New Mexico Register / Volume XXXVII, Issue 4 / February 24,
2026
TITLE 20 ENVIRONMENTAL
PROTECTION
CHAPTER 2 AIR
QUALITY (STATEWIDE)
PART 68 REGIONAL
HAZE REQUIREMENTS
20.2.68.1 ISSUING
AGENCY: Environmental Improvement Board.
[20.2.68.1 NMAC – N, 04/01/2026]
20.2.68.2 SCOPE: All geographic areas within the jurisdiction
of the Environmental Improvement Board.
[20.2.68.2 NMAC – N, 04/01/2026]
20.2.68.3 STATUTORY
AUTHORITY: Environmental Improvement Act, Sections
74-1-1 to 74-1-18 NMSA 1978, including specifically Paragraph (4) of Subsection
A of Section 74-1-8 NMSA 1978, and Air Quality Control Act, Sections 74-2-1 to
74-2-17 NMSA 1978, including specifically Paragraph (1) of Subsection D of
Section 74-2-5 NMSA 1978.
[20.2.68.3
NMAC – N, 04/01/2026]
20.2.68.4 DURATION: Permanent.
[20.2.68.4
NMAC – N, 04/01/2026]
20.2.68.5 EFFECTIVE
DATE: April 1, 2026, except where a later date is
cited at the end of a section.
[20.2.68.5 NMAC – N, 04/01/2026]
20.2.68.6 OBJECTIVE: The objective of this Part is to establish
enforceable emission limitations, compliance schedules, and other measures that
are necessary to make reasonable progress during the second regional haze
implementation period, and provisions to make these measures practicably
enforceable, including averaging times, monitoring requirements, and
recordkeeping and reporting requirements.
[20.2.68.6 NMAC – N, 04/01/2026]
20.2.68.7 DEFINITIONS: In addition to the terms defined in 20.2.2
NMAC – Definitions, as used in this Part, the following definitions apply:
A. “Agency interest number” or
“AI #” means the unique identification number assigned to every facility
that is regulated by the department.
B. “Calendar year” means a year
beginning January 1 and ending December 31.
C. “CFR” means the Code of Federal
Regulations.
D. “Continuous emission monitoring
system” or “CEMS” means all of the equipment required to sample,
condition (if applicable), analyze, and provide a record of emissions on a
continuous basis.
E. “Environmental protection agency” or
“EPA” means the United States environmental protection agency.
F. “g/bhp-hr” means grams per brake
horsepower-hour.
G. “lb/hr” means pounds per hour.
H. “Operator” means the person or
persons responsible for the overall operation of a stationary source.
I. “Owner” means the person or persons
who own a stationary source or part of a stationary source.
J. “ppmvd” means parts per million
by volume, dry.
K. “Reasonable progress unit” or
“RP unit” means an emissions unit selected for an analysis of emission
control measures during the second regional haze implementation period for
which the department has determined an emission limitation or other measures
are necessary to make reasonable progress.
L. “Rolling average” means the weighted
average of all data, meeting this Part’s quality assurance and quality control
requirements, collected during the applicable averaging period. For reasonable progress units equipped with
CEMS, a 30-operating-day rolling average is calculated by adding the hourly
mass emissions over the previous 30 operating days and dividing that sum by the
total operating hours during the same period.
M. “Rolling sum” means the sum of all
data, meeting this Part’s quality assurance and quality control requirements,
collected during the applicable summation period. For reasonable progress units not equipped
with CEMS and subject to a multi-unit emission limitation, a 12-month rolling
sum is calculated by multiplying each individual unit’s hourly mass emission
rate by its total operating hours over the previous 12 months and summing the
results for all units subject to the multi-unit limit.
[20.2.68.7 NMAC – N, 04/01/2026]
20.2.68.8 SEVERABILITY: If any provision of this Part, or the
application of this provision to any person or circumstance is held invalid,
the remainder of this Part, or the application of this provision to any person
or circumstance other than those as to which it is held invalid, shall not be
affected thereby.
[20.2.68.8 NMAC – N, 04/01/2026]
20.2.68.9 CONSTRUCTION: This Part shall be liberally construed to
carry out its purpose.
