Other States:
OREGON
Population: 3,421,399

Information on the state of Oregon is available for the following topics. To review this information, click on the links below.

Contacts| Regulations, Statutes & State Codes | Quick Facts | Septic Stats

Onsite Demonstration Programs | Onsite Management Communities

 

 

Contacts:
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Ed Woods, Manager
Land Application and Licensing, or
Chuck Harman
Oregon Department of Environmental Quality
Water Quality Division
811 S.W. 6th Avenue
Portland, Oregon 97204
(503) 229-5415 or (503) 229-5013 (respectively)
(503) 229-6037 (fax)

woods.ed@deq.state.or.us

harman.charles@deq.state.or.us

http://waterquality.deq.state.or.us/wq/Onsite/onsite.htm

 

Regulations, Statutes & State Codes:
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Oregon State Regulations

Oregon Constitutions, Statutes and Codes

Oregon Administrative Rules for On-Site Sewage Disposal
Chapter 340, Divisions 71
December 14, 2001

Oregon Administrative Rules for On-Site Sewage Disposal
Chapter 340, Division 73
August 24, 2000

The state of Oregon's onsite regulations were last updated in December 14, 2001; minor revisions are currently underway but are not yet available for review. Adoption of changes is expected by June 2002.

Technologies approved for onsite wastewater treatment and disposal include standard systems (septic tank and drainfield), recirculating gravel filters, sand filters, aerobic systems, capping fill, and technologies approved by NSF. Systems not specifically listed in the onsite rules (installation permits) can be permitted through the State Water Pollution Control Facilities permit process (operating permits).

In Oregon, sewage treatment systems that discharge to surface waters are permitted using NPDES permits through the Oregon Department of Environmental Quality and are approved on a case-by-case basis.

Oregon Code allows drainfield area/size reductions. The standard is the rock-filled trench. Reductions can be granted if a demonstration of equivalent performance to the standard trench is made. Currently, EZ Flow and Infiltrator products have approvals in Oregon for drainfield reductions, but both are allowed at the same length as the standard trench.

There are no funding programs/mechanisms available to assist homeowners replacing failing systems or installing new systems, and there are no plans to develop such a mechanism.

Onsite wastewater demonstration, research, and/or testing projects exist in Oregon. The La Pine National Onsite Demonstration project is ongoing. Infiltrator Systems has conducted a performance survey of their product in Oregon, and the state is studying the performance of several innovative systems funded by a 319 grant. Woods (above) may be contacted for further information.

In Oregon, the state has sole authority to adopt or require maintenance/management programs. System management/maintenance programs/contracts or management districts for onsite systems are not required but are allowed. One goal of the La Pine project is to develop a maintenance program for the new technology systems to be installed. The intent is to use the project as a model for other parts of the state.

The number of permits issued per year is tracked for new construction, and system repair and replacement are tracked in the same category. Although there is no statewide tracking system, records are maintained at both the local and state levels.

In Oregon, a failing system means one for which there is surfacing or groundwater contamination. The most common reason for system failure in the state is age. Most failing systems were installed before Oregon adopted statewide regulations in 1975. Another common reason for failure is excessive water use.

Oregon does not have a licensing/certification program for onsite wastewater professionals; either state or county sanitarians can perform site evaluations or inspections.

Information regarding municipal wastewater regulations may be obtained from:

Mike Kortenhof, Manager
Department of Environmental Quality
(503) 299-6066

 

Quick Facts:
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Total number of onsite systems: 500,000 estimated; 1990 U.S. census reports 350,000 systems.

Number of new systems installed each year: 6000.

Failure definition: Any system that discharges untreated or incompletely treated sewage or
septic tank effluent directly or indirectly onto the ground surface or into public waters.

Number or proportion of systems presently failing: NA

Number or proportion repaired annually: 2700 repairs, including some replacements.

Number or proportion replaced annually: See above.

Number or proportion of repairs or replacements that require alternative technology (e.g.,
sand filters, pressure dosing):
The repair or replacement of systems requires the system to meet
new construction standards as closely as reasonably possible. Alternative treatment technologies
are required at sites not meeting criteria for the standard drainfield system. Numerical data on the
technologies involved are not reported by field officers, but virtually all replacements are sand
filter systems.

