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FOREST SERVICE MANUAL
INTERMOUNTAIN REGION (REGION 4)
OGDEN, UT
FSM 7400 – PUBLIC HEALTH AND POLLUTION CONTROL FACILITIES
CHAPTER 7420 – DRINKING WATER
Supplement No.: 7400-2012-1
Effective Date: December 17, 2012
Duration: This supplement is effective until superseded or removed.
Approved: HARV FORSGREN
Regional Forester
Date Approved: 12/14/2012
Posting Instructions: Supplements are numbered consecutively by title and calendar year.
Post by document; remove the entire document and replace it with this supplement. Retain this
transmittal as the first page(s) of this document. The last supplement to this title was 7400-20042 to FSM 7410.
New Document
7420
3 Pages
Superseded Document(s) by
Issuance Number and
Effective Date
7420 (Supplement FSM 7400-93-2,
10/12/93)
8 Pages
Digest:
7421.21 - Requires monthly bacteriological testing for all seasonal drinking water systems
during season of operation.
7421.25 – Outlines chemical monitoring for non-public drinking water systems.
R4 SUPPLEMENT 7400-2012-1
EFFECTIVE DATE: 12/17/2012
DURATION: This supplement is effective until superseded or removed.
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FSM 7400 – PUBLIC HEALTH AND POLLUTION CONTROL FACILITIES
CHAPTER 7420 – DRINKING WATER
7421.21 – Microbiological (Coliform) Monitoring
For public and nonpublic seasonal drinking water systems, perform microbiological testing for
total coliform bacteria at a minimum frequency of one sample per month for every full or partial
calendar month of operation. For microbiological monitoring only, consider each handpump a
separate water system.
7421.25 – Primary Contaminants, Secondary Contaminants, Regulated and
Unregulated Organic and Inorganic Chemicals, and Other Contaminants
Testing Requirements for Non-Public Systems (All sources)
1. Non-Public Non-Transient Water Systems: NPNT (All sources).
Conduct initial monitoring of newly developed and reconstructed NPNT sources for the
selected contaminants listed below. Ensure that existing NPNT systems have baseline
samples for selected contaminants listed below. Consideration of historical or current
site and surrounding recharge area usage may indicate additional sampling requirements
(for example, more contaminants, number of samples, sampling frequency, and so forth).
Primary Contaminants
Arsenic
Antimony
Barium
Beryllium
Cadmium
Chromium
Cyanide
Fluoride
Lead
Mercury
Nitrate
Nitrite
Selenium
Sodium
Thallium
Secondary Contaminants
Alkalinity
Aluminum
Calcium
Chloride
Color
Copper
Corrosivity
Foaming Agent (Surfactants)
Hardness
Iron
Magnesium
Manganese
Odor
pH
Silver
Specific Conductance
Sulfate
Total Dissolved Solids
Zinc
R4 SUPPLEMENT 7400-2012-1
EFFECTIVE DATE: 12/17/2012
DURATION: This supplement is effective until superseded or removed.
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FSM 7400 – PUBLIC HEALTH AND POLLUTION CONTROL FACILITIES
CHAPTER 7420 – DRINKING WATER
Specifically request each of the analyses listed above since laboratories will not have
equivalent groupings under primary and secondary contaminants.
2. Non-Public Transient Water Systems: NPT (all sources).
Conduct initial monitoring of newly developed and reconstructed NPT sources for nitrate
and nitrite. Ensure that existing NPT systems have baseline samples for nitrate and
nitrite. Consideration of historical or current site and surrounding recharge area usage
may indicate additional sampling requirements.
3. After the baseline water quality of non-public systems has been established,
reassessment of system and site vulnerability shall occur during each sanitary survey;
adjustments to system monitoring requirements and sampling plan may be necessary.