[20.2.68.9 NMAC – N, 04/01/2026]
20.2.68.10 SAVINGS
CLAUSE: Repeal or supersession of prior versions of
this Part shall not affect administrative or judicial action initiated under
those prior versions.
[20.2.68.10 NMAC – N, 04/01/2026]
20.2.68.11 COMPLIANCE
WITH OTHER REGULATIONS: Compliance
with this Part does not relieve a person from the responsibility to comply with
other applicable federal, state, or local laws, rules or regulations, including
more stringent controls.
[20.2.68.11 NMAC – N, 04/01/2026]
20.2.68.12 DOCUMENTS: Documents incorporated and cited in this Part
may be viewed at the New Mexico environment department, air quality bureau.
[20.2.68.12 NMAC – N, 04/01/2026]
[As of February 2026, the air quality bureau
is located at 525 Camino de los Marquez, Suite 1, Santa Fe, New Mexico 87505]
20.2.68.13-20.2.68.100 [RESERVED]
20.2.68.101 APPLICABILITY:
This Part applies to reasonable progress units as defined in 20.2.68.7
NMAC.
[20.2.68.101 NMAC – N, 04/01/2026]
20.2.68.102 EMISSION LIMITATIONS AND COMPLIANCE DEADLINES:
A. The reasonable progress units
listed in Table 1 of Subsection A of 20.2.68.102 NMAC shall not emit or cause
to be emitted oxides of nitrogen (NOx) in excess of the emission
limitations shown. The emission
limitations must be met as expeditiously as practicable, but in no event later
than their respective compliance deadlines.
Table 1 – EMISSIONS LIMITATIONS AND
COMPLIANCE DEADLINES
|
Facility |
AI # |
RP Unit |
Emission Limitation |
Compliance Deadline |
|
Bitter Lake Compressor Station |
14 |
C-891 |
3 g/bhp-hr |
0 years |
|
C-893 |
3 g/bhp-hr |
0 years |
||
|
Blanco Compressor Station A |
1147 |
A11 |
0.5 g/bhp-hr |
3 years |
|
A13 |
0.5 g/bhp-hr |
3 years |
||
|
Blanco C&D Compressor Station |
3552 |
T-C01 |
13.04 lb/hr |
3 years |
|
T-C02 |
13.32 lb/hr |
3 years |
||
|
T-D01 |
24.22
lb/hr |
3 years |
||
|
Chaco Gas Plant |
1148 |
14 |
0.5 g/bhp-hr |
2 years |
|
Cunningham Station Power Plant |
604 |
1 |
12.07 lb/hr |
3 years |
|
2 |
30.05 lb/hr |
3 years |
||
|
Eunice Gas Processing Plant |
609 |
B-01 |
9 ppmvd @ 3% O2 |
2 years |
|
B-02 |
9 ppmvd @ 3% O2 |
2 years |
||
|
C-01 |
0.5 g/bhp-hr |
3 years |
||
|
C-02 |
0.5 g/bhp-hr |
3 years |
||
|
C-03 |
0.5 g/bhp-hr |
3 years |
||
|
C-04 |
0.5 g/bhp-hr |
3 years |
||
|
C-05 |
0.5 g/bhp-hr |
3 years |
||
|
C-06 |
0.5 g/bhp-hr |
3 years |
||
|
C-07 |
0.5 g/bhp-hr |
3 years |
||
|
Indian Basin Gas Plant |
197 |
ES 06/07 |
25
ppmvd @ 15% O2 |
2 years |
|
ES 08/09 |
25
ppmvd @ 15% O2 |
2 years |
||
|
ES 10/11 |
25 ppmvd @ 15% O2 |
2 years |
||
|
Kutz Canyon Processing Plant |
1158 |
1 |
3.34
lb/hr |
3 years |
|
2 |
3.54
lb/hr |
3 years |
||
|
4 |
2.82
lb/hr |
3 years |
||
|
5 |
2.38
lb/ hr |
3 years |
||
|
6 |
2.36
lb/hr |
3 years |
||
|
19 |
3.12
lb/hr |
3 years |
||
|
20 |
3.12
lb/hr |
3 years |
||
|
Linam Ranch Gas Plant |
589 |
29 |
15 ppmvd @ 15% O2 |
0 years |
|
30 |
25 ppmvd @ 15% O2 |
0 years |
||
|
31 |
25 ppmvd @ 15% O2 |
0 years |
||
|
