Site Operator: Missouri Department of Natural Resources' Environmental Services Program.

Pollutants Monitored: Sulfur Dioxide (SO2), Lead (Pb)

Site installed in June 2011. Previous data for area can be found on the Herculaneum, Main Street Site.

 

Lead (Pb)

Updated: Data is updated monthly.  Max three-month and 24-hour averages are updated quarterly on a 90-day delay.

National Ambient Air Quality Standard:

Primary: 0.15 µg/m3
Secondary: Same as the primary standard

On Nov. 12, 2008, EPA substantially strengthened the National Ambient Air Quality Standards for lead (see 73 FR 66964).  EPA lowered the level of the primary (health-based) standard from 1.5 micrograms per cubic meter (µg/m3) to 0.15 µg/m3, measured as total suspended particles.  EPA also revised the secondary (welfare-based) standard to be identical to the primary standard. 

The standard is based on the highest rolling three-month average over a period of three years and two months. The standard is met at a monitoring site when the three-month average is less than or equal to 0.15 μg/m3. For specific rules and technical information, consult 40 CFR Pt. 50, Appendix R.

The units for all averages in this table are micrograms per cubic meter. Data in this table, is calculated at local conditions using daily average temperature and barometric pressure. Lead is sampled on a set schedule.  Results in this table are a combination of samples for this site taken on an every third day run schedule.

Disclaimer: The following data is calculated using the lead National Ambient Air Quality Standards regulations. data shown below has been subject to data review and validation procedures by the department. The units for all averages in this table are micrograms per cubic meter. Data in this table, is calculated at local conditions using daily average temperature and barometric pressure. Lead is sampled on a set schedule.  Results in this table are a combination of samples for this site taken on an every day run schedule for the primary, every other day for the collocated sampler.

Lead (Pb)

The units for all averages in this chart are micrograms per cubic meter.
Herculaneum, Mott Street Primary
Year Month Monthly
Average
3-Month
Rolling Average
Month Monthly
Average
3-Month
Rolling Average
2014 January 0.108787 0.32 July 0.11777 0.11
February 0.1161 0.21 August 0.09459 0.11
March 0.164968 0.13 September 0.10454 0.11
April 0.18528 0.16 October 0.08801 0.1
May 0.08588 0.15 November    
June 0.12596 0.13 December    
             
2013 January 0.403743 0.57 July 0.38706774 0.35
February 0.560178 0.58 August 0.21030645 0.34
March 0.617529 0.53 September 0.370213 0.32
April 0.53746 0.57 October 0.357067 0.31
May 0.264658 0.47 November 0.443413 0.39
June 0.410821 0.4 December 0.40864 0.4
 
2012 January 0.2016103 0.27 July 0.41182 0.41
February 0.4660655 0.34 August 0.70437 0.5
March 0.8576178 0.51 September 0.3733 0.5
April 0.260833 0.53 October 0.533677 0.54
May 0.42792 0.52 November 0.473906 0.46
June 0.38284 0.36 December 0.7691 0.59
 
2011 June 0.7046266 NA October 0.4227 0.37
July 0.5026551 NA November 0.272603 0.29
August 0.50648 0.57 December 0.345677 0.35
September 0.18762 0.4  

 

Lead (Pb)

The units for all averages in this chart are micrograms per cubic meter.
Herculaneum, Mott Street Collocated
Year Month Monthly
Average
3-Month
Rolling Average
Month Monthly
Average
3-Month
Rolling Average
2014 January 0.09405 0.33 July 0.07807 0.12
February 0.133464 0.23 August 0.11313 0.11
March 0.198207 0.14 September 0.11679 0.1
April 0.211814 0.18 October 0.08314 0.1
May 0.13165 0.18 November    
June 0.13707 0.16 December    
             
2013 January 0.401592 0.57 July 0.3112625 0.33
February 0.856292 0.65 August 0.2392714 0.32
March 0.430262 0.56 September 0.327426 0.29
April 0.48053 0.59 October 0.421225 0.33
May 0.268428 0.39 November 0.427266 0.39
June 0.413886 0.39 December 0.45584 0.43
 
2012 January 0.283057 0.28 July 0.44842 0.46
February 0.39959 0.33 August 0.85402 0.58
March 0.88715 0.52 September 0.28922 0.53
April 0.25406 0.51 October 0.507085 0.55
May 0.50872 0.55 November 0.59807 0.46
June 0.43330 0.4 December 0.678971 0.59
 
2011 June 0.571475 NA October 0.37866 0.34
July 0.572807 NA November 0.270153 0.27
August 0.460893 0.54 December 0.014533 0.32
September 0.167664 0.4