Number or proportion of repairs or replacements that require advanced technology (e.g.,
disinfection, nutrient removal):
Disinfection is not required of any soil absorption system.
Nutrient reductions are obtained with the use of sand filter treatment units. In areas with rapidly
drained soils and/or areas where groundwater quality may be impacted, sand filters, pressurized
distribution, or other more advanced systems may be required.

Cost of a conventional septic system installation: $3500-$4000; range $2000-$14,000.

 

Septic Stats:
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TOTAL PERSONS TOTAL HOUSING UNITS PUBLIC SYSTEM DRILLED WELL DUG WELL OTHER PUBLIC SEWER SEPTIC TANK OTHER MEANS
OREGON 2,842,321 1,193,567 963,096 189,423 15,047 26,001 835,545 349,122 8,900
COUNTIES
BAKER 15,317 7,525 5,015 1,718 217 575 4,841 2,397 287
BENTON 70,811 27,024 20,620 5,686 236 482 19,193 7,659 172
CLACKAMAS 278,850 109,003 85,480 21,288 1,094 1,141 70,311 38,059 633
CLATSOP 33,301 17,367 16,246 364 287 470 11,665 5,567 135
COLUMBIA 37,557 14,576 9,186 4,046 445 899 6,555 7,900 121
COOS 60,273 26,668 18,794 3,365 1,859 2,650 17,274 8,905 489
CROOK 14,111 6,066 2,653 3,025 132 256 2,288 3,650 128
CURRY 19,327 9,885 6,938 1,341 599 1,007 4,979 4,692 214
DESCHUTES 74,958 35,928 25,799 7,999 587 1,543 16,338 19,196 394
DOUGLAS 94,649 38,298 27,883 7,150 948 2,317 23,979 14,080 239
GILLIAM 1,717 932 583 265 15 69 550 328 54
GRANT 7,853 3,774 2,301 734 131 608 2,033 1,487 254
HARNEY 7,060 3,305 2,106 1,056 19 124 2,070 1,185 50
HOOD RIVER 16,903 7,569 7,134 224 20 191 3,528 3,945 96
JACKSON 146,389 60,376 41,262 17,519 760 835 43,795 16,226 355
JEFFERSON 13,676 6,311 5,158 694 46 413 2,598 3,667 46
JOSEPHINE 62,649 26,912 8,658 16,257 1,188 809 11,242 15,138 532
KLAMATH 57,702 25,954 17,794 7,678 264 218 16,774 8,904 276
LAKE 7,186 3,434 1,832 1,383 119 100 1,794 1,563 77
LANE 282,912 116,676 93,047 20,417 980 2,232 77,640 38,118 918
LINCOLN 38,889 22,389 18,861 1,248 619 1,661 13,475 8,688 226
LINN 91,227 36,482 21,584 13,660 675 563 21,246 14,976 260
MALHEUR 26,038 10,649 5,689 4,626 162 172 5,691 4,731 227
MARION 228,483 86,869 69,010 16,283 877 699 68,442 18,097 330
MORROW 7,625 3,412 1,843 1,304 57 208 1,614 1,716 82
MULTNOMAH 583,887 255,751 252,544 2,576 227 404 207,154 47,882 715
POLK 49,541 18,978 16,399 2,030 255 294 13,504 5,433 41
SHERMAN 1,918 900 581 268 19 32 457 434 9
TILLAMOOK 21,570 13,324 11,187 692 159 1,286 7,971 5,282 71
UMATILLA 59,249 24,333 17,074 6,517 385 357 16,114 7,991 228
UNION 23,598 9,974 7,184 2,058 154 578 6,956 2,758 260
WALLOWA 6,911 3,755 2,184 754 164 653 1,853 1,695 207
WASCO 21,683 10,476 8,205 1,787 103 381 6,885 3,251 340
WASHINGTON 311,554 124,716 114,512 8,579 803 822 108,838 15,684 194
WHEELER 1,396 782 381 184 17 200 219 515 48
YAMHILL 65,551 23,194 17,369 4,648 425 752 15,679 7,323 192

 

Onsite Demonstration Programs:
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La Pine region of Deschutes County will become a National Decentralized Wastewater
Demonstration Project; it will concentrate on I/A technologies, nitrate reducing systems,
onsite management, and groundwater/contaminant monitoring.

Onsite Management Communities:
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There is no information available on Onsite Management Communities in Oregon.