32B |
25 ppmvd @ 15% O2 |
1 year |
||
|
Monument Gas Plant |
610 |
C-01 |
0.5 g/bhp-hr |
3 years |
|
C-02 |
0.5 g/bhp-hr |
3 years |
||
|
C-05 |
0.5 g/bhp-hr |
3 years |
||
|
C-06 |
0.5 g/bhp-hr |
3 years |
||
|
C-24 |
0.5 g/bhp-hr |
3 years |
||
|
Mountainair Compressor Station No. 7 |
1569 |
701 |
44.74 ton/yr |
3 years |
|
702 |
||||
|
703 |
||||
|
721 |
9 ppmvd @ 15% O2 |
3 years |
||
|
722 |
9 ppmvd @ 15% O2 |
3 years |
||
|
Pecos River Compressor Station |
194 |
A-02 |
7.28
lb/hr |
3 years |
|
A-03 |
8.1
lb/hr |
3 years |
||
|
Roswell Compressor Station No. 9 |
10 |
903 |
29 ton/yr |
3 years |
|
904 |
||||
|
San Juan Basin Gas Plant |
1177 |
1 |
3.96
lb/hr |
3 years |
|
2 |
4.24
lb/hr |
3 years |
||
|
3 |
3.88
lb/hr |
3 years |
||
|
4 |
2.78
lb/hr |
3 years |
||
|
5 |
2.74
lb/hr |
3 years |
||
|
6 |
3.04
lb/hr |
3 years |
||
|
7 |
2.88
lb/hr |
3 years |
||
|
South Carlsbad Compressor Station |
218 |
1 |
15
ppmvd @ 15% O2 |
2 years |
|
2 |
15
ppmvd @ 15% O2 |
2 years |
||
|
Washington Ranch Storage Facility |
220 |
1 |
3 g/bhp-hr |
0 years |
|
2 |
3 g/bhp-hr |
0 years |
B. The compliance deadlines in Table
1 of Subsection A of 20.2.68.102 NMAC are expressed in years after approval of
New Mexico’s state implementation plan revision for the second regional haze
implementation period by the environmental protection agency.
C. The emission limitation in Table
1 of Subsection A of 20.2.68.102 NMAC for reasonable progress units 701, 702,
and 703 at Mountainair Compressor Station No. 7 is a multi-unit limit
applicable to all three units combined.
Similarly, the emission limitation in Table 1 of Subsection A of
20.2.68.102 NMAC for reasonable progress units 903 and 904 at Roswell
Compressor Station No. 9 is a multi-unit limit applicable to both units
combined. In the event compliance with either of these multi-unit limits is
achieved by replacing the subject units, and the replacement ratio is not 1:1,
the limit will apply to all of the replacement units combined, regardless of
their number.
D. The owner or operator of a reasonable
progress unit that complies with the emission limitations in Table 1 of
Subsection A of 20.2.68.102 NMAC using an emission control technology that uses
ammonia or urea as a reagent shall ensure that the exhaust ammonia slip is
limited to 10 ppmvd or less, corrected to fifteen percent oxygen.
[20.2.68.102 NMAC – N, 04/01/2026]
20.2.68.103 OTHER MEASURES:
The reasonable progress units listed in Table 2 of 20.2.68.103 NMAC have
been retired and removed from their facilities’ respective construction permits
(or were located at a facility that has permanently ceased operations and
closed its construction permit) and shall not be reauthorized as a regulated
emission source in any future construction permit modification issued by the
department without a new analysis of the emission control measures necessary to
make reasonable progress and an EPA-approved regional haze state implementation
plan revision.
