compared to air guns and archery.
• Occupational health monitoring and protective measures are crucial for individuals participating in shooting sports, especially those using traditional firearms.
• Further research into effective lead mitigation strategies in firing range environments is warranted.