Table 2 – RETIRED UNITS PROHIBITED FROM
REAUTHORIZATION
|
Facility |
AI # |
RP Unit |
Date Removed
from Permit or Permit Closed |
|
Denton Gas Plant |
568 |
005 |
February 4, 2022 |
|
007 |
February 4, 2022 |
||
|
Eunice Gas Plant |
595 |
17A |
November 5, 2021 |
|
18B |
November 5, 2021 |
||
|
19A |
November 5, 2021 |
||
|
25A |
November 5, 2021 |
||
|
26A |
November 5, 2021 |
||
|
Amine-01 |
November 5, 2021 |
||
|
31 |
November 5, 2021 |
||
|
111 |
November 5, 2021 |
||
|
113 |
November 5, 2021 |
||
|
Eunice Gas Processing Plant |
609 |
C-08 |
August 20, 2024 |
|
C-09 |
May 31, 2024 |
||
|
C-10 |
May 31, 2024 |
||
|
C-11 |
May 31, 2024 |
||
|
C-12 |
May 31, 2024 |
||
|
C-13 |
May 31, 2024 |
||
|
Jal #3 Gas Plant |
569 |
4A |
November 7, 2022 |
|
5A |
November 7, 2022 |
||
|
Kutz Canyon Processing Plant |
1158 |
16 |
May 11, 2021 |
|
17 |
May 11, 2021 |
||
|
18 |
May 11, 2021 |
||
|
Prewitt Escalante Generating Station |
911 |
S111 |
June 16, 2021 |
|
San Juan Generating Station |
1421 |
S301/E301 |
December 27, 2022 |
|
S304/E304 |
December 27, 2022 |
||
|
Saunders Gas Plant |
612 |
C-01 |
May 31, 2024 |
|
C-02 |
May 31, 2024 |
||
|
C-03 |
May 31, 2024 |
||
|
C-04 |
May 31, 2024 |
||
|
C-05 |
May 31, 2024 |
||
|
C-06 |
May 31, 2024 |
||
|
C-07 |
May 31, 2024 |
||
|
C-08 |
May 31, 2024 |
||
|
C-09 |
May 31, 2024 |
||
|
G-01 |
May 31, 2024 |
||
|
G-02 |
May 31, 2024 |
||
|
G-03 |
May 31, 2024 |
||
|
A-01 |
May 31, 2024 |
||
|
F-01 |
May 31, 2024 |
||
|
F-03 |
May 31, 2024 |
||
|
I-01 |
May 31, 2024 |
[20.2.68.103 NMAC – N, 04/01/2026]
20.2.68.104 MONITORING REQUIREMENTS:
Compliance with the emission limitations in Table 1 of Subsection A of
20.2.68.102 NMAC shall be demonstrated as follows.
A. For reasonable progress units one and
two at Cunningham Station Power Plant, compliance shall be determined on a
30-operating-day rolling average basis within seven days of the end of each
30-operating-day period, and shall be demonstrated using data from a NOx
continuous emission monitoring system complying with the performance
requirements in 40 CFR 75.
B. For reasonable progress units 701,
702, and 703 at Mountainair Compressor Station No. 7 and reasonable progress
units 903 and 904 at Roswell Compressor Station No. 9, compliance shall be
determined on a 12-month rolling sum basis within seven days of the end of each
month, and shall be demonstrated by monitoring operating hours and conducting
annual emissions tests using a portable analyzer or EPA reference methods in
accordance with the requirements of Subsection D of 20.2.68.104 NMAC. The results of the most recent annual
emissions test shall be used to calculate the 12-month rolling sum used to
determine compliance.
C. For all other reasonable progress
units, compliance shall be demonstrated by conducting annual emissions tests
using a portable analyzer or EPA reference methods in accordance with the
requirements of Subsection D of 20.2.68.104 NMAC. The arithmetic mean of the results from three
separate test runs shall be used to determine compliance pursuant to Paragraph
(5) of Subsection D of 20.2.68.104 NMAC.
D. The following requirements apply to
annual emissions testing used to demonstrate compliance with the emission
limitations in Table 1 of Subsection A of 20.2.68.102 NMAC:
(1) For units with g/bhp-hr emission
limits, load shall be calculated using the following equation:
If the manufacturer’s rated brake-specific
fuel consumption is not available, an alternative load calculation methodology
based on available data may be used.
(2) Emissions testing shall be conducted
within ten percent of one hundred percent peak (or the highest achievable)
load. The load and the parameters used
to calculate it shall be recorded to document operating conditions at the time
of testing and shall be included with the test report.
(3) Emissions testing utilizing a portable
analyzer shall be conducted in accordance with the requirements of the current
version of ASTM D6522. If a portable
analyzer has met a previously approved department criterion, the analyzer may
be operated in accordance with that criterion until it is replaced.
(4) The default time period for a test run
shall be at least 20 minutes.
(5) An emissions test shall consist of
three separate runs, with the arithmetic mean of the results from the three
runs used to determine compliance with the applicable emission limitation.
(6) During emissions tests, pollutant and
diluent concentration shall be monitored and recorded. Fuel flow rate shall be monitored and
recorded if stack gas flow rate is determined utilizing EPA reference method
19. This information shall be included
with the test report.
(7) Stack gas flow rate shall be
calculated in accordance with EPA reference method 19 utilizing fuel flow rate
(scf) determined by a dedicated fuel flow meter and fuel heating value
(btu/scf). The owner or operator shall
provide a contemporaneous fuel gas analysis (preferably on the day of the test,
but no earlier than three months before the test date) and a recent fuel flow
meter calibration certificate (within the most recent quarter) with the final
test report. Alternatively, stack gas
flow rate may be determined by using EPA reference methods one through four or
through the use of manufacturer provided fuel consumption rates.
(8) Emissions testing shall be conducted
at least once per calendar year.
Emissions testing required by Subparts GG, IIII, JJJJ, or KKKK of 40 CFR
60, or Subparts ZZZZ or DDDDD of 40 CFR 63, may be used to satisfy the emissions
testing requirements of this Part if it meets the requirements of 20.2.68.104
NMAC and is conducted at least once per calendar year.
[20.2.68.104 NMAC – N, 04/01/2026]
20.2.68.105 RECORDKEEPING REQUIREMENTS:
A. For reasonable progress units one and
two at Cunningham Station Power Plant, the owner or operator shall maintain
records of all NOx CEMS data.
The owner or operator shall also maintain records of periods that the
CEMS are inoperative and of all CEMS performance test measurements, performance
evaluations, calibration checks, adjustments, and maintenance.
B. For all other reasonable progress
units, the owner or operator shall maintain records of all annual emissions
tests and operating data used to determine compliance with the emission
limitations in Table 1 of Subsection A of 20.2.68.102 NMAC. The records shall include:
(1) make, model, and serial number for the
tested engine, turbine, or boiler;
(2) the date and time stamp(s), including
GPS of the location, of any monitoring event, including sampling or
measurements;
(3) date analyses were performed;
(4) name of the person(s) and the
qualified entity that performed the analyses;
(5) analytical or test methods used;
(6) results of analyses or tests;
(7) calculated emissions of NOx
in lb/hr, g/bhp-hr, or ppmvd as appropriate; and
(8) operating conditions at the time of
sampling or measurement, including load and the parameters used to calculate
it.
C. All records required to be maintained
pursuant to Subsections A and B of 20.2.68.105 NMAC shall be kept for a period
of at least five years.
[20.2.68.105 NMAC – N, 04/01/2026]
20.2.68.106 REPORTING REQUIREMENTS:
A. Test reports for annual emissions
tests required by Subsections B and C of 20.2.68.104 NMAC shall be submitted to
the department no later than 30 days after completion of the test.
B. If a 30-operating-day rolling average
for reasonable progress units one and two at Cunningham Station Power Plant, a
12-month rolling sum for reasonable progress units 701, 702, and 703 at
Mountainair Compressor Station No. 7 or reasonable progress units 903 and 904
at Roswell Compressor Station No. 9, or the results of an annual emissions test
for any other reasonable progress unit reveals NOx emissions in
excess of the emission limitations in Table 1 of Subsection A of 20.2.68.102
NMAC, the owner or operator shall submit reports of excess emissions in
accordance with Subsection A of 20.2.7.110 NMAC. Reports of excess emissions shall be
submitted by the means and in the format specified by the department.
C. The owner or operator of a reasonable
progress unit shall respond within three business days to a request for
information by the department under this Part.
The response shall provide the requested information for each reasonable
progress unit subject to the request by the means and in the format specified
by the department in its request. If the
department requests information pertaining to reasonable progress units at
multiple facilities with the same owner or operator, additional time will be
given as appropriate.
[20.2.68.106 NMAC – N, 04/01/2026]
HISTORY OF 20.2.68 NMAC: [RESERVED]